118 lines
3.3 KiB
Ruby
118 lines
3.3 KiB
Ruby
module ActiveModel
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module Validations
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# == Active \Model \Validation \Callbacks
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#
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# Provides an interface for any class to have +before_validation+ and
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# +after_validation+ callbacks.
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#
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# First, include ActiveModel::Validations::Callbacks from the class you are
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# creating:
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#
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# class MyModel
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# include ActiveModel::Validations::Callbacks
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#
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# before_validation :do_stuff_before_validation
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# after_validation :do_stuff_after_validation
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# end
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#
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# Like other <tt>before_*</tt> callbacks if +before_validation+ throws
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# +:abort+ then <tt>valid?</tt> will not be called.
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module Callbacks
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extend ActiveSupport::Concern
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included do
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include ActiveSupport::Callbacks
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define_callbacks :validation,
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skip_after_callbacks_if_terminated: true,
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scope: [:kind, :name]
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end
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module ClassMethods
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# Defines a callback that will get called right before validation.
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#
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# class Person
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# include ActiveModel::Validations
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# include ActiveModel::Validations::Callbacks
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#
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# attr_accessor :name
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#
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# validates_length_of :name, maximum: 6
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#
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# before_validation :remove_whitespaces
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#
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# private
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#
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# def remove_whitespaces
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# name.strip!
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# end
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# end
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#
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# person = Person.new
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# person.name = ' bob '
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# person.valid? # => true
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# person.name # => "bob"
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def before_validation(*args, &block)
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options = args.extract_options!
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options[:if] = Array(options[:if])
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if options.key?(:on)
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options[:if].unshift ->(o) {
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!(Array(options[:on]) & Array(o.validation_context)).empty?
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}
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end
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args << options
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set_callback(:validation, :before, *args, &block)
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end
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# Defines a callback that will get called right after validation.
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#
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# class Person
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# include ActiveModel::Validations
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# include ActiveModel::Validations::Callbacks
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#
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# attr_accessor :name, :status
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#
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# validates_presence_of :name
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#
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# after_validation :set_status
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#
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# private
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#
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# def set_status
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# self.status = errors.empty?
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# end
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# end
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#
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# person = Person.new
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# person.name = ''
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# person.valid? # => false
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# person.status # => false
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# person.name = 'bob'
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# person.valid? # => true
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# person.status # => true
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def after_validation(*args, &block)
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options = args.extract_options!
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options[:prepend] = true
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options[:if] = Array(options[:if])
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if options.key?(:on)
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options[:if].unshift ->(o) {
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!(Array(options[:on]) & Array(o.validation_context)).empty?
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}
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end
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args << options
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set_callback(:validation, :after, *args, &block)
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end
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end
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private
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# Overwrite run validations to include callbacks.
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def run_validations!
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_run_validation_callbacks { super }
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end
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end
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end
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end
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