image_view.js

App.ImageView = Ember.View.extend({
  tagName: "img",
  attributeBindings: ["src"],

  failed: false,

  didInsertElement: function() {
    var self = this;

    this.$()[0].onerror = function() {
      if (!self.get("failed") && self.get("state") !== "destroyed") {
        self.set("failed", true);
        this.src = "https://s3.amazonaws.com/foobar/default_image.png";
      }
    };
  }

});