Move and refactor method from follow to user model to get user interests. Add specification to check the discard of duplicate interests.

app/controllers/users_controller.rb

@@ -7,7 +7,7 @@ class UsersController < ApplicationController
 
   def show
     load_filtered_activity if valid_access?
-    load_interest if valid_interest_access?
+    load_interests if valid_interests_access?
   end
 
   private
@@ -63,15 +63,15 @@ class UsersController < ApplicationController
       @budget_investments = Budget::Investment.where(author_id: @user.id).order(created_at: :desc).page(params[:page])
     end
 
-    def load_interest
-      @interests = Follow.interests_by(@user)
+    def load_interests
+      @user.interests
     end
 
     def valid_access?
       @user.public_activity || authorized_current_user?
     end
 
-    def valid_interest_access?
+    def valid_interests_access?
       @user.public_interests || authorized_current_user?
     end
 

app/models/follow.rb

@@ -18,14 +18,4 @@ class Follow < ActiveRecord::Base
     !! by_user_and_followable(user, followable).try(:first)
   end
 
-  def self.interests_by(user)
-    interests = []
-    user.follows.each do |follow|
-      follow.followable.tags.each do |tag|
-        interests << tag.name
-      end
-    end
-    interests.uniq
-  end
-
 end

app/models/user.rb

@@ -309,6 +309,10 @@ class User < ActiveRecord::Base
     where(conditions.to_hash).where(["username = ?", login]).first
   end
 
+  def interests
+    follows.map{|follow| follow.followable.tags.map(&:name)}.flatten.compact.uniq
+  end
+
   private
 
     def clean_document_number

app/views/users/show.html.erb

@@ -49,7 +49,7 @@
       <% if @user.public_interests || @authorized_current_user %>
         <div id="public_interests" class="public-interests">
           <h4><%= t('account.show.public_interests_title_list') %></h4>
-          <% @interests.in_groups_of(10, false) do |interests_group| %>
+          <% @user.interests.in_groups_of(10, false) do |interests_group| %>
             <div class="small-4 column end">
               <ul class="no-bullet">
                 <% interests_group.each do |interest| %>