Module: ActiveRecord::Validations::ClassMethods

Defined in:
lib/active_record/validates_associated_record.rb

Instance Method Summary collapse

Instance Method Details

#validates_associated(*attr_names) ⇒ Object

This overwritten method will merge errors from associated record when it’s invalid

Examples

class Person < ActiveRecord::Base
  has_one :address
  validates_presence_of :name
  validates_associated_record :address
  delegate :street, :street=, :city, :city=, :state, :state=,
   :zip, :zip=, :to => :address
end

class Address < ActiveRecord::Base
  validates_presence_of :street, :city, :state, :zip
end

joe = Person.new
joe.valid? # => false

joe.errors.on(:name) # => "can't be blank"
joe.errors.on(:street) # => "can't be blank"
joe.errors.on(:city) # => "can't be blank"
joe.errors.on(:state) # => "can't be blank"
joe.errors.on(:zip) # => "can't be blank"



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# File 'lib/active_record/validates_associated_record.rb', line 29

def validates_associated(*attr_names)
  configuration = { :on => :save }
  configuration.update(attr_names.extract_options!)
  send(validation_method(configuration[:on]), configuration) do |record|
    attr_names.each do |attr_name|
      if associated_record = record.send(attr_name.to_sym)
        unless associated_record.valid?
          record.errors.merge(associated_record.errors)
        end
      end
    end
  end
end