Add def trigger_schedule in Trigger. Use persisted? for checling existance

app/controllers/projects/settings/ci_cd_controller.rb

@@ -27,7 +27,6 @@ module Projects
       def define_triggers_variables
         @triggers = @project.triggers
         @trigger = Ci::Trigger.new
-        @trigger.build_trigger_schedule
       end
 
       def define_badges_variables

app/controllers/projects/triggers_controller.rb

@@ -34,7 +34,6 @@ class Projects::TriggersController < Projects::ApplicationController
   end
 
   def edit
-    @trigger.build_trigger_schedule unless @trigger.trigger_schedule.present?
   end
 
   def update

app/models/ci/trigger.rb

@@ -39,5 +39,9 @@ module Ci
     def can_access_project?
       self.owner_id.blank? || Ability.allowed?(self.owner, :create_build, project)
     end
+
+    def trigger_schedule
+      super || build_trigger_schedule
+    end
   end
 end

app/views/projects/triggers/_trigger.html.haml

@@ -30,7 +30,7 @@
       Never
 
   %td
-    - if trigger.trigger_schedule.present?
+    - if trigger.trigger_schedule.persisted?
       = trigger.trigger_schedule.real_next_run
     - else
       N/A (External trigger)