diff options
Diffstat (limited to 'activemodel/lib/active_model/validations/callbacks.rb')
-rw-r--r-- | activemodel/lib/active_model/validations/callbacks.rb | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/validations/callbacks.rb b/activemodel/lib/active_model/validations/callbacks.rb new file mode 100644 index 0000000000..afd65d3dd5 --- /dev/null +++ b/activemodel/lib/active_model/validations/callbacks.rb @@ -0,0 +1,57 @@ +require 'active_support/callbacks' + +module ActiveModel + module Validations + 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, extend ActiveModel::Callbacks from the class you are creating: + # + # class MyModel + # include ActiveModel::Validations::Callbacks + # + # before_validation :do_stuff_before_validation + # after_validation :do_tuff_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 + include ActiveSupport::Callbacks + define_callbacks :validation, :terminator => "result == false", :scope => [:kind, :name] + end + + module ClassMethods + def before_validation(*args, &block) + options = args.last + if options.is_a?(Hash) && options[:on] + options[:if] = Array.wrap(options[:if]) + options[:if] << "self.validation_context == :#{options[:on]}" + end + set_callback(:validation, :before, *args, &block) + end + + def after_validation(*args, &block) + options = args.extract_options! + options[:prepend] = true + options[:if] = Array.wrap(options[:if]) + options[:if] << "!halted && value != false" + options[:if] << "self.validation_context == :#{options[:on]}" if options[:on] + set_callback(:validation, :after, *(args << options), &block) + end + end + + protected + + # Overwrite run validations to include callbacks. + def run_validations! + _run_validation_callbacks { super } + end + end + end +end |