Merge pull request #1781 from open-webui/dev

0.1.122

.eslintrc.cjs

@@ -4,6 +4,7 @@ module.exports = {
 		'eslint:recommended',
 		'plugin:@typescript-eslint/recommended',
 		'plugin:svelte/recommended',
+		'plugin:cypress/recommended',
 		'prettier'
 	],
 	parser: '@typescript-eslint/parser',

.github/pull_request_template.md

@@ -2,14 +2,16 @@
 
 - [ ] **Description:** Briefly describe the changes in this pull request.
 - [ ] **Changelog:** Ensure a changelog entry following the format of [Keep a Changelog](https://keepachangelog.com/) is added at the bottom of the PR description.
-- [ ] **Documentation:** Have you updated relevant documentation?
+- [ ] **Documentation:** Have you updated relevant documentation [Open WebUI Docs](https://github.com/open-webui/docs), or other documentation sources?
 - [ ] **Dependencies:** Are there any new dependencies? Have you updated the dependency versions in the documentation?
+- [ ] **Testing:** Have you written and run sufficient tests for the changes?
+- [ ] **Code Review:** Have you self-reviewed your code and addressed any coding standard issues?
 
 ---
 
 ## Description
 
-[Insert a brief description of the changes made in this pull request]
+[Insert a brief description of the changes made in this pull request, including any relevant motivation and impact.]
 
 ---
 
@@ -17,16 +19,32 @@
 
 ### Added
 
-- [List any new features or additions]
+- [List any new features, functionalities, or additions]
 
 ### Fixed
 
-- [List any fixes or corrections]
+- [List any fixes, corrections, or bug fixes]
 
 ### Changed
 
-- [List any changes or updates]
+- [List any changes, updates, refactorings, or optimizations]
 
 ### Removed
 
-- [List any removed features or files]
+- [List any removed features, files, or deprecated functionalities]
+
+### Security
+
+- [List any new or updated security-related changes, including vulnerability fixes]
+
+### Breaking Changes
+
+- [List any breaking changes affecting compatibility or functionality]
+
+---
+
+### Additional Information
+
+- [Insert any additional context, notes, or explanations for the changes]
+
+- [Reference any related issues, commits, or other relevant information]

.github/workflows/integration-test.yml

+name: Integration Test
+
+on:
+  push:
+    branches:
+      - main
+      - dev
+  pull_request:
+    branches:
+      - main
+      - dev
+
+jobs:
+  cypress-run:
+    name: Run Cypress Integration Tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Build and run Compose Stack
+        run: |
+          docker compose up --detach --build
+
+      - name: Preload Ollama model
+        run: |
+          docker exec ollama ollama pull qwen:0.5b-chat-v1.5-q2_K
+
+      - name: Cypress run
+        uses: cypress-io/github-action@v6
+        with:
+          browser: chrome
+          wait-on: 'http://localhost:3000'
+          config: baseUrl=http://localhost:3000
+
+      - uses: actions/upload-artifact@v4
+        if: always()
+        name: Upload Cypress videos
+        with:
+          name: cypress-videos
+          path: cypress/videos
+          if-no-files-found: ignore
+
+      - name: Extract Compose logs
+        if: always()
+        run: |
+          docker compose logs > compose-logs.txt
+
+      - uses: actions/upload-artifact@v4
+        if: always()
+        name: Upload Compose logs
+        with:
+          name: compose-logs
+          path: compose-logs.txt
+          if-no-files-found: ignore

.gitignore

@@ -297,4 +297,8 @@ dist
 .yarn/unplugged
 .yarn/build-state.yml
 .yarn/install-state.gz
-.pnp.*
\ No newline at end of file
+.pnp.*
+
+# cypress artifacts
+cypress/videos
+cypress/screenshots

CHANGELOG.md

@@ -5,6 +5,30 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.1.122] - 2024-04-27
+
+### Added
+
+- **🌟 Enhanced RAG Pipeline**: Now with hybrid searching via 'BM25', reranking powered by 'CrossEncoder', and configurable relevance score thresholds.
+- **🛢️ External Database Support**: Seamlessly connect to custom SQLite or Postgres databases using the 'DATABASE_URL' environment variable.
+- **🌐 Remote ChromaDB Support**: Introducing the capability to connect to remote ChromaDB servers.
+- **👨‍💼 Improved Admin Panel**: Admins can now conveniently check users' chat lists and last active status directly from the admin panel.
+- **🎨 Splash Screen**: Introducing a loading splash screen for a smoother user experience.
+- **🌍 Language Support Expansion**: Added support for Bangla (bn-BD), along with enhancements to Chinese, Spanish, and Ukrainian translations.
+- **💻 Improved LaTeX Rendering Performance**: Enjoy faster rendering times for LaTeX equations.
+- **🔧 More Environment Variables**: Explore additional environment variables in our documentation (https://docs.openwebui.com), including the 'ENABLE_LITELLM' option to manage memory usage.
+
+### Fixed
+
+- **🔧 Ollama Compatibility**: Resolved errors occurring when Ollama server version isn't an integer, such as SHA builds or RCs.
+- **🐛 Various OpenAI API Issues**: Addressed several issues related to the OpenAI API.
+- **🛑 Stop Sequence Issue**: Fixed the problem where the stop sequence with a backslash '\' was not functioning.
+- **🔤 Font Fallback**: Corrected font fallback issue.
+
+### Changed
+
+- **⌨️ Prompt Input Behavior on Mobile**: Enter key prompt submission disabled on mobile devices for improved user experience.
+
 ## [0.1.121] - 2024-04-24
 
 ### Fixed

Dockerfile

@@ -8,8 +8,9 @@ ARG USE_CUDA_VER=cu121
 # any sentence transformer model; models to use can be found at https://huggingface.co/models?library=sentence-transformers
 # Leaderboard: https://huggingface.co/spaces/mteb/leaderboard 
 # for better performance and multilangauge support use "intfloat/multilingual-e5-large" (~2.5GB) or "intfloat/multilingual-e5-base" (~1.5GB)
-# IMPORTANT: If you change the default model (sentence-transformers/all-MiniLM-L6-v2) and vice versa, you aren't able to use RAG Chat with your previous documents loaded in the WebUI! You need to re-embed them.
+# IMPORTANT: If you change the embedding model (sentence-transformers/all-MiniLM-L6-v2) and vice versa, you aren't able to use RAG Chat with your previous documents loaded in the WebUI! You need to re-embed them.
 ARG USE_EMBEDDING_MODEL=sentence-transformers/all-MiniLM-L6-v2
+ARG USE_RERANKING_MODEL=""
 
 ######## WebUI frontend ########
 FROM --platform=$BUILDPLATFORM node:21-alpine3.19 as build
@@ -30,6 +31,7 @@ ARG USE_CUDA
 ARG USE_OLLAMA
 ARG USE_CUDA_VER
 ARG USE_EMBEDDING_MODEL
+ARG USE_RERANKING_MODEL
 
 ## Basis ##
 ENV ENV=prod \
@@ -38,7 +40,8 @@ ENV ENV=prod \
     USE_OLLAMA_DOCKER=${USE_OLLAMA} \
     USE_CUDA_DOCKER=${USE_CUDA} \
     USE_CUDA_DOCKER_VER=${USE_CUDA_VER} \
-    USE_EMBEDDING_MODEL_DOCKER=${USE_EMBEDDING_MODEL}
+    USE_EMBEDDING_MODEL_DOCKER=${USE_EMBEDDING_MODEL} \
+    USE_RERANKING_MODEL_DOCKER=${USE_RERANKING_MODEL}
 
 ## Basis URL Config ##
 ENV OLLAMA_BASE_URL="/ollama" \
@@ -62,8 +65,11 @@ ENV WHISPER_MODEL="base" \
 
 ## RAG Embedding model settings ##
 ENV RAG_EMBEDDING_MODEL="$USE_EMBEDDING_MODEL_DOCKER" \
-    RAG_EMBEDDING_MODEL_DIR="/app/backend/data/cache/embedding/models" \
+    RAG_RERANKING_MODEL="$USE_RERANKING_MODEL_DOCKER" \
     SENTENCE_TRANSFORMERS_HOME="/app/backend/data/cache/embedding/models"
+
+## Hugging Face download cache ##
+ENV HF_HOME="/app/backend/data/cache/embedding/models"
 #### Other models ##########################################################
 
