validates_each(*attrs) — ActiveRecord::Validations::ClassMethods

validates_each(*attrs)

Validates each attribute against a block.

class Person < ActiveRecord::Base
  validates_each :first_name, :last_name do |record, attr, value|
    record.errors.add attr, 'starts with z.' if value[0] == ?z
  end
end

Options:

:on - Specifies when this validation is active (default is :save, other options :create, :update).
:allow_nil - Skip validation if attribute is nil.
:allow_blank - Skip validation if attribute is blank.
:if - Specifies a method, proc or string to call to determine if the validation should occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The method, proc or string should return or evaluate to a true or false value.
:unless - Specifies a method, proc or string to call to determine if the validation should not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The method, proc or string should return or evaluate to a true or false value.

Parameters

attrs rest

Source

# File activerecord/lib/active_record/validations.rb, line 391
      def validates_each(*attrs)
        options = attrs.extract_options!.symbolize_keys
        attrs   = attrs.flatten

        # Declare the validation.
        send(validation_method(options[:on] || :save), options) do |record|
          attrs.each do |attr|
            value = record.send(attr)
            next if (value.nil? && options[:allow_nil]) || (value.blank? && options[:allow_blank])
            yield record, attr, value
          end
        end
      end

Defined in activerecord/lib/active_record/validations.rb line 391 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::Validations::ClassMethods

Signature

Parameters