diff --git a/app/models/p_product_ref.rb b/app/models/p_product_ref.rb
index 9a7fccf..8e08f51 100644
--- a/app/models/p_product_ref.rb
+++ b/app/models/p_product_ref.rb
@@ -10,6 +10,8 @@ class PProductRef < ApplicationRecord
 
   belongs_to :p_product_color
 
+  has_many :line_stocks
+
   has_many :p_articles
   has_many :p_article_serial_nums, through: :p_articles
   accepts_nested_attributes_for :p_article_serial_nums, allow_destroy: true