[flux lora training] fix t5 training bug (#10845)

* fix t5 training bug

* Apply style fixes

---------
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

examples/advanced_diffusion_training/train_dreambooth_lora_flux_advanced.py

@@ -880,9 +880,7 @@ class TokenEmbeddingsHandler:
         idx_to_text_encoder_name = {0: "clip_l", 1: "t5"}
         for idx, text_encoder in enumerate(self.text_encoders):
             train_ids = self.train_ids if idx == 0 else self.train_ids_t5
-            embeds = (
-                text_encoder.text_model.embeddings.token_embedding if idx == 0 else text_encoder.encoder.embed_tokens
-            )
+            embeds = text_encoder.text_model.embeddings.token_embedding if idx == 0 else text_encoder.shared
             assert embeds.weight.data.shape[0] == len(self.tokenizers[idx]), "Tokenizers should be the same."
             new_token_embeddings = embeds.weight.data[train_ids]
 
@@ -904,9 +902,7 @@ class TokenEmbeddingsHandler:
     @torch.no_grad()
     def retract_embeddings(self):
         for idx, text_encoder in enumerate(self.text_encoders):
-            embeds = (
-                text_encoder.text_model.embeddings.token_embedding if idx == 0 else text_encoder.encoder.embed_tokens
-            )
+            embeds = text_encoder.text_model.embeddings.token_embedding if idx == 0 else text_encoder.shared
             index_no_updates = self.embeddings_settings[f"index_no_updates_{idx}"]
             embeds.weight.data[index_no_updates] = (
                 self.embeddings_settings[f"original_embeddings_{idx}"][index_no_updates]
@@ -1749,7 +1745,7 @@ def main(args):
         if args.enable_t5_ti:  # whether to do pivotal tuning/textual inversion for T5 as well
             text_lora_parameters_two = []
             for name, param in text_encoder_two.named_parameters():
-                if "token_embedding" in name:
+                if "shared" in name:
                     # ensure that dtype is float32, even if rest of the model that isn't trained is loaded in fp16
                     param.data = param.to(dtype=torch.float32)
                     param.requires_grad = True