 WORKDIR /app/backend

Makefile

+
+ifneq ($(shell which docker-compose 2>/dev/null),)
+    DOCKER_COMPOSE := docker-compose
+else
+    DOCKER_COMPOSE := docker compose
+endif
+
 install:
-	@docker-compose up -d
+	$(DOCKER_COMPOSE) up -d
 
 remove:
 	@chmod +x confirm_remove.sh
 	@./confirm_remove.sh
 
-
 start:
-	@docker-compose start
+	$(DOCKER_COMPOSE) start
 startAndBuild: 
-	docker-compose up -d --build
+	$(DOCKER_COMPOSE) up -d --build
 
 stop:
-	@docker-compose stop
+	$(DOCKER_COMPOSE) stop
 
 update:
 	# Calls the LLM update script
 	chmod +x update_ollama_models.sh
 	@./update_ollama_models.sh
 	@git pull
-	@docker-compose down
+	$(DOCKER_COMPOSE) down
 	# Make sure the ollama-webui container is stopped before rebuilding
 	@docker stop open-webui || true
-	@docker-compose up --build -d
-	@docker-compose start
+	$(DOCKER_COMPOSE) up --build -d
+	$(DOCKER_COMPOSE) start
 

backend/apps/images/main.py

@@ -32,11 +32,15 @@ import logging
 from config import (
     SRC_LOG_LEVELS,
     CACHE_DIR,
+    IMAGE_GENERATION_ENGINE,
     ENABLE_IMAGE_GENERATION,
     AUTOMATIC1111_BASE_URL,
     COMFYUI_BASE_URL,
     IMAGES_OPENAI_API_BASE_URL,
     IMAGES_OPENAI_API_KEY,
+    IMAGE_GENERATION_MODEL,
+    IMAGE_SIZE,
+    IMAGE_STEPS,
 )
 
 
@@ -55,21 +59,21 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
-app.state.ENGINE = ""
+app.state.ENGINE = IMAGE_GENERATION_ENGINE
 app.state.ENABLED = ENABLE_IMAGE_GENERATION
 
 app.state.OPENAI_API_BASE_URL = IMAGES_OPENAI_API_BASE_URL
 app.state.OPENAI_API_KEY = IMAGES_OPENAI_API_KEY
 
-app.state.MODEL = ""
+app.state.MODEL = IMAGE_GENERATION_MODEL
 
 
 app.state.AUTOMATIC1111_BASE_URL = AUTOMATIC1111_BASE_URL
 app.state.COMFYUI_BASE_URL = COMFYUI_BASE_URL
 
 
-app.state.IMAGE_SIZE = "512x512"
-app.state.IMAGE_STEPS = 50
+app.state.IMAGE_SIZE = IMAGE_SIZE
+app.state.IMAGE_STEPS = IMAGE_STEPS
 
 
 @app.get("/config")

backend/apps/litellm/main.py

@@ -21,12 +21,15 @@ from utils.utils import get_verified_user, get_current_user, get_admin_user
 from config import SRC_LOG_LEVELS, ENV
 from constants import MESSAGES
 
+import os
+
 log = logging.getLogger(__name__)
 log.setLevel(SRC_LOG_LEVELS["LITELLM"])
 
 
 from config import (
-    MODEL_FILTER_ENABLED,
+    ENABLE_LITELLM,
+    ENABLE_MODEL_FILTER,
     MODEL_FILTER_LIST,
     DATA_DIR,
     LITELLM_PROXY_PORT,
@@ -57,11 +60,20 @@ LITELLM_CONFIG_DIR = f"{DATA_DIR}/litellm/config.yaml"
 with open(LITELLM_CONFIG_DIR, "r") as file:
     litellm_config = yaml.safe_load(file)
 
+
+app.state.ENABLE = ENABLE_LITELLM
 app.state.CONFIG = litellm_config
 
 # Global variable to store the subprocess reference
 background_process = None
 
+CONFLICT_ENV_VARS = [
+    # Uvicorn uses PORT, so LiteLLM might use it as well
+    "PORT",
+    # LiteLLM uses DATABASE_URL for Prisma connections
+    "DATABASE_URL",
+]
+
 
 async def run_background_process(command):
     global background_process
@@ -70,9 +82,11 @@ async def run_background_process(command):
     try:
         # Log the command to be executed
         log.info(f"Executing command: {command}")
+        # Filter environment variables known to conflict with litellm
+        env = {k: v for k, v in os.environ.items() if k not in CONFLICT_ENV_VARS}
         # Execute the command and create a subprocess
         process = await asyncio.create_subprocess_exec(
-            *command, stdout=subprocess.PIPE, stderr=subprocess.PIPE
+            *command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env
         )
         background_process = process
         log.info("Subprocess started successfully.")
@@ -130,7 +144,7 @@ async def startup_event():
     asyncio.create_task(start_litellm_background())
 
 
-app.state.MODEL_FILTER_ENABLED = MODEL_FILTER_ENABLED
+app.state.ENABLE_MODEL_FILTER = ENABLE_MODEL_FILTER
 app.state.MODEL_FILTER_LIST = MODEL_FILTER_LIST
 
 
@@ -198,49 +212,56 @@ async def update_config(form_data: LiteLLMConfigForm, user=Depends(get_admin_use
 @app.get("/models")
 @app.get("/v1/models")
 async def get_models(user=Depends(get_current_user)):
-    while not background_process:
-        await asyncio.sleep(0.1)
-
-    url = f"http://localhost:{LITELLM_PROXY_PORT}/v1"
-    r = None
-    try:
-        r = requests.request(method="GET", url=f"{url}/models")
-        r.raise_for_status()
-
-        data = r.json()
 
-        if app.state.MODEL_FILTER_ENABLED:
-            if user and user.role == "user":
-                data["data"] = list(
-                    filter(
-                        lambda model: model["id"] in app.state.MODEL_FILTER_LIST,
-                        data["data"],
+    if app.state.ENABLE:
+        while not background_process:
+            await asyncio.sleep(0.1)
+
+        url = f"http://localhost:{LITELLM_PROXY_PORT}/v1"
+        r = None
+        try:
+            r = requests.request(method="GET", url=f"{url}/models")
+            r.raise_for_status()
+
+            data = r.json()
+
+            if app.state.ENABLE_MODEL_FILTER:
+                if user and user.role == "user":
+                    data["data"] = list(
+                        filter(
+                            lambda model: model["id"] in app.state.MODEL_FILTER_LIST,
+                            data["data"],
+                        )
                     )
-                )
-
-        return data
-    except Exception as e:
-
-        log.exception(e)
-        error_detail = "Open WebUI: Server Connection Error"
-        if r is not None:
-            try:
-                res = r.json()
-                if "error" in res:
-                    error_detail = f"External: {res['error']}"
-            except:
-                error_detail = f"External: {e}"
 
+            return data
+        except Exception as e:
+
+            log.exception(e)
+            error_detail = "Open WebUI: Server Connection Error"
+            if r is not None:
+                try:
+                    res = r.json()
+                    if "error" in res:
+                        error_detail = f"External: {res['error']}"
+                except:
+                    error_detail = f"External: {e}"
+
+            return {
+                "data": [
+                    {
+                        "id": model["model_name"],
+                        "object": "model",
+                        "created": int(time.time()),
+                        "owned_by": "openai",
+                    }
+                    for model in app.state.CONFIG["model_list"]
+                ],
+                "object": "list",
+            }
+    else:
         return {
-            "data": [
-                {
-                    "id": model["model_name"],
-                    "object": "model",
-                    "created": int(time.time()),
-                    "owned_by": "openai",
-                }
-                for model in app.state.CONFIG["model_list"]
-            ],
+            "data": [],
             "object": "list",
         }
 

backend/apps/ollama/main.py

@@ -16,6 +16,7 @@ from fastapi.concurrency import run_in_threadpool
 from pydantic import BaseModel, ConfigDict
 
 import os
+import re
 import copy
 import random
 import requests
@@ -36,7 +37,7 @@ from utils.utils import decode_token, get_current_user, get_admin_user
 from config import (
     SRC_LOG_LEVELS,
     OLLAMA_BASE_URLS,
-    MODEL_FILTER_ENABLED,
+    ENABLE_MODEL_FILTER,
     MODEL_FILTER_LIST,
     UPLOAD_DIR,
 )
@@ -55,7 +56,7 @@ app.add_middleware(
 )
 
 
-app.state.MODEL_FILTER_ENABLED = MODEL_FILTER_ENABLED
+app.state.ENABLE_MODEL_FILTER = ENABLE_MODEL_FILTER
 app.state.MODEL_FILTER_LIST = MODEL_FILTER_LIST
 
 app.state.OLLAMA_BASE_URLS = OLLAMA_BASE_URLS
@@ -168,7 +169,7 @@ async def get_ollama_tags(
     if url_idx == None:
         models = await get_all_models()
 
