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UserWarning: Valid config keys have changed in V2: * 'orm_mode' has been renamed to 'from_attributes'

Not confirmed yet · posted

Cause

Pydantic 2 renamed the config key and only warns about the old one: orm_mode=True is not applied, so ORM objects then fail validation.

Fix

risk: low

+from pydantic import ConfigDict-    class Config:-        orm_mode = True+    model_config = ConfigDict(from_attributes=True)-user = UserOut.from_orm(db_user)+user = UserOut.model_validate(db_user)

Don’t try

treat it as a cosmetic warning and keep orm_mode — the key is ignored: from_orm() raises PydanticUserError (must set from_attributes=True) and model_validate(obj) fails with model_type.

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