Makes user.moderator? return true for administrators

app/models/user.rb

@@ -25,6 +25,6 @@ class User < ActiveRecord::Base
   end
 
   def moderator?
-    @is_moderator ||= Moderator.where(user_id: id).exists?
+    @is_moderator ||= Moderator.where(user_id: id).exists? || administrator?
   end
 end

spec/models/user_spec.rb

@@ -86,7 +86,7 @@ describe User do
   end
 
   describe "moderator?" do
-    it "is false when the user is not a moderator" do
+    it "is false when the user is not a moderator nor an administrator" do
       expect(subject.moderator?).to be false
     end
 
@@ -95,6 +95,12 @@ describe User do
       create(:moderator, user: subject)
       expect(subject.moderator?).to be true
     end
+
+    it "is true when the user is an administrator" do
+      subject.save
+      create(:administrator, user: subject)
+      expect(subject.moderator?).to be true
+    end
   end
 
 end