fix error weaviate vector (#1058)

Co-authored-by: jyong <jyong@dify.ai>

api/commands.py

@@ -328,12 +328,19 @@ def create_qdrant_indexes():
                                 model_provider_name=dataset.embedding_model_provider,
                                 model_name=dataset.embedding_model
                             )
+                        except Exception:
+                            try:
+                                embedding_model = ModelFactory.get_embedding_model(
+                                    tenant_id=dataset.tenant_id
+                                )
+                                dataset.embedding_model = embedding_model.name
+                                dataset.embedding_model_provider = embedding_model.model_provider.provider_name
                             except Exception:
                                 provider = Provider(
                                     id='provider_id',
                                     tenant_id=dataset.tenant_id,
                                     provider_name='openai',
-                                provider_type=ProviderType.CUSTOM.value,
+                                    provider_type=ProviderType.SYSTEM.value,
                                     encrypted_config=json.dumps({'openai_api_key': 'TEST'}),
                                     is_valid=True,
                                 )