-        if app.state.MODEL_FILTER_ENABLED:
+        if app.state.ENABLE_MODEL_FILTER:
             if user.role == "user":
                 models["models"] = list(
                     filter(
@@ -216,7 +217,9 @@ async def get_ollama_versions(url_idx: Optional[int] = None):
         if len(responses) > 0:
             lowest_version = min(
                 responses,
-                key=lambda x: tuple(map(int, x["version"].split("-")[0].split("."))),
+                key=lambda x: tuple(
+                    map(int, re.sub(r"^v|-.*", "", x["version"]).split("."))
+                ),
             )
 
             return {"version": lowest_version["version"]}

backend/apps/openai/main.py

@@ -24,7 +24,7 @@ from config import (
     OPENAI_API_BASE_URLS,
     OPENAI_API_KEYS,
     CACHE_DIR,
-    MODEL_FILTER_ENABLED,
+    ENABLE_MODEL_FILTER,
     MODEL_FILTER_LIST,
 )
 from typing import List, Optional
@@ -45,7 +45,7 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
-app.state.MODEL_FILTER_ENABLED = MODEL_FILTER_ENABLED
+app.state.ENABLE_MODEL_FILTER = ENABLE_MODEL_FILTER
 app.state.MODEL_FILTER_LIST = MODEL_FILTER_LIST
 
 app.state.OPENAI_API_BASE_URLS = OPENAI_API_BASE_URLS
@@ -225,7 +225,7 @@ async def get_all_models():
 async def get_models(url_idx: Optional[int] = None, user=Depends(get_current_user)):
     if url_idx == None:
         models = await get_all_models()
-        if app.state.MODEL_FILTER_ENABLED:
+        if app.state.ENABLE_MODEL_FILTER:
             if user.role == "user":
                 models["data"] = list(
                     filter(

backend/apps/rag/main.py

@@ -39,8 +39,6 @@ import json
 
 import sentence_transformers
 
-from apps.ollama.main import generate_ollama_embeddings, GenerateEmbeddingsForm
-
 from apps.web.models.documents import (
     Documents,
     DocumentForm,
@@ -48,9 +46,12 @@ from apps.web.models.documents import (
 )
 
 from apps.rag.utils import (
-    query_embeddings_doc,
-    query_embeddings_collection,
-    generate_openai_embeddings,
+    get_model_path,
+    get_embedding_function,
+    query_doc,
+    query_doc_with_hybrid_search,
+    query_collection,
+    query_collection_with_hybrid_search,
 )
 
 from utils.misc import (
@@ -60,13 +61,22 @@ from utils.misc import (
     extract_folders_after_data_docs,
 )
 from utils.utils import get_current_user, get_admin_user
+
 from config import (
     SRC_LOG_LEVELS,
     UPLOAD_DIR,
     DOCS_DIR,
+    RAG_TOP_K,
+    RAG_RELEVANCE_THRESHOLD,
     RAG_EMBEDDING_ENGINE,
     RAG_EMBEDDING_MODEL,
+    RAG_EMBEDDING_MODEL_AUTO_UPDATE,
     RAG_EMBEDDING_MODEL_TRUST_REMOTE_CODE,
+    ENABLE_RAG_HYBRID_SEARCH,
+    RAG_RERANKING_MODEL,
+    PDF_EXTRACT_IMAGES,
+    RAG_RERANKING_MODEL_AUTO_UPDATE,
+    RAG_RERANKING_MODEL_TRUST_REMOTE_CODE,
     RAG_OPENAI_API_BASE_URL,
     RAG_OPENAI_API_KEY,
     DEVICE_TYPE,
@@ -83,31 +93,75 @@ log.setLevel(SRC_LOG_LEVELS["RAG"])
 
 app = FastAPI()
 
+app.state.TOP_K = RAG_TOP_K
+app.state.RELEVANCE_THRESHOLD = RAG_RELEVANCE_THRESHOLD
+
+app.state.ENABLE_RAG_HYBRID_SEARCH = ENABLE_RAG_HYBRID_SEARCH
 
-app.state.TOP_K = 4
 app.state.CHUNK_SIZE = CHUNK_SIZE
 app.state.CHUNK_OVERLAP = CHUNK_OVERLAP
 
-
 app.state.RAG_EMBEDDING_ENGINE = RAG_EMBEDDING_ENGINE
 app.state.RAG_EMBEDDING_MODEL = RAG_EMBEDDING_MODEL
+app.state.RAG_RERANKING_MODEL = RAG_RERANKING_MODEL
 app.state.RAG_TEMPLATE = RAG_TEMPLATE
 
 app.state.OPENAI_API_BASE_URL = RAG_OPENAI_API_BASE_URL
 app.state.OPENAI_API_KEY = RAG_OPENAI_API_KEY
 
-app.state.PDF_EXTRACT_IMAGES = False
+app.state.PDF_EXTRACT_IMAGES = PDF_EXTRACT_IMAGES
 
-if app.state.RAG_EMBEDDING_ENGINE == "":
-    app.state.sentence_transformer_ef = sentence_transformers.SentenceTransformer(
-        app.state.RAG_EMBEDDING_MODEL,
-        device=DEVICE_TYPE,
-        trust_remote_code=RAG_EMBEDDING_MODEL_TRUST_REMOTE_CODE,
-    )
+
+def update_embedding_model(
+    embedding_model: str,
+    update_model: bool = False,
+):
+    if embedding_model and app.state.RAG_EMBEDDING_ENGINE == "":
+        app.state.sentence_transformer_ef = sentence_transformers.SentenceTransformer(
+            get_model_path(embedding_model, update_model),
+            device=DEVICE_TYPE,
+            trust_remote_code=RAG_EMBEDDING_MODEL_TRUST_REMOTE_CODE,
+        )
+    else:
+        app.state.sentence_transformer_ef = None
+
+
+def update_reranking_model(
+    reranking_model: str,
+    update_model: bool = False,
+):
+    if reranking_model:
+        app.state.sentence_transformer_rf = sentence_transformers.CrossEncoder(
+            get_model_path(reranking_model, update_model),
+            device=DEVICE_TYPE,
+            trust_remote_code=RAG_RERANKING_MODEL_TRUST_REMOTE_CODE,
+        )
+    else:
+        app.state.sentence_transformer_rf = None
+
+
+update_embedding_model(
+    app.state.RAG_EMBEDDING_MODEL,
+    RAG_EMBEDDING_MODEL_AUTO_UPDATE,
+)
+
+update_reranking_model(
+    app.state.RAG_RERANKING_MODEL,
+    RAG_RERANKING_MODEL_AUTO_UPDATE,
+)
 
 
+app.state.EMBEDDING_FUNCTION = get_embedding_function(
+    app.state.RAG_EMBEDDING_ENGINE,
+    app.state.RAG_EMBEDDING_MODEL,
+    app.state.sentence_transformer_ef,
+    app.state.OPENAI_API_KEY,
+    app.state.OPENAI_API_BASE_URL,
+)
+
 origins = ["*"]
 
+
 app.add_middleware(
     CORSMiddleware,
     allow_origins=origins,
@@ -134,6 +188,7 @@ async def get_status():
         "template": app.state.RAG_TEMPLATE,
         "embedding_engine": app.state.RAG_EMBEDDING_ENGINE,
         "embedding_model": app.state.RAG_EMBEDDING_MODEL,
+        "reranking_model": app.state.RAG_RERANKING_MODEL,
     }
 
 
@@ -150,6 +205,11 @@ async def get_embedding_config(user=Depends(get_admin_user)):
     }
 
 
+@app.get("/reranking")
+async def get_reraanking_config(user=Depends(get_admin_user)):
+    return {"status": True, "reranking_model": app.state.RAG_RERANKING_MODEL}
+
+
 class OpenAIConfigForm(BaseModel):
     url: str
     key: str
@@ -170,22 +230,22 @@ async def update_embedding_config(
     )
     try:
         app.state.RAG_EMBEDDING_ENGINE = form_data.embedding_engine
+        app.state.RAG_EMBEDDING_MODEL = form_data.embedding_model
 
         if app.state.RAG_EMBEDDING_ENGINE in ["ollama", "openai"]:
-            app.state.RAG_EMBEDDING_MODEL = form_data.embedding_model
-            app.state.sentence_transformer_ef = None
-
             if form_data.openai_config != None:
                 app.state.OPENAI_API_BASE_URL = form_data.openai_config.url
                 app.state.OPENAI_API_KEY = form_data.openai_config.key
-        else:
-            sentence_transformer_ef = sentence_transformers.SentenceTransformer(
-                app.state.RAG_EMBEDDING_MODEL,
-                device=DEVICE_TYPE,
-                trust_remote_code=RAG_EMBEDDING_MODEL_TRUST_REMOTE_CODE,
-            )
-            app.state.RAG_EMBEDDING_MODEL = form_data.embedding_model
-            app.state.sentence_transformer_ef = sentence_transformer_ef
+
+        update_embedding_model(app.state.RAG_EMBEDDING_MODEL, True)
+
+        app.state.EMBEDDING_FUNCTION = get_embedding_function(
+            app.state.RAG_EMBEDDING_ENGINE,
+            app.state.RAG_EMBEDDING_MODEL,
+            app.state.sentence_transformer_ef,
+            app.state.OPENAI_API_KEY,
+            app.state.OPENAI_API_BASE_URL,
+        )
 
         return {
             "status": True,
@@ -196,7 +256,6 @@ async def update_embedding_config(
                 "key": app.state.OPENAI_API_KEY,
             },
         }
-
     except Exception as e:
         log.exception(f"Problem updating embedding model: {e}")
         raise HTTPException(
@@ -205,6 +264,34 @@ async def update_embedding_config(
         )
 
