add Complainable concern in User, Collection, Reaview and LearningObject models

app/models/collection.rb

@@ -31,6 +31,7 @@ class Collection < ApplicationRecord
   include Taggable
   include Trackable
   include Highlights
+  include Complainable
 
   has_many :collection_items, as: :collectionable, dependent: :destroy
   has_many :collections, through: :collection_items, source: :collectionable, source_type: 'Collection'
@@ -80,7 +81,7 @@ class Collection < ApplicationRecord
                                                             order: item[:order])}
     CollectionItem.import collection_items, on_duplicate_key_update: {conflict_target: [:collection_id, :collectionable_id, :collectionable_type], columns: [:order]}
   end
-  
+
   ## score methods
   def user_category
     owner.try('user_category')

app/models/review.rb

@@ -18,6 +18,7 @@
 class Review < ApplicationRecord
   # *current_user* review *reviewable*
   include Trackable
+  include Complainable
 
   belongs_to :reviewable, polymorphic: true
   belongs_to :user
@@ -25,7 +26,6 @@ class Review < ApplicationRecord
   has_many :review_ratings
   has_many :ratings, through: :review_ratings
   has_many :rates
-  has_many :complaints, as: :complaintable
 
   validates_presence_of :user, :reviewable
   validates_inclusion_of :reviewable_type, in: %w(LearningObject Collection), message: 'Only LearningObjects and Collections are reviewable.'

app/models/user.rb

@@ -37,6 +37,7 @@ class User < ApplicationRecord
   include Followable
   include Reputationable
   include Tagger
+  include Complainable
 
   # Include default devise modules. Others available are:
   # :confirmable, :lockable, :timeoutable and :omniauthable