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[PR #28068] fix: variable assigner can't assign float number #31938

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opened 2026-02-21 20:50:26 -05:00 by yindo · 0 comments
yindo commented 2026-02-21 20:50:26 -05:00
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Original Pull Request: https://github.com/langgenius/dify/pull/28068

State: closed
Merged: Yes

Important

  1. Make sure you have read our contribution guidelines
  2. Ensure there is an associated issue and you have been assigned to it
  3. Use the correct syntax to link this PR: Fixes #<issue number>.

Summary

fix https://github.com/langgenius/dify/issues/28030

error log:

2025-11-11 01:07:06,630 INFO [debug_logging.py:164]  ✅ Node succeeded: 1762822713123
Debugging middleware caught exception in streamed response at a point where response headers were already sent.
Traceback (most recent call last):
  File "/root/dify/api/.venv/lib/python3.12/site-packages/werkzeug/wsgi.py", line 256, in __next__
    return self._next()
           ^^^^^^^^^^^^
  File "/root/dify/api/.venv/lib/python3.12/site-packages/werkzeug/wrappers/response.py", line 32, in _iter_encoded
    for item in iterable:
  File "/root/dify/api/.venv/lib/python3.12/site-packages/flask/helpers.py", line 132, in generator
    yield from gen
  File "/root/dify/api/libs/helper.py", line 209, in generate
    yield from response
  File "/root/dify/api/core/app/features/rate_limiting/rate_limit.py", line 120, in __next__
    return next(self.generator)
           ^^^^^^^^^^^^^^^^^^^^
  File "/root/dify/api/core/app/apps/base_app_generator.py", line 176, in gen
    for message in generator:
  File "/root/dify/api/core/app/apps/base_app_generate_response_converter.py", line 27, in _generate_full_response
    yield from cls.convert_stream_full_response(response)
  File "/root/dify/api/core/app/apps/advanced_chat/generate_response_converter.py", line 66, in convert_stream_full_response
    for chunk in stream_response:
  File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 202, in _to_stream_response
    for stream_response in generator:
  File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 235, in _wrapper_process_stream_response
    for response in self._process_stream_response(tts_publisher=tts_publisher, trace_manager=trace_manager):
  File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 757, in _process_stream_response
    if responses := list(
                    ^^^^^
  File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 699, in _dispatch_event
    yield from handler(
  File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 356, in _handle_node_succeeded_event
    self._save_output_for_event(event, event.node_execution_id)
  File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 891, in _save_output_for_event
    saver.save(event.process_data, event.outputs)
  File "/root/dify/api/services/workflow_draft_variable_service.py", line 1028, in save
    draft_vars = self._build_from_variable_assigner_mapping(process_data=process_data)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/dify/api/services/workflow_draft_variable_service.py", line 811, in _build_from_variable_assigner_mapping
    segment = WorkflowDraftVariable.build_segment_with_type(segment_type=item.value_type, value=item.new_value)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/dify/api/models/workflow.py", line 1376, in build_segment_with_type
    return build_segment_with_type(segment_type=segment_type, value=value)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/dify/api/factories/variable_factory.py", line 278, in build_segment_with_type
    raise TypeMismatchError(f"Type mismatch: expected {segment_type}, but got {inferred_type}, value={value}")
factories.variable_factory.TypeMismatchError: Type mismatch: expected integer, but got float, value=111.1

Screenshots

Before After
... ...

Checklist

  • This change requires a documentation update, included: Dify Document
  • I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
  • I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
  • I've updated the documentation accordingly.
  • I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods
**Original Pull Request:** https://github.com/langgenius/dify/pull/28068 **State:** closed **Merged:** Yes --- > [!IMPORTANT] > > 1. Make sure you have read our [contribution guidelines](https://github.com/langgenius/dify/blob/main/CONTRIBUTING.md) > 1. Ensure there is an associated issue and you have been assigned to it > 1. Use the correct syntax to link this PR: `Fixes #<issue number>`. ## Summary fix https://github.com/langgenius/dify/issues/28030 error log: ``` 2025-11-11 01:07:06,630 INFO [debug_logging.py:164] ✅ Node succeeded: 1762822713123 Debugging middleware caught exception in streamed response at a point where response headers were already sent. Traceback (most recent call last): File "/root/dify/api/.venv/lib/python3.12/site-packages/werkzeug/wsgi.py", line 256, in __next__ return self._next() ^^^^^^^^^^^^ File "/root/dify/api/.venv/lib/python3.12/site-packages/werkzeug/wrappers/response.py", line 32, in _iter_encoded for item in iterable: File "/root/dify/api/.venv/lib/python3.12/site-packages/flask/helpers.py", line 132, in generator yield from gen File "/root/dify/api/libs/helper.py", line 209, in generate yield from response File "/root/dify/api/core/app/features/rate_limiting/rate_limit.py", line 120, in __next__ return next(self.generator) ^^^^^^^^^^^^^^^^^^^^ File "/root/dify/api/core/app/apps/base_app_generator.py", line 176, in gen for message in generator: File "/root/dify/api/core/app/apps/base_app_generate_response_converter.py", line 27, in _generate_full_response yield from cls.convert_stream_full_response(response) File "/root/dify/api/core/app/apps/advanced_chat/generate_response_converter.py", line 66, in convert_stream_full_response for chunk in stream_response: File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 202, in _to_stream_response for stream_response in generator: File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 235, in _wrapper_process_stream_response for response in self._process_stream_response(tts_publisher=tts_publisher, trace_manager=trace_manager): File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 757, in _process_stream_response if responses := list( ^^^^^ File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 699, in _dispatch_event yield from handler( File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 356, in _handle_node_succeeded_event self._save_output_for_event(event, event.node_execution_id) File "/root/dify/api/core/app/apps/advanced_chat/generate_task_pipeline.py", line 891, in _save_output_for_event saver.save(event.process_data, event.outputs) File "/root/dify/api/services/workflow_draft_variable_service.py", line 1028, in save draft_vars = self._build_from_variable_assigner_mapping(process_data=process_data) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/root/dify/api/services/workflow_draft_variable_service.py", line 811, in _build_from_variable_assigner_mapping segment = WorkflowDraftVariable.build_segment_with_type(segment_type=item.value_type, value=item.new_value) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/root/dify/api/models/workflow.py", line 1376, in build_segment_with_type return build_segment_with_type(segment_type=segment_type, value=value) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/root/dify/api/factories/variable_factory.py", line 278, in build_segment_with_type raise TypeMismatchError(f"Type mismatch: expected {segment_type}, but got {inferred_type}, value={value}") factories.variable_factory.TypeMismatchError: Type mismatch: expected integer, but got float, value=111.1 ``` ## Screenshots | Before | After | |--------|-------| | ... | ... | ## Checklist - [ ] This change requires a documentation update, included: [Dify Document](https://github.com/langgenius/dify-docs) - [x] I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!) - [x] I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change. - [x] I've updated the documentation accordingly. - [x] I ran `dev/reformat`(backend) and `cd web && npx lint-staged`(frontend) to appease the lint gods
yindo added the pull-request label 2026-02-21 20:50:26 -05:00
yindo closed this issue 2026-02-21 20:50:26 -05:00
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Reference: langgenius/dify#31938
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