instance method `validates_each`

Ruby on Rails 3.0.20

Since v2.2.3

Available in: v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

validates_each(*attr_names, &block)

Validates each attribute against a block.

class Person
  include ActiveModel::Validations

  attr_accessor :first_name, :last_name

  validates_each :first_name, :last_name do |record, attr, value|
    record.errors.add attr, 'starts with z.' if value.to_s[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

attr_names rest
block block

Source

# File activemodel/lib/active_model/validations.rb, line 86
      def validates_each(*attr_names, &block)
        options = attr_names.extract_options!.symbolize_keys
        validates_with BlockValidator, options.merge(:attributes => attr_names.flatten), &block
      end

Defined in activemodel/lib/active_model/validations.rb line 86 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveModel::Validations::ClassMethods

Signature

Parameters