routes to add and remove educational_stages separately

app/controllers/concerns/stageable_controller.rb

+module StageableController
+  extend ActiveSupport::Concern
+
+  included do
+    before_action :authenticate_user!, only: [:add_stages, :remove_stages]
+  end
+
+    # POST /v1/learning_objects/1/educational_stages
+    # POST /v1/learning_objects/1/educational_stages.json
+    def add_stages
+      stageable.add_educational_stages(ids: params[:educational_stages])
+      render json: stageable.educational_stages, status: :created
+    end
+
+    # DELETE /v1/learning_objects/1/educational_stages
+    # DELETE /v1/learning_objects/1/educational_stages.json
+    def remove_stages
+      stageable.remove_educational_stages(ids: params[:educational_stages])
+      render json: stageable.educational_stages, status: :ok
+    end
+
+    protected
+
+    def stageable
+      raise NotImplementedError
+    end
+
+end

app/controllers/v1/learning_objects_controller.rb

@@ -7,11 +7,12 @@ class V1::LearningObjectsController < ApplicationController
   include ::DeletedObjectsController
   include ::HighlightsController
   include ::SubjectableController
+  include ::StageableController
 
   before_action :authenticate_user!, except: [:create, :index, :show]
   before_action :set_learning_object, only: [:show, :update, :destroy]
   before_action :set_new_learning_object, only: :index
-  before_action :authorize!, except: [:create, :tagging, :untagging, :subjecting, :unsubjecting]
+  before_action :authorize!, except: [:create, :tagging, :untagging, :subjecting, :unsubjecting, :add_stages, :remove_stages]
 
   def index
     learning_objects = paginate LearningObject.includes(:tags, :publisher, :language, :license, :subjects, :educational_stages, :reviews)
@@ -71,6 +72,7 @@ class V1::LearningObjectsController < ApplicationController
   def sociable; set_learning_object; end
   def taggable; set_learning_object; end
   def subjectable; set_learning_object; end
+  def stageable; set_learning_object; end
 
   # Use callbacks to share common setup or constraints between actions.
   def set_learning_object

config/routes.rb

@@ -29,6 +29,13 @@ Rails.application.routes.draw do
     end
   end
 
+  concern :stageable do
+    member do
+      post 'educational_stages', as: :add_stages, action: :add_stages
+      delete 'educational_stages', as: :remove_stages, action: :remove_stages
+    end
+  end
+
   concern :sociable do
     member do
       post 'like', as: :like, action: :like
@@ -102,14 +109,14 @@ Rails.application.routes.draw do
       end
     end
 
-    resources :collections, concerns: [:followable, :sociable, :reviewable, :taggable, :versionable, :deletable, :highlights, :subjectable] do
+    resources :collections, concerns: [:followable, :sociable, :reviewable, :taggable, :versionable, :deletable, :highlights, :subjectable, :stageable] do
       member do
         post :items, to: 'collections#add_object'
         delete :items, to: 'collections#delete_object'
       end
     end
 
-    resources :learning_objects, concerns: [:sociable, :reviewable, :taggable, :versionable, :deletable, :highlights, :subjectable] do
+    resources :learning_objects, concerns: [:sociable, :reviewable, :taggable, :versionable, :deletable, :highlights, :subjectable, :stageable] do
       member do
         resource :chunk, module: 'learning_objects', only: [:create, :show]
         resource :upload, module: 'learning_objects', only: :create