2.0.0-RC2-yeutech.2 • Public • Published

JSON Server Data Provider For React-Admin

JSON Server Data Provider for react-admin, the frontend framework for building admin applications on top of REST/GraphQL services.

react-admin demo


npm install --save ra-data-json-server

REST Dialect

This Data Provider fits REST APIs powered by JSON Server, such as JSONPlaceholder.

REST verb API calls
GET_LIST GET http://my.api.url/posts?_sort=title&_order=ASC&_start=0&_end=24&title=bar
GET_ONE GET http://my.api.url/posts/123
CREATE POST http://my.api.url/posts/123
UPDATE PUT http://my.api.url/posts/123
DELETE DELETE http://my.api.url/posts/123
GET_MANY GET http://my.api.url/posts/123, GET http://my.api.url/posts/456, GET http://my.api.url/posts/789
GET_MANY_REFERENCE GET http://my.api.url/posts?author_id=345

Note: The JSON Server REST Data Provider expects the API to include a X-Total-Count header in the response to GET_LIST calls. The value must be the total number of resources in the collection. This allows react-admin to know how many pages of resources there are in total, and build the pagination controls.

X-Total-Count: 319

If your API is on another domain as the JS code, you'll need to whitelist this header with an Access-Control-Expose-Headers CORS header.

Access-Control-Expose-Headers: X-Total-Count


// in src/App.js
import React from 'react';
import { Admin, Resource } from '@yeutech/react-admin';
import jsonServerProvider from '@yeutech/ra-data-json-server';

import { PostList } from './posts';

const App = () => (
    <Admin dataProvider={jsonServerProvider('http://jsonplaceholder.typicode.com')}>
        <Resource name="posts" list={PostList} />

export default App;

Adding Custom Headers

The provider function accepts an HTTP client function as second argument. By default, they use react-admin's fetchUtils.fetchJson() as HTTP client. It's similar to HTML5 fetch(), except it handles JSON decoding and HTTP error codes automatically.

That means that if you need to add custom headers to your requests, you just need to wrap the fetchJson() call inside your own function:

import { fetchUtils, Admin, Resource } from '@yeutech/react-admin';
import jsonServerProvider from '@yeutech/ra-data-json-server';

const httpClient = (url, options = {}) => {
    if (!options.headers) {
        options.headers = new Headers({ Accept: 'application/json' });
    // add your own headers here
    options.headers.set('X-Custom-Header', 'foobar');
    return fetchUtils.fetchJson(url, options);
const dataProvider = jsonServerProvider('http://jsonplaceholder.typicode.com', httpClient);

    <Admin dataProvider={dataProvider} title="Example Admin">

Now all the requests to the REST API will contain the X-Custom-Header: foobar header.

Tip: The most common usage of custom headers is for authentication. fetchJson has built-on support for the Authorization token header:

const httpClient = (url, options = {}) => {
    options.user = {
        authenticated: true,
    return fetchUtils.fetchJson(url, options);

Now all the requests to the REST API will contain the Authorization: SRTRDFVESGNJYTUKTYTHRG header.


This data provider is licensed under the MIT License, and sponsored by marmelab.




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