 
+class RerankingModelUpdateForm(BaseModel):
+    reranking_model: str
+
+
+@app.post("/reranking/update")
+async def update_reranking_config(
+    form_data: RerankingModelUpdateForm, user=Depends(get_admin_user)
+):
+    log.info(
+        f"Updating reranking model: {app.state.RAG_RERANKING_MODEL} to {form_data.reranking_model}"
+    )
+    try:
+        app.state.RAG_RERANKING_MODEL = form_data.reranking_model
+
+        update_reranking_model(app.state.RAG_RERANKING_MODEL, True)
+
+        return {
+            "status": True,
+            "reranking_model": app.state.RAG_RERANKING_MODEL,
+        }
+    except Exception as e:
+        log.exception(f"Problem updating reranking model: {e}")
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=ERROR_MESSAGES.DEFAULT(e),
+        )
+
+
 @app.get("/config")
 async def get_rag_config(user=Depends(get_admin_user)):
     return {
@@ -257,12 +344,16 @@ async def get_query_settings(user=Depends(get_admin_user)):
         "status": True,
         "template": app.state.RAG_TEMPLATE,
         "k": app.state.TOP_K,
+        "r": app.state.RELEVANCE_THRESHOLD,
+        "hybrid": app.state.ENABLE_RAG_HYBRID_SEARCH,
     }
 
 
 class QuerySettingsForm(BaseModel):
     k: Optional[int] = None
+    r: Optional[float] = None
     template: Optional[str] = None
+    hybrid: Optional[bool] = None
 
 
 @app.post("/query/settings/update")
@@ -271,13 +362,23 @@ async def update_query_settings(
 ):
     app.state.RAG_TEMPLATE = form_data.template if form_data.template else RAG_TEMPLATE
     app.state.TOP_K = form_data.k if form_data.k else 4
-    return {"status": True, "template": app.state.RAG_TEMPLATE}
+    app.state.RELEVANCE_THRESHOLD = form_data.r if form_data.r else 0.0
+    app.state.ENABLE_RAG_HYBRID_SEARCH = form_data.hybrid if form_data.hybrid else False
+    return {
+        "status": True,
+        "template": app.state.RAG_TEMPLATE,
+        "k": app.state.TOP_K,
+        "r": app.state.RELEVANCE_THRESHOLD,
+        "hybrid": app.state.ENABLE_RAG_HYBRID_SEARCH,
+    }
 
 
 class QueryDocForm(BaseModel):
     collection_name: str
     query: str
     k: Optional[int] = None
+    r: Optional[float] = None
+    hybrid: Optional[bool] = None
 
 
 @app.post("/query/doc")
@@ -286,34 +387,22 @@ def query_doc_handler(
     user=Depends(get_current_user),
 ):
     try:
-        if app.state.RAG_EMBEDDING_ENGINE == "":
-            query_embeddings = app.state.sentence_transformer_ef.encode(
-                form_data.query
-            ).tolist()
-        elif app.state.RAG_EMBEDDING_ENGINE == "ollama":
-            query_embeddings = generate_ollama_embeddings(
-                GenerateEmbeddingsForm(
-                    **{
-                        "model": app.state.RAG_EMBEDDING_MODEL,
-                        "prompt": form_data.query,
-                    }
-                )
+        if app.state.ENABLE_RAG_HYBRID_SEARCH:
+            return query_doc_with_hybrid_search(
+                collection_name=form_data.collection_name,
+                query=form_data.query,
+                embeddings_function=app.state.EMBEDDING_FUNCTION,
+                reranking_function=app.state.sentence_transformer_rf,
+                k=form_data.k if form_data.k else app.state.TOP_K,
+                r=form_data.r if form_data.r else app.state.RELEVANCE_THRESHOLD,
             )
-        elif app.state.RAG_EMBEDDING_ENGINE == "openai":
-            query_embeddings = generate_openai_embeddings(
-                model=app.state.RAG_EMBEDDING_MODEL,
-                text=form_data.query,
-                key=app.state.OPENAI_API_KEY,
-                url=app.state.OPENAI_API_BASE_URL,
+        else:
+            return query_doc(
+                collection_name=form_data.collection_name,
+                query=form_data.query,
+                embeddings_function=app.state.EMBEDDING_FUNCTION,
+                k=form_data.k if form_data.k else app.state.TOP_K,
             )
-
-        return query_embeddings_doc(
-            collection_name=form_data.collection_name,
-            query=form_data.query,
-            query_embeddings=query_embeddings,
-            k=form_data.k if form_data.k else app.state.TOP_K,
-        )
-
     except Exception as e:
         log.exception(e)
         raise HTTPException(
@@ -326,6 +415,8 @@ class QueryCollectionsForm(BaseModel):
     collection_names: List[str]
     query: str
     k: Optional[int] = None
+    r: Optional[float] = None
+    hybrid: Optional[bool] = None
 
 
 @app.post("/query/collection")
@@ -334,33 +425,23 @@ def query_collection_handler(
     user=Depends(get_current_user),
 ):
     try:
-        if app.state.RAG_EMBEDDING_ENGINE == "":
-            query_embeddings = app.state.sentence_transformer_ef.encode(
-                form_data.query
-            ).tolist()
-        elif app.state.RAG_EMBEDDING_ENGINE == "ollama":
-            query_embeddings = generate_ollama_embeddings(
-                GenerateEmbeddingsForm(
-                    **{
-                        "model": app.state.RAG_EMBEDDING_MODEL,
-                        "prompt": form_data.query,
-                    }
-                )
+        if app.state.ENABLE_RAG_HYBRID_SEARCH:
+            return query_collection_with_hybrid_search(
+                collection_names=form_data.collection_names,
+                query=form_data.query,
+                embeddings_function=app.state.EMBEDDING_FUNCTION,
+                reranking_function=app.state.sentence_transformer_rf,
+                k=form_data.k if form_data.k else app.state.TOP_K,
+                r=form_data.r if form_data.r else app.state.RELEVANCE_THRESHOLD,
             )
-        elif app.state.RAG_EMBEDDING_ENGINE == "openai":
-            query_embeddings = generate_openai_embeddings(
-                model=app.state.RAG_EMBEDDING_MODEL,
-                text=form_data.query,
-                key=app.state.OPENAI_API_KEY,
-                url=app.state.OPENAI_API_BASE_URL,
+        else:
+            return query_collection(
+                collection_names=form_data.collection_names,
+                query=form_data.query,
+                embeddings_function=app.state.EMBEDDING_FUNCTION,
+                k=form_data.k if form_data.k else app.state.TOP_K,
             )
 
-        return query_embeddings_collection(
-            collection_names=form_data.collection_names,
-            query_embeddings=query_embeddings,
-            k=form_data.k if form_data.k else app.state.TOP_K,
-        )
-
     except Exception as e:
         log.exception(e)
         raise HTTPException(
@@ -427,8 +508,6 @@ def store_docs_in_vector_db(docs, collection_name, overwrite: bool = False) -> b
     log.info(f"store_docs_in_vector_db {docs} {collection_name}")
 
     texts = [doc.page_content for doc in docs]
-    texts = list(map(lambda x: x.replace("\n", " "), texts))
-
     metadatas = [doc.metadata for doc in docs]
 
     try:
@@ -440,27 +519,16 @@ def store_docs_in_vector_db(docs, collection_name, overwrite: bool = False) -> b
 
         collection = CHROMA_CLIENT.create_collection(name=collection_name)
 
-        if app.state.RAG_EMBEDDING_ENGINE == "":
-            embeddings = app.state.sentence_transformer_ef.encode(texts).tolist()
-        elif app.state.RAG_EMBEDDING_ENGINE == "ollama":
-            embeddings = [
-                generate_ollama_embeddings(
-                    GenerateEmbeddingsForm(
-                        **{"model": app.state.RAG_EMBEDDING_MODEL, "prompt": text}
-                    )
-                )
-                for text in texts
-            ]
-        elif app.state.RAG_EMBEDDING_ENGINE == "openai":
-            embeddings = [
-                generate_openai_embeddings(
-                    model=app.state.RAG_EMBEDDING_MODEL,
-                    text=text,
-                    key=app.state.OPENAI_API_KEY,
-                    url=app.state.OPENAI_API_BASE_URL,
-                )
-                for text in texts
-            ]
+        embedding_func = get_embedding_function(
+            app.state.RAG_EMBEDDING_ENGINE,
+            app.state.RAG_EMBEDDING_MODEL,
+            app.state.sentence_transformer_ef,
+            app.state.OPENAI_API_KEY,
+            app.state.OPENAI_API_BASE_URL,
+        )
+
+        embedding_texts = list(map(lambda x: x.replace("\n", " "), texts))
+        embeddings = embedding_func(embedding_texts)
 
         for batch in create_batches(
             api=CHROMA_CLIENT,

backend/apps/rag/utils.py

+import os
 import logging
 import requests
 
@@ -8,6 +9,16 @@ from apps.ollama.main import (
     GenerateEmbeddingsForm,
 )
 
