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Fix UnboundLocalError error in _replace_field_names_case_insensitively #639

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Jun 23, 2025
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Fix UnboundLocalError error in _replace_field_names_case_insensitively #639

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1 change: 1 addition & 0 deletions pydantic_settings/sources/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -416,6 +416,7 @@ class Settings(BaseSettings):
model_fields: dict[str, FieldInfo] = annotation.model_fields

# Find field in sub model by looking in fields case insensitively
field_key: str | None = None
for sub_model_field_name, sub_model_field in model_fields.items():
aliases, _ = _get_alias_names(sub_model_field_name, sub_model_field)
_search = (alias for alias in aliases if alias.lower() == name.lower())
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