Method for_model

pydantic/_internal/_config.py:100–149

Build a new `ConfigWrapper` instance for a `BaseModel`. The config wrapper built based on (in descending order of priority): - options from `kwargs` - options from the `namespace` - options from the base classes (`bases`) Args: bases: A tuple of

(
        cls,
        bases: tuple[type[Any], ...],
        namespace: dict[str, Any],
        raw_annotations: dict[str, Any],
        kwargs: dict[str, Any],
    )

    @classmethod
    def for_model(
        cls,
        bases: tuple[type[Any], ...],
        namespace: dict[str, Any],
        raw_annotations: dict[str, Any],
        kwargs: dict[str, Any],
    ) -> Self:
        """Build a new `ConfigWrapper` instance for a `BaseModel`.

        The config wrapper built based on (in descending order of priority):
        - options from `kwargs`
        - options from the `namespace`
        - options from the base classes (`bases`)

        Args:
            bases: A tuple of base classes.
            namespace: The namespace of the class being created.
            raw_annotations: The (non-evaluated) annotations of the model.
            kwargs: The kwargs passed to the class being created.

        Returns:
            A `ConfigWrapper` instance for `BaseModel`.
        """
        config_new = ConfigDict()
        for base in bases:
            config = getattr(base, 'model_config', None)
            if config:
                config_new.update(config.copy())

        config_class_from_namespace = namespace.get('Config')
        config_dict_from_namespace = namespace.get('model_config')

        if raw_annotations.get('model_config') and config_dict_from_namespace is None:
            raise PydanticUserError(
                '`model_config` cannot be used as a model field name. Use `model_config` for model configuration.',
                code='model-config-invalid-field-name',
            )

        if config_class_from_namespace and config_dict_from_namespace:
            raise PydanticUserError('"Config" and "model_config" cannot be used together', code='config-both')

        config_from_namespace = config_dict_from_namespace or prepare_config(config_class_from_namespace)

        config_new.update(config_from_namespace)

        for k in list(kwargs.keys()):
            if k in config_keys:
                config_new[k] = kwargs.pop(k)

        return cls(config_new)

    # we don't show `__getattr__` to type checkers so missing attributes cause errors
    if not TYPE_CHECKING:  # pragma: no branch