adding taggable concern

app/controllers/concerns/taggable_controller.rb

+module TaggableController
+  extend ActiveSupport::Concern
+
+  included do
+    before_action :authenticate_user!, only: [:tagging, :untagging]
+  end
+
+  # POST /v1/learning_objects/1/tagging
+  # POST /v1/learning_objects/1/tagging.json
+  def tagging
+    taggable.tag_list.add(params[:name])
+
+    if taggable.save
+      render json: @taggable, status: :ok
+    else
+      render json: @taggable.errors, status: :unprocessable_entity
+    end
+  end
+
+  # DELETE /v1/learning_objects/1/untagging
+  # DELETE /v1/learning_objects/1/untagging.json
+  def untagging
+    taggable.tag_list.remove(params[:name])
+
+    if taggable.save
+      render json: @taggable, status: :ok
+    else
+      render json: @taggable.errors, status: :unprocessable_entity
+    end
+  end
+
+  protected
+
+  def taggable
+    raise NotImplementedError
+  end
+
+  def tag_params
+    params.require(:tag).permit(:name)
+  end
+end

app/controllers/v1/collections_controller.rb

@@ -53,6 +53,10 @@ class V1::CollectionsController < ApplicationController
     set_collection
   end
 
+  def taggable
+    set_collection
+  end
+
   def sociable
     set_collection
   end
@@ -65,5 +69,4 @@ class V1::CollectionsController < ApplicationController
   def collection_params
     params.require(:collection).permit(:name, :description, :owner_id, :owner_type, learning_objects: [])
   end
-
 end

app/controllers/v1/learning_objects_controller.rb

@@ -53,6 +53,10 @@ class V1::LearningObjectsController < ApplicationController
     set_learning_object
   end
 
+  def taggable
+    set_learning_object
+  end
+
   # Use callbacks to share common setup or constraints between actions.
   def set_learning_object
     @learning_object ||= LearningObject.unscoped.find(params[:id])