Add the ability to query multiple group ids

api/comment_threads.rb

@@ -3,6 +3,13 @@ get "#{APIPREFIX}/threads" do # retrieve threads by course
   threads = Content.where({"_type" => "CommentThread", "course_id" => params["course_id"]})
   if params[:commentable_ids]
     threads = threads.in({"commentable_id" => params[:commentable_ids].split(",")})
+  #if a group id is sent, then process the set of threads with that group id or with no group id
+  group_ids = get_group_ids_from_params(params)
+  if not group_ids.empty?
+    threads = threads.any_of(
+      {:group_id.in => group_ids},
+      {:group_id.exists => false},
+    )
   end
 
   handle_threads_query(

api/commentables.rb

@@ -7,6 +7,13 @@ get "#{APIPREFIX}/:commentable_id/threads" do |commentable_id|
   threads = Content.where({"_type" => "CommentThread", "commentable_id" => commentable_id})
   if params["course_id"]
     threads = threads.where({"course_id" => params["course_id"]})
+  threads = Content.where(_type:"CommentThread", commentable_id: commentable_id)
+  group_ids = get_group_ids_from_params(params)
+  if not group_ids.empty?
+    threads = threads.any_of(
+      {:group_id.in => group_ids},
+      {:group_id.exists => false},
+    )
   end
 
   handle_threads_query(

spec/api/comment_thread_spec.rb

@@ -67,6 +67,10 @@ describe "app" do
           @threads["t2"].save!
           rs = thread_result course_id: "omg", group_ids: "100,101", sort_order: "asc"
           rs.length.should == 2
+          rs.each_with_index { |res, i|
+            check_thread_result_json(nil, @threads["t#{i+1}"], res)
+            res["course_id"].should == "omg"
+          }
         end
         it "returns only threads where course id and group id match or group id is nil" do
           @threads["t1"].course_id = "omg"

spec/api/search_spec.rb

@@ -127,7 +127,8 @@ describe "app" do
 
         it "by group_ids" do
           get "/api/v1/search/threads", text: "text", group_ids: "1,2"
-          expected_ids = (0..29).find_all {|i| i % 5 == 0 || i % 5 == 1 || i % 5 == 2}
+          expected_ids = (0..29).find_all {|i| i % 5 == 0 || i % 5 == 1}
+          expected_ids.concat((0..29).find_all {|i| i % 5 == 2})
           assert_response_contains(expected_ids)
         end