MongoDB Atlas GraphQL User Privileges for your mobile app - Tutorial

MongoDB Atlas App Services & Realm Atlas GraphQL API
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To create user privilege access using MongoDB GraphQL API in a react.native app, you can follow these steps:

  1. Define the user roles and permissions in the MongoDB Atlas cluster.
  2. Define the GraphQL schema for the app with the required fields and types.
  3. Use the apollo-link-context package to set the authorization token in the headers for each GraphQL request.
  4. Use the react-apollo package to make the GraphQL queries and mutations from the react.native app.
  5. Implement the logic for each user role and permission in the resolvers of the GraphQL schema.
  6. Test the user privilege access by logging in with different user roles and performing the permitted actions.

Here is an example code snippet for setting the authorization token in the headers using apollo-link-context:

import { setContext } from 'apollo-link-context';
import { ApolloClient } from 'apollo-client';
import { HttpLink } from 'apollo-link-http';

// Set the authorization token in the headers
const authLink = setContext((_, { headers }) => {
  const token = localStorage.getItem('authToken');
  return {
    headers: {
      ...headers,
      authorization: token ? `Bearer ${token}` : "",
    },
  };
});

// Create the Apollo client with the HttpLink and authLink
const client = new ApolloClient({
  link: authLink.concat(new HttpLink({ uri: 'https://your-api-url/graphql' })),
  cache: new InMemoryCache(),
});

Note that this is just an example and you will need to customize it according to your app’s requirements.