Ignore stock level column of Product

rails_application/app/models/product.rb

@@ -2,25 +2,20 @@
 
 class Product < ApplicationRecord
   self.locking_column = :version
+  self.ignored_columns = %w[stock_level]
 
   validates :name, presence: true
   validates :price, numericality: { greater_than: 0 }
   validate :validate_vat_rate
   validates :sku, presence: true
 
-  has_one :product_catalog, class_name: "Inventory::ProductCatalog", foreign_key: :product_id
+  has_one :product_catalog,
+          class_name: "Inventory::ProductCatalog",
+          foreign_key: :product_id
 
   default_scope { where(latest: true) }
 
-  before_create :set_stock_level
-
-  def set_stock_level
-    self.stock_level = 0
-  end
-
   def validate_vat_rate
-    unless vat_rate.is_a?(Numeric)
-      errors.add(:vat_rate, "is not a number")
-    end
+    errors.add(:vat_rate, "is not a number") unless vat_rate.is_a?(Numeric)
   end
 end