`useDataProvider`

React-admin stores the dataProvider object in a React context, so it’s available from anywhere in your application code. The useDataProvider hook exposes the Data Provider to let you call it directly.

For instance, here is how to query the Data Provider for the current user profile:

import { useState, useEffect } from 'react';
import { useDataProvider } from 'react-admin';
import { Loading, Error } from './MyComponents';

const UserProfile = ({ userId }) => {
    const dataProvider = useDataProvider();
    const [user, setUser] = useState();
    const [loading, setLoading] = useState(true);
    const [error, setError] = useState();
    useEffect(() => {
        dataProvider.getOne('users', { id: userId })
            .then(({ data }) => {
                setUser(data);
                setLoading(false);
            })
            .catch(error => {
                setError(error);
                setLoading(false);
            })
    }, []);

    if (loading) return <Loading />;
    if (error) return <Error />;
    if (!user) return null;

    return (
        <ul>
            <li>Name: {user.name}</li>
            <li>Email: {user.email}</li>
        </ul>
    )
};

But the recommended way to query the Data Provider is to use the dataProvider method hooks (like useGetOne for instance).

Tip: The dataProvider returned by the hook is actually a wrapper around your Data Provider. This wrapper logs the user out if the dataProvider returns an error, and if the authProvider sees that error as an authentication error (via authProvider.checkError()).

TypeScript

The useDataProvider hook accepts a generic parameter for the dataProvider type. This is useful when you added custom methods to your dataProvider:

// In src/dataProvider.ts
import { DataProvider } from 'react-admin';

export interface DataProviderWithCustomMethods extends DataProvider {
    archive: (resource: string, params: {
        id: number;
    }) => Promise<any>
}

export const dataProvider: DataProviderWithCustomMethods = {
    // ...Standard dataProvider methods
    archive: (resource, params) => {
        // Call the archive endpoint and return a promise
    }
}

// In src/ArchiveButton.tsx
import { Button, useDataProvider } from 'react-admin';
import ArchiveIcon from '@mui/icons-material/Archive';
import { DataProviderWithCustomMethods } from './src/dataProvider';

export const ArchiveButton = () => {
    const dataProvider = useDataProvider<DataProviderWithCustomMethods>();
    const record = useRecord();

    return (
        <Button
            label="Archive"
            onClick={() => {
                // TypeScript knows the archive method
                dataProvider.archive('resource', { id: record.id })
            }}
        >
            <ArchiveIcon />
        </Button>
    );
};

Besides, all the standard dataProvider methods accept a generic parameter for the record type:

dataProvider.getOne<Product>('users', { id: 123 })
    .then(({ data }) => {
        // TypeScript knows that data is of type Product
        // ...
    })