module.exports = {
  plugins: [
    {
      resolve: 'gatsby-firesource',
      options: {
        credential: require("./firebase.json"),
        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),
            }),
          },
        ],
      },
    },
  ],
};