Method state_forward

tortoise/migrations/operations.py:312–338

(self, app_label: str, state: State)

        return f"Delete model {self.name}"

    def state_forward(self, app_label: str, state: State) -> None:
        model_ref = f"{app_label}.{self.name}"

        for model_state in state.models.values():
            for field_name, field in model_state.fields.items():
                if not isinstance(field, DIRECT_RELATION_FIELDS):
                    continue

                if field.model_name == model_ref:
                    raise IncompatibleStateError(
                        f"{model_ref} is still referenced from {model_state.app}.{model_state.name}"
                    )

        model_state_to_delete = state.models.pop((app_label, self.name), None)
        if not model_state_to_delete:
            raise IncompatibleStateError()

        models_to_reload = set()

        for field in model_state_to_delete.fields.values():
            if not isinstance(field, DIRECT_RELATION_FIELDS):
                continue

            models_to_reload.add(state.apps.split_reference(field.model_name))

        state.apps.unregister_model(app_label, self.name)
        state.reload_models(models_to_reload)

    async def database_forward(
        self,