diff options
Diffstat (limited to 'activemodel/lib')
| -rw-r--r-- | activemodel/lib/active_model/validations/with.rb | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/validations/with.rb b/activemodel/lib/active_model/validations/with.rb new file mode 100644 index 0000000000..851cdfebf0 --- /dev/null +++ b/activemodel/lib/active_model/validations/with.rb @@ -0,0 +1,64 @@ +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 + + |