Method load

graphene/utils/dataloader.py:74–101

Loads a key, returning a `Future` for the value represented by that key.

(self, key=None)

        return self._loop

    def load(self, key=None):
        """
        Loads a key, returning a `Future` for the value represented by that key.
        """
        if key is None:
            raise TypeError(  # pragma: no cover
                (
                    "The loader.load() function must be called with a value, "
                    "but got: {}."
                ).format(key)
            )

        cache_key = self.get_cache_key(key)

        # If caching and there is a cache-hit, return cached Future.
        if self.cache:
            cached_result = self._cache.get(cache_key)
            if cached_result:
                return cached_result

        # Otherwise, produce a new Future for this value.
        future = self.loop.create_future()
        # If caching, cache this Future.
        if self.cache:
            self._cache[cache_key] = future

        self.do_resolve_reject(key, future)
        return future

    def do_resolve_reject(self, key, future):
        # Enqueue this Future to be dispatched.