EAN to string + integer validation

app/models/p_product_ref.rb

@@ -18,7 +18,7 @@ class PProductRef < ApplicationRecord
   accepts_nested_attributes_for :p_product_ref_specs, allow_destroy: true
 
   #validates :ct_price_ht, :presence => true
-  
+  validate :ean, :is_integer
 
   has_many :p_customer_product_prices, :dependent => :destroy
   accepts_nested_attributes_for :p_customer_product_prices, allow_destroy: true
@@ -167,4 +167,10 @@ class PProductRef < ApplicationRecord
     end
   end
 
+  def is_integer
+    if ean.present? && ean.match(/\A[+-]?\d+\z/).nil?
+      errors.add(:ean, "ne doit être composé que de chiffres")
+    end
+  end
+
 end

db/migrate/20210917122153_add_ean_to_p_product_refs.rb

@@ -1,5 +1,5 @@
 class AddEanToPProductRefs < ActiveRecord::Migration[6.0]
   def change
-    add_column :p_product_refs, :ean, :integer
+    add_column :p_product_refs, :ean, :string
   end
 end

db/schema.rb

@@ -1799,7 +1799,7 @@ ActiveRecord::Schema.define(version: 2021_09_17_124338) do
     t.decimal "ca_dee", precision: 10
     t.decimal "cc_dee", precision: 10
     t.decimal "ct_dee", precision: 10
-    t.integer "ean"
+    t.string "ean"
     t.string "sorecop_comment"
   end