expo-firebase-firestore

expo-firebase is still in RC and therefore subject to breaking changings. Be sure to run yarn upgrade and cd ios; pod install when upgrading.

expo-firebase-firestore provides a json based cloud data store that is synchronized in real-time.

Full documentation

Installation

Now, you need to install the package from npm registry.

npm install expo-firebase-firestore or yarn add expo-firebase-firestore

iOS

Cocoapods

If you're using Cocoapods, add the dependency to your Podfile:

pod 'EXFirebaseFirestore', path: '../node_modules/expo-firebase-firestore/ios'

and run pod install.

Android

1. Append the following lines to android/settings.gradle:

   include ':expo-firebase-firestore'
   project(':expo-firebase-firestore').projectDir = new File(rootProject.projectDir, '../node_modules/expo-firebase-firestore/android')
   

   and if not already included

   include ':expo-core'
   project(':expo-core').projectDir = new File(rootProject.projectDir, '../node_modules/expo-core/android')
   
   include ':expo-firebase-app'
   project(':expo-firebase-app').projectDir = new File(rootProject.projectDir, '../node_modules/expo-firebase-app/android')
   

2. Insert the following lines inside the dependencies block in android/app/build.gradle:

   api project(':expo-firebase-firestore')
   

   and if not already included

   api project(':expo-core')
   api project(':expo-firebase-app')
   

3. Include the module in your expo packages: ./android/app/src/main/java/host/exp/exponent/MainActivity.java

   /*
   * At the top of the file.
   * This is automatically imported with Android Studio, but if you are in any other editor you will need to manually import the module.
   */
   import expo.modules.firebase.app.FirebaseAppPackage; // This should be here for all Expo Firebase features.
   import expo.modules.firebase.firestore.FirebaseFirestorePackage;
   
   // Later in the file...
   
   @Override
   public List<Package> expoPackages() {
     // Here you can add your own packages.
     return Arrays.<Package>asList(
       new FirebaseAppPackage(), // This should be here for all Expo Firebase features.
       new FirebaseFirestorePackage() // Include this.
     );
   }
   

Usage

import React from 'react';
import { Text, FlatList } from 'react-native';
import firebase from 'expo-firebase-app';

// API can be accessed with: firebase.firestore();

export default class WheatView extends React.Component {
  ref = firebase.firestore().collection('posts');
  state = { posts: [], loading: false };

  componentDidMount() {
    this.unsubscribe = this.ref.onSnapshot(this.onCollectionUpdate);
  }

  onCollectionUpdate = querySnapshot => {
    const posts = [];
    querySnapshot.forEach(doc => {
      const { title, complete } = doc.data();
      posts.push({
        key: doc.id,
        doc, // DocumentSnapshot
        title,
        complete,
      });
    });

    this.setState({
      posts,
      loading: false,
    });
  };

  componentWillUnmount() {
    this.unsubscribe();
  }

  renderItem = ({ item }) => <Text onPress={() => this.toggle(item)}>{item.title}</Text>;

  toggle = ({ doc, complete }) => {
    doc.ref.update({ complete: !complete });
  };

  post = ({ title }) => {
    this.ref.add({
      title,
      complete: false,
    });
  };

  render() {
    return <FlatList data={this.state.posts} renderItem={this.renderItem} />;
  }
}