fix update dataset failed when embedding model is not exist (#6920)

api/services/dataset_service.py

@@ -197,6 +197,28 @@ class DatasetService:
                     f"{ex.description}"
                 )
 
+    @staticmethod
+    def check_embedding_model_setting(tenant_id: str, embedding_model_provider: str, embedding_model:str):
+        try:
+            model_manager = ModelManager()
+            model_manager.get_model_instance(
+                tenant_id=tenant_id,
+                provider=embedding_model_provider,
+                model_type=ModelType.TEXT_EMBEDDING,
+                model=embedding_model
+            )
+        except LLMBadRequestError:
+            raise ValueError(
+                "No Embedding Model available. Please configure a valid provider "
+                "in the Settings -> Model Provider."
+            )
+        except ProviderTokenNotInitError as ex:
+            raise ValueError(
+                f"The dataset in unavailable, due to: "
+                f"{ex.description}"
+            )
+
+
     @staticmethod
     def update_dataset(dataset_id, data, user):
         data.pop('partial_member_list', None)