+from huggingface_hub import snapshot_download
+
+from langchain_core.documents import Document
+from langchain_community.retrievers import BM25Retriever
+from langchain.retrievers import (
+    ContextualCompressionRetriever,
+    EnsembleRetriever,
+)
+
+from typing import Optional
 from config import SRC_LOG_LEVELS, CHROMA_CLIENT
 
 
@@ -15,88 +26,164 @@ log = logging.getLogger(__name__)
 log.setLevel(SRC_LOG_LEVELS["RAG"])
 
 
-def query_embeddings_doc(collection_name: str, query: str, query_embeddings, k: int):
+def query_doc(
+    collection_name: str,
+    query: str,
+    embedding_function,
+    k: int,
+):
     try:
-        # if you use docker use the model from the environment variable
-        log.info(f"query_embeddings_doc {query_embeddings}")
         collection = CHROMA_CLIENT.get_collection(name=collection_name)
-
+        query_embeddings = embedding_function(query)
         result = collection.query(
             query_embeddings=[query_embeddings],
             n_results=k,
         )
 
-        log.info(f"query_embeddings_doc:result {result}")
+        log.info(f"query_doc:result {result}")
+        return result
+    except Exception as e:
+        raise e
+
+
+def query_doc_with_hybrid_search(
+    collection_name: str,
+    query: str,
+    embedding_function,
+    k: int,
+    reranking_function,
+    r: int,
+):
+    try:
+        collection = CHROMA_CLIENT.get_collection(name=collection_name)
+        documents = collection.get()  # get all documents
+
+        bm25_retriever = BM25Retriever.from_texts(
+            texts=documents.get("documents"),
+            metadatas=documents.get("metadatas"),
+        )
+        bm25_retriever.k = k
+
+        chroma_retriever = ChromaRetriever(
+            collection=collection,
+            embedding_function=embedding_function,
+            top_n=k,
+        )
+
+        ensemble_retriever = EnsembleRetriever(
+            retrievers=[bm25_retriever, chroma_retriever], weights=[0.5, 0.5]
+        )
+
+        compressor = RerankCompressor(
+            embedding_function=embedding_function,
+            reranking_function=reranking_function,
+            r_score=r,
+            top_n=k,
+        )
+
+        compression_retriever = ContextualCompressionRetriever(
+            base_compressor=compressor, base_retriever=ensemble_retriever
+        )
+
+        result = compression_retriever.invoke(query)
+        result = {
+            "distances": [[d.metadata.get("score") for d in result]],
+            "documents": [[d.page_content for d in result]],
+            "metadatas": [[d.metadata for d in result]],
+        }
+        log.info(f"query_doc_with_hybrid_search:result {result}")
         return result
     except Exception as e:
         raise e
 
 
-def merge_and_sort_query_results(query_results, k):
+def merge_and_sort_query_results(query_results, k, reverse=False):
     # Initialize lists to store combined data
-    combined_ids = []
     combined_distances = []
-    combined_metadatas = []
     combined_documents = []
+    combined_metadatas = []
 
-    # Combine data from each dictionary
     for data in query_results:
-        combined_ids.extend(data["ids"][0])
         combined_distances.extend(data["distances"][0])
-        combined_metadatas.extend(data["metadatas"][0])
         combined_documents.extend(data["documents"][0])
+        combined_metadatas.extend(data["metadatas"][0])
 
-    # Create a list of tuples (distance, id, metadata, document)
-    combined = list(
-        zip(combined_distances, combined_ids, combined_metadatas, combined_documents)
-    )
+    # Create a list of tuples (distance, document, metadata)
+    combined = list(zip(combined_distances, combined_documents, combined_metadatas))
 
     # Sort the list based on distances
-    combined.sort(key=lambda x: x[0])
+    combined.sort(key=lambda x: x[0], reverse=reverse)
 
-    # Unzip the sorted list
-    sorted_distances, sorted_ids, sorted_metadatas, sorted_documents = zip(*combined)
+    # We don't have anything :-(
+    if not combined:
+        sorted_distances = []
+        sorted_documents = []
+        sorted_metadatas = []
+    else:
+        # Unzip the sorted list
+        sorted_distances, sorted_documents, sorted_metadatas = zip(*combined)
 
-    # Slicing the lists to include only k elements
-    sorted_distances = list(sorted_distances)[:k]
-    sorted_ids = list(sorted_ids)[:k]
-    sorted_metadatas = list(sorted_metadatas)[:k]
-    sorted_documents = list(sorted_documents)[:k]
+        # Slicing the lists to include only k elements
+        sorted_distances = list(sorted_distances)[:k]
+        sorted_documents = list(sorted_documents)[:k]
+        sorted_metadatas = list(sorted_metadatas)[:k]
 
     # Create the output dictionary
-    merged_query_results = {
-        "ids": [sorted_ids],
+    result = {
         "distances": [sorted_distances],
-        "metadatas": [sorted_metadatas],
         "documents": [sorted_documents],
-        "embeddings": None,
-        "uris": None,
-        "data": None,
+        "metadatas": [sorted_metadatas],
     }
 
-    return merged_query_results
+    return result
 
 
-def query_embeddings_collection(
-    collection_names: List[str], query: str, query_embeddings, k: int
+def query_collection(
+    collection_names: List[str],
+    query: str,
+    embedding_function,
+    k: int,
 ):
-
     results = []
-    log.info(f"query_embeddings_collection {query_embeddings}")
+    for collection_name in collection_names:
+        try:
+            result = query_doc(
+                collection_name=collection_name,
+                query=query,
+                k=k,
+                embedding_function=embedding_function,
+            )
+            results.append(result)
+        except:
+            pass
+    return merge_and_sort_query_results(results, k=k)
+
 
+def query_collection_with_hybrid_search(
+    collection_names: List[str],
+    query: str,
+    embedding_function,
+    k: int,
+    reranking_function,
+    r: float,
+):
+
+    results = []
     for collection_name in collection_names:
         try:
-            result = query_embeddings_doc(
+            result = query_doc_with_hybrid_search(
                 collection_name=collection_name,
                 query=query,
-                query_embeddings=query_embeddings,
+                embedding_function=embedding_function,
                 k=k,
+                reranking_function=reranking_function,
+                r=r,
             )
             results.append(result)
         except:
             pass
 
-    return merge_and_sort_query_results(results, k)
+    return merge_and_sort_query_results(results, k=k, reverse=True)
 
 
 def rag_template(template: str, context: str, query: str):
@@ -105,20 +192,53 @@ def rag_template(template: str, context: str, query: str):
     return template
 
 
-def rag_messages(
-    docs,
-    messages,
-    template,
-    k,
+def get_embedding_function(
     embedding_engine,
     embedding_model,
     embedding_function,
     openai_key,
     openai_url,
 ):
-    log.debug(
-        f"docs: {docs} {messages} {embedding_engine} {embedding_model} {embedding_function} {openai_key} {openai_url}"
-    )
+    if embedding_engine == "":
+        return lambda query: embedding_function.encode(query).tolist()
+    elif embedding_engine in ["ollama", "openai"]:
+        if embedding_engine == "ollama":
+            func = lambda query: generate_ollama_embeddings(
+                GenerateEmbeddingsForm(
+                    **{
+                        "model": embedding_model,
+                        "prompt": query,
+                    }
+                )
+            )
+        elif embedding_engine == "openai":
+            func = lambda query: generate_openai_embeddings(
+                model=embedding_model,
+                text=query,
+                key=openai_key,
+                url=openai_url,
+            )
+
+        def generate_multiple(query, f):
+            if isinstance(query, list):
+                return [f(q) for q in query]
+            else:
+                return f(query)
+
+        return lambda query: generate_multiple(query, func)
+
+
+def rag_messages(
+    docs,
+    messages,
+    template,
+    embedding_function,
+    k,
+    reranking_function,
+    r,
+    hybrid_search,
+):
+    log.debug(f"docs: {docs} {messages} {embedding_function} {reranking_function}")
 
     last_user_message_idx = None
     for i in range(len(messages) - 1, -1, -1):
@@ -145,62 +265,65 @@ def rag_messages(
         content_type = None
         query = ""
 
