Skip to content

useLazyLoadQuery vs usePreloadedQuery #15

Description

@tar-aldev

First of all, thank you for your example, it helped me to get at least something from relay (as docs are sometimes controversial and not clear).

I found that in the migration guide they say that useLazyLoadQuery can be used.
However, in the useLazyLoadQuery description, they say
Instead, prefer usePreloadedQuery.
https://relay.dev/docs/api-reference/use-lazy-load-query/#uselazyloadquery

The problem with usePreloadedQuery to me is that it gets queryRef out of nowhere in all examples. They say I should handle it in routing, but I don't think react-router allows to do this.

Although it could be done like this

const WrappedHomePage = () => {
  const [queryRef, loadQuery] = useQueryLoader(HomePageQuery);

  useMemo(() => {
    loadQuery();
  }, [loadQuery]);

  return <HomePage queryRef={queryRef} />;
};

const HomePage = ({ queryRef }) => {
  const query = usePreloadedQuery(
    graphql`
      # By convention it should be <ComponentName></ComponentName>
      query HomePageQuery {
        ...HomePageContainer_repository
      }
    `,
    queryRef
  );

  return (
    <div>
      <HomePageContainer fragmentRef={query} />
    </div>
  );
};

I am not sure whether it is better at all. Could anyone suggest a solution of integrating it with react-router and use preloaded query?

Activity

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions