useRetrieve()

function useRetrieve(
  fetchShape: ReadShape,
  params: object | null,
): Promise<any> | undefined;

function useRetrieve<
  Params extends Readonly<object>,
  S extends Schema
>(
  fetchShape: ReadShape<S, Params>,
  params: Params | null,
): Promise<any> | undefined;

Great for retrieving resources optimistically before they are needed.

This can be useful for ensuring resources early in a render tree before they are needed.

• Triggers fetch:
  • On first-render
    • or parameters change
    • or required entity is deleted
    • or imperative invalidation triggered
  • and When not in cache or result is considered stale
  • and When no identical requests are in flight
  • and when params are not null
• On Error (404, 500, etc):
  • Returned promise will reject
• On fetch returns a promise else undefined.

Example

Simple

function MasterPost({ id }: { id: number }) {
  useRetrieve(PostResource.detailShape(), { id });
  // ...
}

Conditional

function MasterPost({ id, doNotFetch }: { id: number, doNotFetch: boolean }) {
  useRetrieve(PostResource.detailShape(), doNotFetch ? null : { id });
  // ...
}

Useful FetchShapes to send

Resource provides these built-in:

• detailShape()
• listShape()

Feel free to add your own FetchShape as well.