refactoring backbone urls

public/javascripts/app/collections/comments.js

 app.collections.Comments = Backbone.Collection.extend({
-  model: app.models.Comment
+  model: app.models.Comment,
+
+  initialize : function(models, options) {
+    this.url = "/posts/" + options.post.id + "/comments" //not delegating to post.url() because when it is in a stream collection it delegates to that url
+  }
 });

public/javascripts/app/collections/likes.js

 app.collections.Likes = Backbone.Collection.extend({
-  model: app.models.Like
+  model: app.models.Like,
+
+  initialize : function(models, options) {
+    this.url = "/posts/" + options.post.id + "/likes" //not delegating to post.url() because when it is in a stream collection it delegates to that url
+  }
 });

public/javascripts/app/models/post.js

 app.models.Post = Backbone.Model.extend({
+  urlRoot : "/posts",
   initialize : function() {
-    this.comments = new app.collections.Comments(this.get("last_three_comments"));
-    this.comments.url = this.url() + '/comments';
-
-    this.likes = new app.collections.Likes(this.get("user_like")); // load in the user like initially
-    this.likes.url = this.url() + '/likes';
+    this.comments = new app.collections.Comments(this.get("last_three_comments"), {post : this});
+    this.likes = new app.collections.Likes(this.get("user_like"), { post : this}); // load in the user like initially
   },
 
-  url : function() {
-    if(this.id) {
-      return "/posts/" + this.id;
-    } else {
-      return "/posts"
-    }
+  createdAt : function() {
+    return new Date(this.get("created_at")) / 1000;
   },
 
-  reshareUrl : "/reshares",
+  createReshareUrl : "/reshares",
+
   reshare : function(){
     return this._reshare = this._reshare || new app.models.Reshare({root_guid : this.get("guid")});
   },
@@ -33,17 +28,8 @@ app.models.Post = Backbone.Model.extend({
     }
   },
 
-  createdAt : function() {
-    return new Date(this.get("created_at")) / 1000;
-  },
-
-
-  likeUrl : function(){
-    return this.url() + "/likes"
-  },
-
   like : function() {
-    this.set({ user_like : this.likes.create({}, {url : this.likeUrl()}) });
+    this.set({ user_like : this.likes.create() });
   },
 
   unlike : function() {

public/javascripts/app/views/feedback_view.js

@@ -18,7 +18,7 @@ app.views.Feedback = app.views.StreamObject.extend({
     if(!window.confirm("Reshare " + this.model.reshareAuthor().name + "'s post?")) { return }
     var reshare = this.model.reshare()
     reshare.save({}, {
-      url: this.model.reshareUrl,
+      url: this.model.createReshareUrl,
       success : function(){
         app.stream.collection.add(reshare);
       }

spec/javascripts/app/collections/comments_collection_spec.js

+describe("app.collections.comments", function(){
+  describe("url", function(){
+    it("should user the post id", function(){
+      var post =new app.models.Post({id : 5})
+      var collection = new app.collections.Comments([], {post : post})
+      expect(collection.url).toBe("/posts/5/comments")
+    })
+  })
+})
+

spec/javascripts/app/collections/likes_collections_spec.js

+describe("app.collections.Likes", function(){
+  describe("url", function(){
+    it("should user the post id", function(){
+      var post =new app.models.Post({id : 5})
+      var collection = new app.collections.Likes([], {post : post})
+      expect(collection.url).toBe("/posts/5/likes")
+    })
+  })
+})
+

spec/javascripts/app/models/post_spec.js

@@ -3,6 +3,15 @@ describe("app.models.Post", function() {
     this.post = new app.models.Post();
   })
 
+  describe("url", function(){
+    it("should be /posts when it doesn't have an id", function(){
+      expect(new app.models.Post().url()).toBe("/posts")
+    })
+  
+    it("should be /posts/id when it doesn't have an id", function(){
+      expect(new app.models.Post({id: 5}).url()).toBe("/posts/5")
+    })
+  })
   describe("createdAt", function() {
     it("returns the post's created_at as an integer", function() {
       var date = new Date;