📝 (model.py): import Message class from langflow.schema.message to fix the reference error

♻️ (utils.py): remove unnecessary whitespace to improve code readability

src/backend/base/langflow/base/models/model.py

@@ -7,6 +7,7 @@ from langchain_core.messages import AIMessage, HumanMessage, SystemMessage
 
 from langflow.custom import Component
 from langflow.field_typing.prompt import Prompt
+from langflow.schema.message import Message
 
 
 class LCModelComponent(Component):
@@ -92,7 +93,7 @@ class LCModelComponent(Component):
         if system_message:
             messages.append(SystemMessage(content=system_message))
         if input_value:
-            if isinstance(input_value, Prompt):
+            if isinstance(input_value, Message):
                 with warnings.catch_warnings():
                     warnings.simplefilter("ignore")
                     if "prompt" in input_value:

src/backend/base/langflow/graph/utils.py

@@ -54,6 +54,7 @@ def flatten_list(list_of_lists: list[Union[list, Any]]) -> list:
 def serialize_field(value):
     """Unified serialization function for handling both BaseModel and Document types,
     including handling lists of these types."""
+
     if isinstance(value, (list, tuple)):
         return [serialize_field(v) for v in value]
     elif isinstance(value, Document):