+    extracted_collections = []
     relevant_contexts = []
 
     for doc in docs:
         context = None
 
-        try:
+        collection = doc.get("collection_name")
+        if collection:
+            collection = [collection]
+        else:
+            collection = doc.get("collection_names", [])
+
+        collection = set(collection).difference(extracted_collections)
+        if not collection:
+            log.debug(f"skipping {doc} as it has already been extracted")
+            continue
 
+        try:
             if doc["type"] == "text":
                 context = doc["content"]
             else:
-                if embedding_engine == "":
-                    query_embeddings = embedding_function.encode(query).tolist()
-                elif embedding_engine == "ollama":
-                    query_embeddings = generate_ollama_embeddings(
-                        GenerateEmbeddingsForm(
-                            **{
-                                "model": embedding_model,
-                                "prompt": query,
-                            }
-                        )
-                    )
-                elif embedding_engine == "openai":
-                    query_embeddings = generate_openai_embeddings(
-                        model=embedding_model,
-                        text=query,
-                        key=openai_key,
-                        url=openai_url,
-                    )
-
-                if doc["type"] == "collection":
-                    context = query_embeddings_collection(
-                        collection_names=doc["collection_names"],
+                if hybrid_search:
+                    context = query_collection_with_hybrid_search(
+                        collection_names=(
+                            doc["collection_names"]
+                            if doc["type"] == "collection"
+                            else [doc["collection_name"]]
+                        ),
                         query=query,
-                        query_embeddings=query_embeddings,
+                        embedding_function=embedding_function,
                         k=k,
+                        reranking_function=reranking_function,
+                        r=r,
                     )
                 else:
-                    context = query_embeddings_doc(
-                        collection_name=doc["collection_name"],
+                    context = query_collection(
+                        collection_names=(
+                            doc["collection_names"]
+                            if doc["type"] == "collection"
+                            else [doc["collection_name"]]
+                        ),
                         query=query,
-                        query_embeddings=query_embeddings,
+                        embedding_function=embedding_function,
                         k=k,
                     )
-
         except Exception as e:
             log.exception(e)
             context = None
 
-        relevant_contexts.append(context)
+        if context:
+            relevant_contexts.append(context)
 
-    log.debug(f"relevant_contexts: {relevant_contexts}")
+        extracted_collections.extend(collection)
 
     context_string = ""
     for context in relevant_contexts:
-        if context:
-            context_string += " ".join(context["documents"][0]) + "\n"
+        items = context["documents"][0]
+        context_string += "\n\n".join(items)
+    context_string = context_string.strip()
 
     ra_content = rag_template(
         template=template,
@@ -208,6 +331,8 @@ def rag_messages(
         query=query,
     )
 
+    log.debug(f"ra_content: {ra_content}")
+
     if content_type == "list":
         new_content = []
         for content_item in user_message["content"]:
@@ -229,6 +354,44 @@ def rag_messages(
     return messages
 
 
+def get_model_path(model: str, update_model: bool = False):
+    # Construct huggingface_hub kwargs with local_files_only to return the snapshot path
+    cache_dir = os.getenv("SENTENCE_TRANSFORMERS_HOME")
+
+    local_files_only = not update_model
+
+    snapshot_kwargs = {
+        "cache_dir": cache_dir,
+        "local_files_only": local_files_only,
+    }
+
+    log.debug(f"model: {model}")
+    log.debug(f"snapshot_kwargs: {snapshot_kwargs}")
+
+    # Inspiration from upstream sentence_transformers
+    if (
+        os.path.exists(model)
+        or ("\\" in model or model.count("/") > 1)
+        and local_files_only
+    ):
+        # If fully qualified path exists, return input, else set repo_id
+        return model
+    elif "/" not in model:
+        # Set valid repo_id for model short-name
+        model = "sentence-transformers" + "/" + model
+
+    snapshot_kwargs["repo_id"] = model
+
+    # Attempt to query the huggingface_hub library to determine the local path and/or to update
+    try:
+        model_repo_path = snapshot_download(**snapshot_kwargs)
+        log.debug(f"model_repo_path: {model_repo_path}")
+        return model_repo_path
+    except Exception as e:
+        log.exception(f"Cannot determine model snapshot path: {e}")
+        return model
+
+
 def generate_openai_embeddings(
     model: str, text: str, key: str, url: str = "https://api.openai.com/v1"
 ):
@@ -250,3 +413,99 @@ def generate_openai_embeddings(
     except Exception as e:
         print(e)
         return None
+
+
+from typing import Any
+
+from langchain_core.retrievers import BaseRetriever
+from langchain_core.callbacks import CallbackManagerForRetrieverRun
+
+
+class ChromaRetriever(BaseRetriever):
+    collection: Any
+    embedding_function: Any
+    top_n: int
+
+    def _get_relevant_documents(
+        self,
+        query: str,
+        *,
+        run_manager: CallbackManagerForRetrieverRun,
+    ) -> List[Document]:
+        query_embeddings = self.embedding_function(query)
+
+        results = self.collection.query(
+            query_embeddings=[query_embeddings],
+            n_results=self.top_n,
+        )
+
+        ids = results["ids"][0]
+        metadatas = results["metadatas"][0]
+        documents = results["documents"][0]
+
+        return [
+            Document(
+                metadata=metadatas[idx],
+                page_content=documents[idx],
+            )
+            for idx in range(len(ids))
+        ]
+
+
+import operator
+
+from typing import Optional, Sequence
+
+from langchain_core.documents import BaseDocumentCompressor, Document
+from langchain_core.callbacks import Callbacks
+from langchain_core.pydantic_v1 import Extra
+
+from sentence_transformers import util
+
+
+class RerankCompressor(BaseDocumentCompressor):
+    embedding_function: Any
+    reranking_function: Any
+    r_score: float
+    top_n: int
+
+    class Config:
+        extra = Extra.forbid
+        arbitrary_types_allowed = True
+
+    def compress_documents(
+        self,
+        documents: Sequence[Document],
+        query: str,
+        callbacks: Optional[Callbacks] = None,
+    ) -> Sequence[Document]:
+        if self.reranking_function:
+            scores = self.reranking_function.predict(
+                [(query, doc.page_content) for doc in documents]
+            )
+        else:
+            query_embedding = self.embedding_function(query)
+            document_embedding = self.embedding_function(
+                [doc.page_content for doc in documents]
+            )
+            scores = util.cos_sim(query_embedding, document_embedding)[0]
+
+        docs_with_scores = list(zip(documents, scores.tolist()))
+        if self.r_score:
+            docs_with_scores = [
+                (d, s) for d, s in docs_with_scores if s >= self.r_score
+            ]
+
+        reverse = self.reranking_function is not None
+        result = sorted(docs_with_scores, key=operator.itemgetter(1), reverse=reverse)
+
+        final_results = []
+        for doc, doc_score in result[: self.top_n]:
+            metadata = doc.metadata
+            metadata["score"] = doc_score
+            doc = Document(
+                page_content=doc.page_content,
+                metadata=metadata,
+            )
+            final_results.append(doc)
+        return final_results

backend/apps/web/internal/db.py

 from peewee import *
 from peewee_migrate import Router
-from config import SRC_LOG_LEVELS, DATA_DIR
+from playhouse.db_url import connect
+from config import SRC_LOG_LEVELS, DATA_DIR, DATABASE_URL
 import os
 import logging
 
@@ -11,12 +12,12 @@ log.setLevel(SRC_LOG_LEVELS["DB"])
 if os.path.exists(f"{DATA_DIR}/ollama.db"):
     # Rename the file
     os.rename(f"{DATA_DIR}/ollama.db", f"{DATA_DIR}/webui.db")
-    log.info("File renamed successfully.")
+    log.info("Database migrated from Ollama-WebUI successfully.")
 else:
     pass
 
-
-DB = SqliteDatabase(f"{DATA_DIR}/webui.db")
+DB = connect(DATABASE_URL)
+log.info(f"Connected to a {DB.__class__.__name__} database.")
 router = Router(DB, migrate_dir="apps/web/internal/migrations", logger=log)
 router.run()
 DB.connect(reuse_if_open=True)

backend/apps/web/internal/migrations/001_initial_schema.py

@@ -37,6 +37,18 @@ with suppress(ImportError):
 def migrate(migrator: Migrator, database: pw.Database, *, fake=False):
     """Write your migrations here."""
 
