mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
65 lines
2.4 KiB
Ruby
65 lines
2.4 KiB
Ruby
|
module ActiveModel
|
||
|
|
module Validations
|
||
|
|
module ClassMethods
|
||
|
|
|
||
|
|
# Passes the record off to the class or classes specified and allows them to add errors based on more complex conditions.
|
||
|
|
#
|
||
|
|
# class Person < ActiveRecord::Base
|
||
|
|
# validates_with MyValidator
|
||
|
|
# end
|
||
|
|
#
|
||
|
|
# class MyValidator < ActiveRecord::Validator
|
||
|
|
# def validate
|
||
|
|
# if some_complex_logic
|
||
|
|
# record.errors[:base] << "This record is invalid"
|
||
|
|
# end
|
||
|
|
# end
|
||
|
|
#
|
||
|
|
# private
|
||
|
|
# def some_complex_logic
|
||
|
|
# # ...
|
||
|
|
# end
|
||
|
|
# end
|
||
|
|
#
|
||
|
|
# You may also pass it multiple classes, like so:
|
||
|
|
#
|
||
|
|
# class Person < ActiveRecord::Base
|
||
|
|
# validates_with MyValidator, MyOtherValidator, :on => :create
|
||
|
|
# end
|
||
|
|
#
|
||
|
|
# Configuration options:
|
||
|
|
# * <tt>on</tt> - Specifies when this validation is active (<tt>:create</tt> or <tt>:update</tt>
|
||
|
|
# * <tt>if</tt> - Specifies a method, proc or string to call to determine if the validation should
|
||
|
|
# occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>).
|
||
|
|
# The method, proc or string should return or evaluate to a true or false value.
|
||
|
|
# * <tt>unless</tt> - Specifies a method, proc or string to call to determine if the validation should
|
||
|
|
# not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>).
|
||
|
|
# The method, proc or string should return or evaluate to a true or false value.
|
||
|
|
#
|
||
|
|
# If you pass any additional configuration options, they will be passed to the class and available as <tt>options</tt>:
|
||
|
|
#
|
||
|
|
# class Person < ActiveRecord::Base
|
||
|
|
# validates_with MyValidator, :my_custom_key => "my custom value"
|
||
|
|
# end
|
||
|
|
#
|
||
|
|
# class MyValidator < ActiveRecord::Validator
|
||
|
|
# def validate
|
||
|
|
# options[:my_custom_key] # => "my custom value"
|
||
|
|
# end
|
||
|
|
# end
|
||
|
|
#
|
||
|
|
def validates_with(*args)
|
||
|
|
configuration = args.extract_options!
|
||
|
|
|
||
|
|
send(validation_method(configuration[:on]), configuration) do |record|
|
||
|
|
args.each do |klass|
|
||
|
|
klass.new(record, configuration.except(:on, :if, :unless)).validate
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
|