initialize feed & use to_hash everywhere

app.rb

@@ -194,7 +194,7 @@ end
 
 get '/api/v1/users/:user_id/feeds' do |user_id|
   user = User.find_or_create_by(external_id: user_id)
-  user.feeds.to_json
+  user.feeds.map(&:to_hash).to_json
 end
 
 # POST /api/v1/users/:user_id/follow
@@ -265,6 +265,7 @@ if env.to_s == "development"
     CommentThread.delete_all
     Commentable.delete_all
     User.delete_all
+    Feed.delete_all
     {}.to_json
   end
 end

models/commentable.rb

@@ -15,8 +15,8 @@ class Commentable
 
   index [[:commentable_type, Mongo::ASCENDING], [:commentable_id, Mongo::ASCENDING]]
 
-  def to_hash
-    as_document
+  def to_hash(params={})
+    as_document.slice(*%w[_id commentable_type commentable_id])
   end
 
 end

models/feed.rb

@@ -15,4 +15,8 @@ class Feed
   validates_presence_of :target
 
   has_and_belongs_to_many :subscribers, class_name: "User", inverse_of: :subscribed_feeds
+
+  def to_hash(params={})
+    as_document.slice(*%w[_id feed_type info actor target])
+  end
 end

models/user.rb

@@ -18,6 +18,10 @@ class User
 
   index :external_id, unique: true
 
+  def to_hash(params={})
+    as_document.slice(*%w[_id external_id])
+  end
+
   def follow(user)
     if id != user.id and not following.include? user
       following << user

spec/app_spec.rb

@@ -7,6 +7,7 @@ describe "app" do
     CommentThread.delete_all
     Commentable.delete_all
     User.delete_all
+    Feed.delete_all
     
     commentable = Commentable.create!(commentable_type: "questions", commentable_id: "1")