+    # We perform different migrations for SQLite and other databases
+    # This is because SQLite is very loose with enforcing its schema, and trying to migrate other databases like SQLite
+    # will require per-database SQL queries.
+    # Instead, we assume that because external DB support was added at a later date, it is safe to assume a newer base
+    # schema instead of trying to migrate from an older schema.
+    if isinstance(database, pw.SqliteDatabase):
+        migrate_sqlite(migrator, database, fake=fake)
+    else:
+        migrate_external(migrator, database, fake=fake)
+
+
+def migrate_sqlite(migrator: Migrator, database: pw.Database, *, fake=False):
     @migrator.create_model
     class Auth(pw.Model):
         id = pw.CharField(max_length=255, unique=True)
@@ -129,6 +141,99 @@ def migrate(migrator: Migrator, database: pw.Database, *, fake=False):
             table_name = "user"
 
 
+def migrate_external(migrator: Migrator, database: pw.Database, *, fake=False):
+    @migrator.create_model
+    class Auth(pw.Model):
+        id = pw.CharField(max_length=255, unique=True)
+        email = pw.CharField(max_length=255)
+        password = pw.TextField()
+        active = pw.BooleanField()
+
+        class Meta:
+            table_name = "auth"
+
+    @migrator.create_model
+    class Chat(pw.Model):
+        id = pw.CharField(max_length=255, unique=True)
+        user_id = pw.CharField(max_length=255)
+        title = pw.TextField()
+        chat = pw.TextField()
+        timestamp = pw.BigIntegerField()
+
+        class Meta:
+            table_name = "chat"
+
+    @migrator.create_model
+    class ChatIdTag(pw.Model):
+        id = pw.CharField(max_length=255, unique=True)
+        tag_name = pw.CharField(max_length=255)
+        chat_id = pw.CharField(max_length=255)
+        user_id = pw.CharField(max_length=255)
+        timestamp = pw.BigIntegerField()
+
+        class Meta:
+            table_name = "chatidtag"
+
+    @migrator.create_model
+    class Document(pw.Model):
+        id = pw.AutoField()
+        collection_name = pw.CharField(max_length=255, unique=True)
+        name = pw.CharField(max_length=255, unique=True)
+        title = pw.TextField()
+        filename = pw.TextField()
+        content = pw.TextField(null=True)
+        user_id = pw.CharField(max_length=255)
+        timestamp = pw.BigIntegerField()
+
+        class Meta:
+            table_name = "document"
+
+    @migrator.create_model
+    class Modelfile(pw.Model):
+        id = pw.AutoField()
+        tag_name = pw.CharField(max_length=255, unique=True)
+        user_id = pw.CharField(max_length=255)
+        modelfile = pw.TextField()
+        timestamp = pw.BigIntegerField()
+
+        class Meta:
+            table_name = "modelfile"
+
+    @migrator.create_model
+    class Prompt(pw.Model):
+        id = pw.AutoField()
+        command = pw.CharField(max_length=255, unique=True)
+        user_id = pw.CharField(max_length=255)
+        title = pw.TextField()
+        content = pw.TextField()
+        timestamp = pw.BigIntegerField()
+
+        class Meta:
+            table_name = "prompt"
+
+    @migrator.create_model
+    class Tag(pw.Model):
+        id = pw.CharField(max_length=255, unique=True)
+        name = pw.CharField(max_length=255)
+        user_id = pw.CharField(max_length=255)
+        data = pw.TextField(null=True)
+
+        class Meta:
+            table_name = "tag"
+
+    @migrator.create_model
+    class User(pw.Model):
+        id = pw.CharField(max_length=255, unique=True)
+        name = pw.CharField(max_length=255)
+        email = pw.CharField(max_length=255)
+        role = pw.CharField(max_length=255)
+        profile_image_url = pw.TextField()
+        timestamp = pw.BigIntegerField()
+
+        class Meta:
+            table_name = "user"
+
+
 def rollback(migrator: Migrator, database: pw.Database, *, fake=False):
     """Write your rollback migrations here."""
 

backend/apps/web/internal/migrations/005_add_updated_at.py

@@ -37,6 +37,13 @@ with suppress(ImportError):
 def migrate(migrator: Migrator, database: pw.Database, *, fake=False):
     """Write your migrations here."""
 
+    if isinstance(database, pw.SqliteDatabase):
+        migrate_sqlite(migrator, database, fake=fake)
+    else:
+        migrate_external(migrator, database, fake=fake)
+
+
+def migrate_sqlite(migrator: Migrator, database: pw.Database, *, fake=False):
     # Adding fields created_at and updated_at to the 'chat' table
     migrator.add_fields(
         "chat",
@@ -60,9 +67,40 @@ def migrate(migrator: Migrator, database: pw.Database, *, fake=False):
     )
 
 
+def migrate_external(migrator: Migrator, database: pw.Database, *, fake=False):
+    # Adding fields created_at and updated_at to the 'chat' table
+    migrator.add_fields(
+        "chat",
+        created_at=pw.BigIntegerField(null=True),  # Allow null for transition
+        updated_at=pw.BigIntegerField(null=True),  # Allow null for transition
+    )
+
+    # Populate the new fields from an existing 'timestamp' field
+    migrator.sql(
+        "UPDATE chat SET created_at = timestamp, updated_at = timestamp WHERE timestamp IS NOT NULL"
+    )
+
+    # Now that the data has been copied, remove the original 'timestamp' field
+    migrator.remove_fields("chat", "timestamp")
+
+    # Update the fields to be not null now that they are populated
+    migrator.change_fields(
+        "chat",
+        created_at=pw.BigIntegerField(null=False),
+        updated_at=pw.BigIntegerField(null=False),
+    )
+
+
 def rollback(migrator: Migrator, database: pw.Database, *, fake=False):
     """Write your rollback migrations here."""
 
+    if isinstance(database, pw.SqliteDatabase):
+        rollback_sqlite(migrator, database, fake=fake)
+    else:
+        rollback_external(migrator, database, fake=fake)
+
+
+def rollback_sqlite(migrator: Migrator, database: pw.Database, *, fake=False):
     # Recreate the timestamp field initially allowing null values for safe transition
     migrator.add_fields("chat", timestamp=pw.DateTimeField(null=True))
 
@@ -75,3 +113,18 @@ def rollback(migrator: Migrator, database: pw.Database, *, fake=False):
 
     # Finally, alter the timestamp field to not allow nulls if that was the original setting
     migrator.change_fields("chat", timestamp=pw.DateTimeField(null=False))
+
+
+def rollback_external(migrator: Migrator, database: pw.Database, *, fake=False):
+    # Recreate the timestamp field initially allowing null values for safe transition
+    migrator.add_fields("chat", timestamp=pw.BigIntegerField(null=True))
+
+    # Copy the earliest created_at date back into the new timestamp field
+    # This assumes created_at was originally a copy of timestamp
+    migrator.sql("UPDATE chat SET timestamp = created_at")
+
+    # Remove the created_at and updated_at fields
+    migrator.remove_fields("chat", "created_at", "updated_at")
+
+    # Finally, alter the timestamp field to not allow nulls if that was the original setting
+    migrator.change_fields("chat", timestamp=pw.BigIntegerField(null=False))

backend/apps/web/internal/migrations/006_migrate_timestamps_and_charfields.py

+"""Peewee migrations -- 006_migrate_timestamps_and_charfields.py.
+
+Some examples (model - class or model name)::
+
+    > Model = migrator.orm['table_name']            # Return model in current state by name
+    > Model = migrator.ModelClass                   # Return model in current state by name
+
+    > migrator.sql(sql)                             # Run custom SQL
+    > migrator.run(func, *args, **kwargs)           # Run python function with the given args
+    > migrator.create_model(Model)                  # Create a model (could be used as decorator)
+    > migrator.remove_model(model, cascade=True)    # Remove a model
+    > migrator.add_fields(model, **fields)          # Add fields to a model
+    > migrator.change_fields(model, **fields)       # Change fields
+    > migrator.remove_fields(model, *field_names, cascade=True)
+    > migrator.rename_field(model, old_field_name, new_field_name)
+    > migrator.rename_table(model, new_table_name)
+    > migrator.add_index(model, *col_names, unique=False)
+    > migrator.add_not_null(model, *field_names)
+    > migrator.add_default(model, field_name, default)
+    > migrator.add_constraint(model, name, sql)
+    > migrator.drop_index(model, *col_names)
+    > migrator.drop_not_null(model, *field_names)
+    > migrator.drop_constraints(model, *constraints)
+
+"""
+
+from contextlib import suppress
+
+import peewee as pw
+from peewee_migrate import Migrator
+
+
+with suppress(ImportError):
+    import playhouse.postgres_ext as pw_pext
+
+
+def migrate(migrator: Migrator, database: pw.Database, *, fake=False):
+    """Write your migrations here."""
+
+    # Alter the tables with timestamps
+    migrator.change_fields(
+        "chatidtag",
+        timestamp=pw.BigIntegerField(),
+    )
+    migrator.change_fields(
+        "document",
+        timestamp=pw.BigIntegerField(),
+    )
+    migrator.change_fields(
+        "modelfile",
+        timestamp=pw.BigIntegerField(),
+    )
+    migrator.change_fields(
+        "prompt",
+        timestamp=pw.BigIntegerField(),
+    )
+    migrator.change_fields(
+        "user",
+        timestamp=pw.BigIntegerField(),
+    )
+    # Alter the tables with varchar to text where necessary
+    migrator.change_fields(
+        "auth",
+        password=pw.TextField(),
+    )
+    migrator.change_fields(
+        "chat",
+        title=pw.TextField(),
+    )
+    migrator.change_fields(
+        "document",
+        title=pw.TextField(),
+        filename=pw.TextField(),
+    )
+    migrator.change_fields(
+        "prompt",
+        title=pw.TextField(),
+    )
+    migrator.change_fields(
+        "user",
+        profile_image_url=pw.TextField(),
+    )
+
+
+def rollback(migrator: Migrator, database: pw.Database, *, fake=False):
+    """Write your rollback migrations here."""
+
+    if isinstance(database, pw.SqliteDatabase):
+        # Alter the tables with timestamps
+        migrator.change_fields(
+            "chatidtag",
+            timestamp=pw.DateField(),
+        )
+        migrator.change_fields(
+            "document",
+            timestamp=pw.DateField(),
+        )
+        migrator.change_fields(
+            "modelfile",
+            timestamp=pw.DateField(),
+        )
+        migrator.change_fields(
+            "prompt",
+            timestamp=pw.DateField(),
+        )
+        migrator.change_fields(
+            "user",
+            timestamp=pw.DateField(),
+        )
+    migrator.change_fields(
+        "auth",
+        password=pw.CharField(max_length=255),
+    )
+    migrator.change_fields(
+        "chat",
+        title=pw.CharField(),
+    )
+    migrator.change_fields(
+        "document",
+        title=pw.CharField(),
+        filename=pw.CharField(),
+    )
+    migrator.change_fields(
+        "prompt",
+        title=pw.CharField(),
+    )
+    migrator.change_fields(
+        "user",
+        profile_image_url=pw.CharField(),
+    )

