Ruby on Rails

Hi All,

I am facing sort of problem while validating .

Two models User & Product.

class User < ActiveRecord::Base
   has_many :products, :dependent => :destroy
end

class Product < ActiveRecord::Base
   belongs_to :user
   validates :itemcode, :uniqueness => true
end

Now case,

System has number of users who can insert product information with
itemcode
uniqueness, but we need uniqueness validation with user_id and
itemcode.System need to check join table validation for new item with
user_id and itemcode.

Please suggest.

Thanks.

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