Delete Fix for parent child process in Menu

app/models/menu.rb

@@ -22,4 +22,13 @@ class Menu < ApplicationRecord
 
     return current_menu
   end
+
+  def self.destroyMenu(menu)
+      cats = MenuCategory.where("menu_id=?",menu.id)
+      cats.each do |cat|
+        abc = MenuCategory.destroyCategory(cat)
+      end 
+      menu.destroy
+      return false
+  end
 end

app/models/menu_category.rb

@@ -8,5 +8,29 @@ class MenuCategory < ApplicationRecord
 
   default_scope { order('order_by asc') }
 
+  def self.destroyCategory(menu_category)
+  	# find the sub menu item of current item
+    sub_menu_cat = MenuCategory.where("menu_category_id=?",menu_category.id)
+    if sub_menu_cat.length != 0
+      sub_menu_cat.each do |sub|    
+        if destroyCategory(sub)
+        end
+      end
+      # find the items of current menu item
+      items = MenuItem.where("menu_category_id=?",menu_category.id)
+      items.each do |item|
+        abc = MenuItem.deleteRecursive(item)
+      end 
+      menu_category.destroy
+      return true
+    else
+      items = MenuItem.where("menu_category_id=?",menu_category.id)
+      items.each do |item|
+        abc = MenuItem.deleteRecursive(item)
+      end 
+      menu_category.destroy
+      return false
+    end
+  end
 
 end

app/models/menu_item.rb

@@ -1,5 +1,5 @@
 class MenuItem < ApplicationRecord
-  belongs_to :account
+  # belongs_to :account
   belongs_to :menu_category, :optional => true
   has_many :menu_item_instances
   belongs_to :parent, :class_name => "MenuItem", foreign_key: "menu_item_id", :optional => true
@@ -38,4 +38,31 @@ class MenuItem < ApplicationRecord
 
     return nil
   end
+
+  def self.deleteRecursive(menu_item)
+
+    # find the sub menu item of current item
+    sub_menu_items = MenuItem.where("menu_item_id=?",menu_item.id)
+    if sub_menu_items.length != 0
+      sub_menu_items.each do |subitem|    
+        if deleteRecursive(subitem)
+        end
+      end
+      # find the instances of current menu item
+      instances = MenuItemInstance.where("menu_item_id=?",menu_item.id)
+      instances.each do |instance|
+        instance.destroy
+      end 
+      menu_item.destroy
+      return true
+    else
+      instances = MenuItemInstance.where("menu_item_id=?",menu_item.id)
+      instances.each do |instance|
+        instance.destroy
+      end 
+      menu_item.destroy
+      return false
+    end
+
+  end 
 end

app/models/menu_item_instance.rb

@@ -1,4 +1,12 @@
 class MenuItemInstance < ApplicationRecord
   belongs_to :menu_item
   
+  def self.findParentCategory(item)
+  	if item.menu_category_id
+      return item.menu_category_id
+    else
+      parentitem = MenuItem.find(item.menu_item_id)
+      findParentCategory(parentitem)
+    end
+  end
 end