add tag feature

app.rb

@@ -32,6 +32,7 @@ end
 
 post '/api/v1/:commentable_id/threads' do |commentable_id|
   thread = CommentThread.new(params.slice(*%w[title body course_id]).merge(commentable_id: commentable_id))
+  thread.tags = params["tags"] || ""
   thread.author = user
   thread.save!
   if params["auto_subscribe"] and author
@@ -46,6 +47,10 @@ end
 
 put '/api/v1/threads/:thread_id' do |thread_id|
   thread.update_attributes!(params.slice(*%w[title body]))
+  if params["tags"]
+    thread.tags = params["tags"]
+    thread.save!
+  end
   thread.to_hash.to_json
 end
 

models/comment_thread.rb

@@ -20,6 +20,9 @@ class CommentThread < Content
     string :course_id
     string :commentable_id
     string :author_id
+    string :tags, multiple: true do
+
+    end
   end
 
   belongs_to :author, class_name: "User", inverse_of: :comment_threads, index: true, autosave: true
@@ -53,10 +56,12 @@ class CommentThread < Content
   end
 
   def to_hash(params={})
-    doc = as_document.slice(*%w[title body course_id created_at updated_at]).
-                      merge("id" => _id).
-                      merge("user_id" => (author.id if author)).
-                      merge("votes" => votes.slice(*%w[count up_count down_count point]))
+    doc = as_document.slice(*%w[title body course_id created_at updated_at])
+                      .merge("id" => _id)
+                      .merge("user_id" => (author.id if author))
+                      .merge("votes" => votes.slice(*%w[count up_count down_count point]))
+                      .merge("tags" => tags_array)
+
     if params[:recursive]
       doc = doc.merge("children" => root_comments.map{|c| c.to_hash(recursive: true)})
     end

spec/comment_thread_spec.rb

@@ -32,6 +32,23 @@ describe "app" do
         get "/api/v1/threads/does_not_exist"
         last_response.status.should == 400
       end
+      it "get information of a single comment thread with its tags" do
+        thread = CommentThread.new
+        thread.title = "new thread"
+        thread.body = "hahaah"
+        thread.course_id = "1"
+        thread.commentable_id = "1"
+        thread.author = User.first
+        thread.tags = "taga, tagb, tagc"
+        thread.save!
+        get "/api/v1/threads/#{thread.id}"
+        last_response.should be_ok
+        response_thread = parse last_response.body
+        response_thread["tags"].length.should == 3
+        response_thread["tags"].should include "taga"
+        response_thread["tags"].should include "tagb"
+        response_thread["tags"].should include "tagc"
+      end
     end
     describe "PUT /api/v1/threads/:thread_id" do
       it "update information of comment thread" do
@@ -46,6 +63,22 @@ describe "app" do
         put "/api/v1/threads/does_not_exist", body: "new body", title: "new title"
         last_response.status.should == 400
       end
+      it "updates tag of comment thread" do
+        thread = CommentThread.first
+        put "/api/v1/threads/#{thread.id}", tags: "haha, hoho, huhu"
+        last_response.should be_ok
+        thread.reload
+        thread.tags_array.length.should == 3
+        thread.tags_array.should include "haha"
+        thread.tags_array.should include "hoho"
+        thread.tags_array.should include "huhu"
+        put "/api/v1/threads/#{thread.id}", tags: "aha, oho"
+        last_response.should be_ok
+        thread.reload
+        thread.tags_array.length.should == 2
+        thread.tags_array.should include "aha"
+        thread.tags_array.should include "oho"
+      end
     end
     describe "POST /api/v1/threads/:thread_id/comments" do
       it "create a comment to the comment thread" do

spec/commentable_spec.rb

@@ -68,6 +68,16 @@ describe "app" do
         Commentable.find("does_not_exist").comment_threads.length.should == 1
         Commentable.find("does_not_exist").comment_threads.first.body.should == "cool"
       end
+      it "create a new comment thread with tag" do
+        post '/api/v1/question_1/threads', title: "Interesting question", body: "cool", course_id: "1", user_id: "1", tags: "a, b, c"
+        last_response.should be_ok
+        CommentThread.count.should == 3
+        thread = CommentThread.where(title: "Interesting question").first
+        thread.tags_array.length.should == 3
+        thread.tags_array.should include "a"
+        thread.tags_array.should include "b"
+        thread.tags_array.should include "c"
+      end
     end
   end
 end