`useGetOne`

This hook calls dataProvider.getOne() when the component mounts. It queries the data provider for a single record, based on its id.

// syntax
const { data, isLoading, error, refetch } = useGetOne(
    resource,
    { id, meta },
    options
);

// example
import { useGetOne } from 'react-admin';

const UserProfile = ({ record }) => {
    const { data, isLoading, error } = useGetOne('users', { id: record.id });
    if (isLoading) { return <Loading />; }
    if (error) { return <p>ERROR</p>; }
    return <div>User {data.username}</div>;
};

Tip: If you use useGetOne several times on a page for the same resource, prefer useGetMany instead, as it de-duplicates and aggregates queries for a single record into one batch query for many records.

-useGetOne('posts', { id });
+useGetMany('posts', { id: [id] });