Alternate method for deprecated "validates_associated" method in ruby in rails

As you can see at http://apidock.com/rails/ActiveModel/Validations/ClassMethods/validates_associated

This method has been deprecated.

I want to know the 开发者_StackOverflow中文版correct method that can be used in its place to validate associated models.

Thanks Neelesh

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You could create your own method and callback.

class ShoppingCart < ActiveRecord::Base
  has_many :items
  before_validation :check_items

  def check_items
    items.each do |item|
      # check if valid and add to errors if any
    end
    return false if errors.any? # this will cause save to return false
  end
end

See http://api.rubyonrails.org/classes/ActiveRecord/Callbacks.html

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validates_associated is not deprecated. Do not trust apidock.com - it shows deprecation warnings for many things due to internal changes in Rails 2 and 3. See http://api.rubyonrails.org/classes/ActiveRecord/Validations/ClassMethods.html#method-i-validates_associated