On this page
module ActiveModel::Validations::Callbacks::ClassMethods
Public Instance Methods
# File activemodel/lib/active_model/validations/callbacks.rb, line 94
def after_validation(*args, &block)
options = args.extract_options!
options[:prepend] = true
options[:if] = Array(options[:if])
if options.key?(:on)
options[:if].unshift ->(o) {
!(Array(options[:on]) & Array(o.validation_context)).empty?
}
end
args << options
set_callback(:validation, :after, *args, &block)
end
Defines a callback that will get called right after validation.
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?
end
end
person = Person.new
person.name = ''
person.valid? # => false
person.status # => false
person.name = 'bob'
person.valid? # => true
person.status # => true
# File activemodel/lib/active_model/validations/callbacks.rb, line 54
def before_validation(*args, &block)
options = args.extract_options!
options[:if] = Array(options[:if])
if options.key?(:on)
options[:if].unshift ->(o) {
!(Array(options[:on]) & Array(o.validation_context)).empty?
}
end
args << options
set_callback(:validation, :before, *args, &block)
end
Defines a callback that will get called right before validation.
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"
© 2004–2018 David Heinemeier Hansson
Licensed under the MIT License.