Add Camembert to models exportable with ONNX (#14059)

Add Camembert to models exportable with ONNX
Co-authored-by: Thomas.Chaigneau <thomas.chaigneau@arkea.com>
Co-authored-by: Michael Benayoun <mickbenayoun@gmail.com>

docs/source/serialization.rst

@@ -43,6 +43,7 @@ Ready-made configurations include the following models:
 - ALBERT
 - BART
 - BERT
+- CamemBERT
 - DistilBERT
 - GPT Neo
 - LayoutLM

src/transformers/models/camembert/__init__.py

@@ -28,7 +28,7 @@ from ...file_utils import (
 
 
 _import_structure = {
-    "configuration_camembert": ["CAMEMBERT_PRETRAINED_CONFIG_ARCHIVE_MAP", "CamembertConfig"],
+    "configuration_camembert": ["CAMEMBERT_PRETRAINED_CONFIG_ARCHIVE_MAP", "CamembertConfig", "CamembertOnnxConfig"],
 }
 
 if is_sentencepiece_available():
@@ -62,7 +62,7 @@ if is_tf_available():
 
 
 if TYPE_CHECKING:
-    from .configuration_camembert import CAMEMBERT_PRETRAINED_CONFIG_ARCHIVE_MAP, CamembertConfig
+    from .configuration_camembert import CAMEMBERT_PRETRAINED_CONFIG_ARCHIVE_MAP, CamembertConfig, CamembertOnnxConfig
 
     if is_sentencepiece_available():
         from .tokenization_camembert import CamembertTokenizer

src/transformers/models/camembert/configuration_camembert.py

@@ -15,6 +15,10 @@
 # limitations under the License.
 """ CamemBERT configuration """
 
+from collections import OrderedDict
+from typing import Mapping
+
+from ...onnx import OnnxConfig
 from ...utils import logging
 from ..roberta.configuration_roberta import RobertaConfig
 
@@ -35,3 +39,14 @@ class CamembertConfig(RobertaConfig):
     """
 
     model_type = "camembert"
+
+
+class CamembertOnnxConfig(OnnxConfig):
+    @property
+    def inputs(self) -> Mapping[str, Mapping[int, str]]:
+        return OrderedDict(
+            [
+                ("input_ids", {0: "batch", 1: "sequence"}),
+                ("attention_mask", {0: "batch", 1: "sequence"}),
+            ]
+        )

src/transformers/onnx/features.py

@@ -5,6 +5,7 @@ from .. import is_torch_available
 from ..models.albert import AlbertOnnxConfig
 from ..models.bart import BartOnnxConfig
 from ..models.bert import BertOnnxConfig
+from ..models.camembert import CamembertOnnxConfig
 from ..models.distilbert import DistilBertOnnxConfig
 from ..models.gpt2 import GPT2OnnxConfig
 from ..models.gpt_neo import GPTNeoOnnxConfig
@@ -62,6 +63,14 @@ class FeaturesManager:
         "bart": supported_features_mapping("default", onnx_config_cls=BartOnnxConfig),
         "mbart": supported_features_mapping("default", onnx_config_cls=MBartOnnxConfig),
         "bert": supported_features_mapping("default", onnx_config_cls=BertOnnxConfig),
+        "camembert": supported_features_mapping(
+            "default",
+            "causal-lm",
+            "sequence-classification",
+            "token-classification",
+            "question-answering",
+            onnx_config_cls=CamembertOnnxConfig,
+        ),
         "distilbert": supported_features_mapping("default", onnx_config_cls=DistilBertOnnxConfig),
         "gpt2": supported_features_mapping("default", onnx_config_cls=GPT2OnnxConfig),
         "longformer": supported_features_mapping("default", onnx_config_cls=LongformerOnnxConfig),