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gatsby-firestore npm node

Gatsby plugin for connecting Firebase Firestore as a data source. Supports subcollections.

Usage

  1. Generate and download a Firebase Admin SDK private key by accessing the Firebase Project Console > Settings > Service Accounts
  2. Rename and put the downloaded .json crendtial file somewhere in the GatsbyJS project (e.g. ./credentials.json)
  3. Add gatsby-source-firestore as a dependency by running using npm or yarn:

    npm i @martinreiche/gatsby-firestore
    # or
    yarn add @martinreiche/gatsby-firestore
  4. Configure settings at gatsby-config.js, for example:

    module.exports = {
     plugins: [
       {
         resolve: `@martinreiche/gatsby-firestore`,
         options: {
           // credential or appConfig
           credential: require(`./credentials.json`),
           appConfig: {
             apiKey: 'api-key',
             authDomain: 'project-id.firebaseapp.com',
             databaseURL: 'https://project-id.firebaseio.com',
             projectId: 'project-id',
             storageBucket: 'project-id.appspot.com',
             messagingSenderId: 'sender-id',
             appID: 'app-id',
           },
           types: [
             {
               type: `Book`,
               collection: `books`,
               map: doc => ({
                 title: doc.title,
                 isbn: doc.isbn,
                 author___NODE: doc.author.id,
               }),
             },
             {
               type: `Author`,
               collection: `authors`,
               map: doc => ({
                 name: doc.name,
                 country: doc.country,
                 books___NODE: doc.books.map(book => book.id),
               }),
             },
           ],
         },
       },
     ],
    };

    Note that you will need to have books and authors in Firestore matching this schema before Gatsby can query correctly, e.g books__NODE on author needs to be an array with books as a key of reference types to book documents.

    Test GraphQL query:

    {
     allBooks {
       edges {
         node {
           title
           isbn
           author {
             name
           }
         }
       }
     }
    }

Support for subcollections

To query subcollections, you have to specify the subCollection Array in the types configuration. They can be nested infinitely deep as long as they exist in Firestore. For example, if books were a subcollection of authors in Firestore, you could do the following:

module.exports = {
  plugins: [
    {
      resolve: `@martinreiche/gatsby-firestore`,
      options: {
        // credential or appConfig
        credential: require(`./credentials.json`),
        appConfig: {
          apiKey: 'api-key',
          authDomain: 'project-id.firebaseapp.com',
          databaseURL: 'https://project-id.firebaseio.com',
          projectId: 'project-id',
          storageBucket: 'project-id.appspot.com',
          messagingSenderId: 'sender-id',
          appID: 'app-id',
        },
        types: [
          {
            type: `Author`,
            collection: `authors`,
            map: doc => ({
              name: doc.name,
              country: doc.country,
            }),
            subCollections: [
              {
                type: `Book`,
                collection: `books`,
                map: doc => ({
                  title: doc.title,
                  isbn: doc.isbn,
                }),
              },
            ],
          },
        ],
      },
    },
  ],
};

books now become children of author and you can query them like this:

{
  allAuthor {
    edges {
      node {
        name
        childrenBook {
          title
          isbn
        }
      }
    }
  }
}

Configurations

Key Description
credential Credential configurations from downloaded private key
types Array of types, which require the following keys (type, collection, map)
types.type The type of the collection, which will be used in GraphQL queries, e.g. when type = Book, the GraphQL types are named book and allBook
types.collection The name of the collections in Firestore. Supports nested collections like authors/<authorId>/books where <authorId> is the ID of one specific author record
types.map A function to map your data in Firestore to Gatsby nodes
types.subCollections Optional: Array of types for the current type —see types

Acknowledgement


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