diff options
| -rw-r--r-- | activemodel/lib/active_model/validations/callbacks.rb | 87 |
1 files changed, 69 insertions, 18 deletions
diff --git a/activemodel/lib/active_model/validations/callbacks.rb b/activemodel/lib/active_model/validations/callbacks.rb index dbafd0bd1a..03a44a0e29 100644 --- a/activemodel/lib/active_model/validations/callbacks.rb +++ b/activemodel/lib/active_model/validations/callbacks.rb @@ -2,24 +2,24 @@ require 'active_support/callbacks' module ActiveModel module Validations + # == Active Model Validation callbacks + # + # Provides an interface for any class to have +before_validation+ and + # +after_validation+ callbacks. + # + # First, include ActiveModel::Validations::Callbacks from the class you are + # creating: + # + # class MyModel + # include ActiveModel::Validations::Callbacks + # + # before_validation :do_stuff_before_validation + # after_validation :do_stuff_after_validation + # end + # + # Like other <tt>before_*</tt> callbacks if +before_validation+ returns + # +false+ then <tt>valid?</tt> will not be called. module Callbacks - # == Active Model Validation callbacks - # - # Provides an interface for any class to have <tt>before_validation</tt> and - # <tt>after_validation</tt> callbacks. - # - # First, include ActiveModel::Validations::Callbacks from the class you are - # creating: - # - # class MyModel - # include ActiveModel::Validations::Callbacks - # - # before_validation :do_stuff_before_validation - # after_validation :do_stuff_after_validation - # end - # - # Like other before_* callbacks if <tt>before_validation</tt> returns false - # then <tt>valid?</tt> will not be called. extend ActiveSupport::Concern included do @@ -28,6 +28,30 @@ module ActiveModel end module ClassMethods + # Defines a callback that will get called right before validation + # happens. + # + # class Person + # include ActiveModel::Validations + # include ActiveModel::Validations::Callbacks + # + # attr_accessor :name + # + # validates_length_of :name, maximum: 6 + # + # before_validation :remove_whitespaces + # + # private + # + # def remove_whitespaces + # name.strip! + # end + # end + # + # person = Person.new + # person.name = ' bob ' + # person.valid? # => true + # person.name # => "bob" def before_validation(*args, &block) options = args.last if options.is_a?(Hash) && options[:on] @@ -37,6 +61,33 @@ module ActiveModel set_callback(:validation, :before, *args, &block) end + # Defines a callback that will get called right after validation + # happens. + # + # class Person + # include ActiveModel::Validations + # include ActiveModel::Validations::Callbacks + # + # attr_accessor :name, :status + # + # validates_presence_of :name + # + # after_validation :set_status + # + # private + # + # def set_status + # self.status = (errors.empty?) ? true : false + # end + # end + # + # person = Person.new + # person.name = '' + # person.valid? # => false + # person.status # => false + # person.name = 'bob' + # person.valid? # => true + # person.status # => true def after_validation(*args, &block) options = args.extract_options! options[:prepend] = true @@ -49,7 +100,7 @@ module ActiveModel protected # Overwrite run validations to include callbacks. - def run_validations! + def run_validations! #:nodoc: run_callbacks(:validation) { super } end end |