First complete with manager and submanager

app/models/module_app.rb

@@ -19,11 +19,17 @@ class ModuleApp
   
   has_one :app_auth,dependent: :delete
   
-
+  def managing_users
+    self.managers.collect{ |t| t.user }
+  end
+  
+  def sub_managing_users
+    self.sub_managers.collect{ |t| t.user }
+  end
   
   def assign_manager(user,assigner)
     manager = AppManager.first(conditions: {managing_app_id: self.id,user_id: user.id}) rescue nil    
-    if manager.nil?
+    if manager.nil? 
       manager = self.managers.create(:user => user,:rule_creator => assigner)
     end
     manager
@@ -31,7 +37,7 @@ class ModuleApp
   
   def assign_sub_manager(user,assigner)
     submanager = AppManager.first(conditions: {sub_managing_app_id: self.id,user_id: user.id}) rescue nil
-    if submanager.nil?
+    if submanager.nil? && !self.managing_users.include?(user)
       submanager = self.sub_managers.create(:user => user,:rule_creator => assigner)
     end
     submanager