update menu import export

app/models/menu.rb

@@ -155,6 +155,7 @@ class Menu < ApplicationRecord
 
           # Menu Item Attributes
           item_attrs = []
+          if !row["Attributes"].nil?
             attributes = row["Attributes"].split(',')
             attributes.each do |attr|            
               attribute = MenuItemAttribute.find_by_name(attr)
@@ -163,9 +164,11 @@ class Menu < ApplicationRecord
               end
               item_attrs.push(attribute.id)
             end
+          end
 
           # Menu Item Options
           item_opts = []
+          if !row["Options"].nil?
           options = row["Options"].split(',')
             options.each do |opt|
               option = MenuItemOption.find_by_name(opt)
@@ -174,6 +177,7 @@ class Menu < ApplicationRecord
               end
               item_opts.push(option.id)
             end
+          end
 
           menu_itm = MenuItem.find_by_item_code(row["Item Code"]) 
           if !menu_itm
@@ -189,7 +193,11 @@ class Menu < ApplicationRecord
 
           menu_inst = MenuItemInstance.find_by_item_instance_code(row["Instance Code"]) 
           if !menu_inst
-            imported_instance = MenuItemInstance.create(menu_item_id: menu_itm.id, item_instance_code: row["Instance Code"], item_instance_name: row["Instance Name"], item_attributes: [], price: row["Price"], is_on_promotion: false, promotion_price: 0, is_available: true, is_default: row["Is Default"])
+            instance_name = ''
+            if !row["Instance Name"].nil? 
+              instance_name = row["Instance Name"]
+            end
+            imported_instance = MenuItemInstance.create(menu_item_id: menu_itm.id, item_instance_code: row["Instance Code"], item_instance_name: instance_name, item_attributes: [], price: row["Price"], is_on_promotion: false, promotion_price: 0, is_available: true, is_default: row["Is Default"])
           # else
           #   status = status + "Instance Code already exists for " + row["Instance Name"] + "."
           end