feat/enhance the multi-modal support (#8818)

api/fields/message_fields.py

@@ -3,6 +3,8 @@ from flask_restful import fields
 from fields.conversation_fields import message_file_fields
 from libs.helper import TimestampField
 
+from .raws import FilesContainedField
+
 feedback_fields = {"rating": fields.String}
 
 retriever_resource_fields = {
@@ -63,14 +65,14 @@ message_fields = {
     "id": fields.String,
     "conversation_id": fields.String,
     "parent_message_id": fields.String,
-    "inputs": fields.Raw,
+    "inputs": FilesContainedField,
     "query": fields.String,
     "answer": fields.String(attribute="re_sign_file_url_answer"),
     "feedback": fields.Nested(feedback_fields, attribute="user_feedback", allow_null=True),
     "retriever_resources": fields.List(fields.Nested(retriever_resource_fields)),
     "created_at": TimestampField,
     "agent_thoughts": fields.List(fields.Nested(agent_thought_fields)),
-    "message_files": fields.List(fields.Nested(message_file_fields), attribute="files"),
+    "message_files": fields.List(fields.Nested(message_file_fields)),
     "status": fields.String,
     "error": fields.String,
 }