Joining AngularFire paths on a value/key is not working (merging user profiles into records)

Question

I am developing an application with Firebase (1.0) and Angular (1.4). The problem I\'m having is to ensure the data in view are synchronised with Firebase, while fetching denorm

Answer 1

I realize this is an old question but I thought I share my solution for those who are still googling.

Like Brandon mentions you shouldn't have the auther as an object, just and ID (reference)

Your data should look like this:

{ 
    books: {
        JyDpkQrUozE3L7flpo: {
            title: "title1",
            authorId: JyDpkQrUozE3L7fl1x
        },
        JyDpkQrUozE3L7flp1: {
            title: "title2",
            authorId: JyDptrrrezE3L7flKx
        },
        JyDpkQrUozE3L7flp2: {
            title: "title3",
            authorId: JyDpkQrUozE3L7f222
        }

    },
    authors: {
        JyDpkQrUozE3L7flKx: {
            firstname: "jacques",
            lastname: "smith"
        },
        JyDptrrrezE3L7flKx: {
            firstname: "bill",
            lastname: "halley"
        },
        JyDpkQrUozE3L7f222: {
            firstname: "john",
            lastname: "ford"
        }
    }
}

Note that I changed the author to authorId to be more explicit what is a authoer object and what is just the id. Now lets get all the books and the author.

app.factory('BooksWithAuthor', function($firebaseArray, $firebaseObject) {
      const books = firebase.database().ref('books')
      const authors = firebase.database().ref('authors');

      const bookList = $firebaseArray.$extend({
        $$added: function(snap) {
          const book = $firebaseArray.prototype.$$added.call(this, snap);
          book.author = $firebaseObject(authors.child(book.authorId));
          return record;
        }
      });

    return new bookList(books)
});

app.controller('BookCtrl, function(BooksWithAuthor) {
  $scope.BookList = BooksWithAuthor;
});

And then in your HTML just do

{{ book.title }} was written by {{ book.author.firstname }} {{ book.author.lastname }}