使用 AngularFire，是否可以创建关系式数据库?或者访问 UniqueIDs? [英] Using AngularFire, is it possible to to create relational-style databases? Or access the UniqueIDs?

问题描述

我看到 .

如果您使用的是隐式同步方法 (angularFire)，那么只要您指定将集合类型设置为Object"的第 4 个参数，您就已经可以访问这些键了':

function MyController($scope, angularFire) {var url = 'https://awesome.firebaseio-demo.com/comments';var promise = angularFire(url, $scope, 'comments', {});承诺.然后(功能(){var id = '-lw2NDTiZMFvzEWmSnYn';console.log($scope.comments[id]);});}

希望这会有所帮助！

I saw this post on Firebase's blog explaining the best way to create relational data objects using their platform. I'm struggling to translate these concepts to AngularFire, their integration with the AngularJS platform.

Specifically, I'm trying to display two linked data sets that have a one way pointer reference similar to how they described it in this example from their post:

var commentsRef = new Firebase("https://awesome.firebaseio-demo.com/comments");
var linkCommentsRef = new Firebase("https://awesome.firebaseio-demo.com/links/comments");

linkCommentsRef.on("child_added", function(snap) {
     commentsRef.child(snap.name()).once("value", function() {
         // Render the comment on the link page.
     ));
});

Question: Is it possible with the current AngularFile integration to make the pointer-style references to other data objects? And if so, can you provide an example?

Edit: I feel like I'd be able to solve these problems if I can just access the unique IDs generated by AngularFire for my data [see below]. How do I access them?

解决方案

Great question!

You do need access to the unique IDs, and we recently added a feature that will give you access to it via angularFireCollection: https://github.com/firebase/angularFire/pull/26.

If you're using the implicit sync method (angularFire), then you already have access to the keys as long as you specify the 4th argument that will set the type of the collection to 'Object':

function MyController($scope, angularFire) {
  var url = 'https://awesome.firebaseio-demo.com/comments';
  var promise = angularFire(url, $scope, 'comments', {});
  promise.then(function() {
    var id = '-lw2NDTiZMFvzEWmSnYn';
    console.log($scope.comments[id]);
  });
}

Hope this helps!

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