Method add_model_construct_method

pydantic/mypy.py:941–979

Adds a fully typed `model_construct` classmethod to the class. Similar to the fields-aware __init__ method, but always uses the field names (not aliases), and does not treat settings fields as optional.

(
        self,
        fields: list[PydanticModelField],
        config: ModelConfigData,
        is_settings: bool,
        is_root_model: bool,
    )

        add_method(self._api, self._cls, '__init__', args=args, return_type=NoneType())

    def add_model_construct_method(
        self,
        fields: list[PydanticModelField],
        config: ModelConfigData,
        is_settings: bool,
        is_root_model: bool,
    ) -> None:
        """Adds a fully typed `model_construct` classmethod to the class.

        Similar to the fields-aware __init__ method, but always uses the field names (not aliases),
        and does not treat settings fields as optional.
        """
        set_str = self._api.named_type(f'{BUILTINS_NAME}.set', [self._api.named_type(f'{BUILTINS_NAME}.str')])
        optional_set_str = UnionType([set_str, NoneType()])
        fields_set_argument = Argument(Var('_fields_set', optional_set_str), optional_set_str, None, ARG_OPT)
        with state.strict_optional_set(self._api.options.strict_optional):
            args = self.get_field_arguments(
                fields,
                typed=True,
                model_strict=bool(config.strict),
                requires_dynamic_aliases=False,
                use_alias=False,
                is_settings=is_settings,
                is_root_model=is_root_model,
            )
        if not self.should_init_forbid_extra(fields, config):
            var = Var('kwargs')
            args.append(Argument(var, AnyType(TypeOfAny.explicit), None, ARG_STAR2))

        args = args + [fields_set_argument] if is_root_model else [fields_set_argument] + args

        add_method(
            self._api,
            self._cls,
            'model_construct',
            args=args,
            return_type=fill_typevars(self._cls.info),
            is_classmethod=True,
        )

    def set_frozen(self, fields: list[PydanticModelField], api: SemanticAnalyzerPluginInterface, frozen: bool) -> None:
        """Marks all fields as properties so that attempts to set them trigger mypy errors.