Method bulk_update

django/db/migrations/state.py:666–675

(self)

    @contextmanager
    def bulk_update(self):
        # Avoid clearing each model's cache for each change. Instead, clear
        # all caches when we're finished updating the model instances.
        ready = self.ready
        self.ready = False
        try:
            yield
        finally:
            self.ready = ready
            self.clear_cache()

    def render_multiple(self, model_states):
        # We keep trying to render the models in a loop, ignoring invalid