Server side of ajaxy comments done, need to modify comments/_comments and make it work.

app/controllers/comments_controller.rb

@@ -6,7 +6,8 @@ class CommentsController < ApplicationController
   include ApplicationHelper
   before_filter :authenticate_user!
 
-  respond_to :html, :mobile
+  respond_to :html, :mobile, :only => [:create, :destroy]
+  respond_to :js, :only => [:index]
 
   rescue_from ActiveRecord::RecordNotFound do
     render :nothing => true, :status => 404
@@ -53,4 +54,13 @@ class CommentsController < ApplicationController
     end
   end
 
+  def index
+    @post = current_user.find_visible_post_by_id(params[:post_id])
+    if @post
+      @comments = @post.comments
+    else
+      raise ActiveRecord::RecordNotFound.new
+    end
+  end
+
 end

app/views/comments/_comments.haml

@@ -3,9 +3,9 @@
 -#   the COPYRIGHT file.
 
 - unless comments_expanded
-  %ul.show_comments{:class => ("hidden" if comments.size <= 3)}
+  %ul.show_comments{:class => ("hidden" if post.comments.count <= 3)}
     %li
-      %b= comment_toggle(comments.size)
+      %b= comment_toggle( post.comments.count )
 
 %ul.comments{:id => post.id, :class => ("hidden" if comments.size == 0 && !comments_expanded)}
   -if comments.size > 3

app/views/comments/index.js.erb

+var html = <%= render :partial => 'comments/comment', :collection => @comments, :locals => {:post => @post}  %>
+$('.comments', '.stream_element[data-guid="<%= @post.id %>"]').html(html);

config/routes.rb

@@ -16,7 +16,7 @@ Diaspora::Application.routes.draw do
 
   resources :posts, :only => [:show, :destroy] do
     resources :likes, :only => [:create, :destroy, :index]
-    resources :comments, :only => [:create, :destroy]
+    resources :comments, :only => [:create, :destroy, :index]
   end
 
   get 'bookmarklet' => 'status_messages#bookmarklet'

spec/controllers/comments_controller_spec.rb

@@ -117,4 +117,25 @@ describe CommentsController do
       response.body.strip.should be_empty
     end
   end
+
+  describe '#index' do
+    before do
+      @message = bob.post(:status_message, :text => "hey", :to => bob.aspects.first.id)
+      @comments = [alice, bob, eve].map{ |u| u.comment("hey", :post => @message) }
+    end
+    it 'returns all the comments for a post' do
+      get :index, :post_id => @message.id, :format => 'js'
+      assigns[:comments].should == @comments
+    end
+    it 'returns a 404 on a nonexistent post' do
+      get :index, :post_id => 235236, :format => 'js'
+      response.status.should == 404
+    end
+    it 'returns a 404 on a post that is not visible to the signed in user' do
+      message = eve.post(:status_message, :text => "hey", :to => eve.aspects.first.id)
+      bob.comment("hey", :post => @message)
+      get :index, :post_id => message.id, :format => 'js'
+      response.status.should == 404
+    end
+  end
 end