dosubot[bot]
commented
2 hours ago I found a similar unsolved discussion regarding an "Invalid variable" error in the Dify repository [1].
The validation error for VariableAssignerNodeData in version 0.8.0 occurs because the VariableAssignerNode class expects the node_data to be of type VariableAssignerData. If the node_data does not conform to this expected type, it will raise a validation error. The structure and type definition of VariableAssignerData are as follows:
class VariableAssignerData(BaseNodeData):
title: str = "Variable Assigner"
desc: Optional[str] = "Assign a value to a variable"
assigned_variable_selector: Sequence[str]
write_mode: WriteMode
input_variable_selector: Sequence[str]In the _run method of VariableAssignerNode, self.node_data is cast to VariableAssignerData. If self.node_data does not match the structure and type of VariableAssignerData, it will result in a validation error [2].
Additionally, ensure that the iterator_selector and output_selector in the IterationNode are correctly configured and validated. The iterator_selector should point to a valid list in the VariablePool, and the data being iterated over should match the expected types [3][4].
To avoid such issues, make sure that the conversation variables are correctly defined and used within the chatflow. Conversation variables allow application developers to specify particular information that needs to be temporarily stored within the same Chatflow session, ensuring that this information can be referenced across multiple rounds of chatting within the current chatflow [5].
If you need further assistance, please provide more details about the specific configuration and data being used in your chatflow.
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yuhp-zts
Self Checks
Dify version
0.8.0
Cloud or Self Hosted
Self Hosted (Docker)
Steps to reproduce
Iteration node in chatflow:an error occurs. { "iterator_selector": [ { "company": "company 1", "tools": { "tool1": "tool 1", "tool2": "tool 2" } }, { "company": "company 2", "tools": { "tool2": "tool2" } } ] }
2024-09-25 01:42:10,831.831 ERROR [Thread-96 (_generate_worker)] [graph_engine.py:184] - Unknown Error when graph running Traceback (most recent call last): File "/app/api/core/workflow/graph_engine/graph_engine.py", line 145, in run for item in generator: File "/app/api/core/workflow/nodes/answer/answer_stream_processor.py", line 30, in process for event in generator: File "/app/api/core/workflow/graph_engine/graph_engine.py", line 233, in _run node_instance = node_cls( # type: ignore File "/app/api/core/workflow/nodes/base_node.py", line 48, in init self.node_data = self._node_data_cls(**config.get("data", {})) File "/app/api/.venv/lib/python3.10/site-packages/pydantic/main.py", line 193, in init self.__pydantic_validator__.validate_python(data, self_instance=self) pydantic_core._pydantic_core.ValidationError: 1 validation error for VariableAssignerNodeData advanced_settings.groups.0.output_type Input should be 'string', 'number', 'object', 'array[string]', 'array[number]' or 'array[object]' [type=literal_error, input_value='any', input_type=str] For further information visit https://errors.pydantic.dev/2.8/v/literal_error
✔️ Expected Behavior
No response
❌ Actual Behavior
No response