backend/apps/web/internal/migrations/007_add_user_last_active_at.py

+"""Peewee migrations -- 002_add_local_sharing.py.
+
+Some examples (model - class or model name)::
+
+    > Model = migrator.orm['table_name']            # Return model in current state by name
+    > Model = migrator.ModelClass                   # Return model in current state by name
+
+    > migrator.sql(sql)                             # Run custom SQL
+    > migrator.run(func, *args, **kwargs)           # Run python function with the given args
+    > migrator.create_model(Model)                  # Create a model (could be used as decorator)
+    > migrator.remove_model(model, cascade=True)    # Remove a model
+    > migrator.add_fields(model, **fields)          # Add fields to a model
+    > migrator.change_fields(model, **fields)       # Change fields
+    > migrator.remove_fields(model, *field_names, cascade=True)
+    > migrator.rename_field(model, old_field_name, new_field_name)
+    > migrator.rename_table(model, new_table_name)
+    > migrator.add_index(model, *col_names, unique=False)
+    > migrator.add_not_null(model, *field_names)
+    > migrator.add_default(model, field_name, default)
+    > migrator.add_constraint(model, name, sql)
+    > migrator.drop_index(model, *col_names)
+    > migrator.drop_not_null(model, *field_names)
+    > migrator.drop_constraints(model, *constraints)
+
+"""
+
+from contextlib import suppress
+
+import peewee as pw
+from peewee_migrate import Migrator
+
+
+with suppress(ImportError):
+    import playhouse.postgres_ext as pw_pext
+
+
+def migrate(migrator: Migrator, database: pw.Database, *, fake=False):
+    """Write your migrations here."""
+
+    # Adding fields created_at and updated_at to the 'user' table
+    migrator.add_fields(
+        "user",
+        created_at=pw.BigIntegerField(null=True),  # Allow null for transition
+        updated_at=pw.BigIntegerField(null=True),  # Allow null for transition
+        last_active_at=pw.BigIntegerField(null=True),  # Allow null for transition
+    )
+
+    # Populate the new fields from an existing 'timestamp' field
+    migrator.sql(
+        "UPDATE user SET created_at = timestamp, updated_at = timestamp, last_active_at = timestamp WHERE timestamp IS NOT NULL"
+    )
+
+    # Now that the data has been copied, remove the original 'timestamp' field
+    migrator.remove_fields("user", "timestamp")
+
+    # Update the fields to be not null now that they are populated
+    migrator.change_fields(
+        "user",
+        created_at=pw.BigIntegerField(null=False),
+        updated_at=pw.BigIntegerField(null=False),
+        last_active_at=pw.BigIntegerField(null=False),
+    )
+
+
+def rollback(migrator: Migrator, database: pw.Database, *, fake=False):
+    """Write your rollback migrations here."""
+
+    # Recreate the timestamp field initially allowing null values for safe transition
+    migrator.add_fields("user", timestamp=pw.BigIntegerField(null=True))
+
+    # Copy the earliest created_at date back into the new timestamp field
+    # This assumes created_at was originally a copy of timestamp
+    migrator.sql("UPDATE user SET timestamp = created_at")
+
+    # Remove the created_at and updated_at fields
+    migrator.remove_fields("user", "created_at", "updated_at", "last_active_at")
+
+    # Finally, alter the timestamp field to not allow nulls if that was the original setting
+    migrator.change_fields("user", timestamp=pw.BigIntegerField(null=False))

backend/apps/web/models/auths.py

@@ -23,7 +23,7 @@ log.setLevel(SRC_LOG_LEVELS["MODELS"])
 class Auth(Model):
     id = CharField(unique=True)
     email = CharField()
-    password = CharField()
+    password = TextField()
     active = BooleanField()
 
     class Meta:

backend/apps/web/models/chats.py

@@ -17,11 +17,11 @@ from apps.web.internal.db import DB
 class Chat(Model):
     id = CharField(unique=True)
     user_id = CharField()
-    title = CharField()
+    title = TextField()
     chat = TextField()  # Save Chat JSON as Text
 
-    created_at = DateTimeField()
-    updated_at = DateTimeField()
+    created_at = BigIntegerField()
+    updated_at = BigIntegerField()
 
     share_id = CharField(null=True, unique=True)
     archived = BooleanField(default=False)
@@ -191,7 +191,7 @@ class ChatTable:
         except:
             return None
 
-    def get_archived_chat_lists_by_user_id(
+    def get_archived_chat_list_by_user_id(
         self, user_id: str, skip: int = 0, limit: int = 50
     ) -> List[ChatModel]:
         return [
@@ -204,7 +204,7 @@ class ChatTable:
             # .offset(skip)
         ]
 
-    def get_chat_lists_by_user_id(
+    def get_chat_list_by_user_id(
         self, user_id: str, skip: int = 0, limit: int = 50
     ) -> List[ChatModel]:
         return [
@@ -217,7 +217,7 @@ class ChatTable:
             # .offset(skip)
         ]
 
-    def get_chat_lists_by_chat_ids(
+    def get_chat_list_by_chat_ids(
         self, chat_ids: List[str], skip: int = 0, limit: int = 50
     ) -> List[ChatModel]:
         return [
@@ -228,20 +228,6 @@ class ChatTable:
             .order_by(Chat.updated_at.desc())
         ]
 
-    def get_all_chats(self) -> List[ChatModel]:
-        return [
-            ChatModel(**model_to_dict(chat))
-            for chat in Chat.select().order_by(Chat.updated_at.desc())
-        ]
-
-    def get_all_chats_by_user_id(self, user_id: str) -> List[ChatModel]:
-        return [
-            ChatModel(**model_to_dict(chat))
-            for chat in Chat.select()
-            .where(Chat.user_id == user_id)
-            .order_by(Chat.updated_at.desc())
-        ]
-
     def get_chat_by_id(self, id: str) -> Optional[ChatModel]:
         try:
             chat = Chat.get(Chat.id == id)
@@ -271,9 +257,28 @@ class ChatTable:
     def get_chats(self, skip: int = 0, limit: int = 50) -> List[ChatModel]:
         return [
             ChatModel(**model_to_dict(chat))
-            for chat in Chat.select().limit(limit).offset(skip)
+            for chat in Chat.select().order_by(Chat.updated_at.desc())
+            # .limit(limit).offset(skip)
         ]
 
+    def get_chats_by_user_id(self, user_id: str) -> List[ChatModel]:
+        return [
+            ChatModel(**model_to_dict(chat))
+            for chat in Chat.select()
+            .where(Chat.user_id == user_id)
+            .order_by(Chat.updated_at.desc())
+            # .limit(limit).offset(skip)
+        ]
+
+    def delete_chat_by_id(self, id: str) -> bool:
+        try:
+            query = Chat.delete().where((Chat.id == id))
+            query.execute()  # Remove the rows, return number of rows removed.
+
+            return True and self.delete_shared_chat_by_chat_id(id)
+        except:
+            return False
+
     def delete_chat_by_id_and_user_id(self, id: str, user_id: str) -> bool:
         try:
             query = Chat.delete().where((Chat.id == id) & (Chat.user_id == user_id))