Rewrite ability

app/models/ability.rb

@@ -25,9 +25,7 @@ class Ability
   def initialize_user(user)
     can :read, :all
     can :manage, User, id: user.id
-    can :create, Order do |order|
-      order.try(:user) == user
-    end
+    can :create, Order, user: user
     can :destroy, Order do |order|
       order.try(:user) == user && order.deletable
     end

spec/models/ability_spec.rb

@@ -24,6 +24,7 @@ describe User do
       it{ should be_able_to(:destroy, Order.new(user: user, created_at: (Rails.application.config.call_api_after - 1.minutes).ago)) }
       it{ should_not be_able_to(:destroy, Order.new(user: user, created_at: 10.minutes.ago)) }
       it{ should_not be_able_to(:create, Order.new) }
+      it{ should_not be_able_to(:create, Order.new(user: create(:user))) }
       it{ should_not be_able_to(:update, Order.new) }
 
       it{ should be_able_to(:read, Product.new) }