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Find @model_validator(mode='after') on a classmethod

Recipe IDorg.openrewrite.python.migrate.pydantic.FindModelValidatorAfterClassmethod

Artifactopenrewrite-migrate-python

Pydantic 2.12 deprecated @model_validator with mode='after' on a classmethod; the implicit classmethod conversion for after model validators is removed in V3. Such validators should be instance methods (self, no @classmethod). This recipe flags the decorator for review, since the rewrite is not safe to mechanize. field_validator is unaffected.

Single recipePythonpythonpydanticmigration2.12Moderne Proprietary License

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Usage

Run this recipe

In order to run Python recipes, you will need to use the Moderne CLI.

Once the CLI is installed, you can install this Python recipe package by running the following command:

Install the recipe package

mod config recipes pip install openrewrite-migrate-python==0.9.3

Then, you can run the recipe via:

Run the recipe

mod run . --recipe org.openrewrite.python.migrate.pydantic.FindModelValidatorAfterClassmethod