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module ActiveModel
module Validations
VALIDATIONS = %w( validate validate_on_create validate_on_update )
def self.included(base) # :nodoc:
base.extend(ClassMethods)
base.send!(:include, ActiveSupport::Callbacks)
VALIDATIONS.each do |validation_method|
base.class_eval <<-"end_eval"
def self.#{validation_method}(*methods, &block)
methods = CallbackChain.build(:#{validation_method}, *methods, &block)
self.#{validation_method}_callback_chain.replace(#{validation_method}_callback_chain | methods)
end
def self.#{validation_method}_callback_chain
if chain = read_inheritable_attribute(:#{validation_method})
return chain
else
write_inheritable_attribute(:#{validation_method}, CallbackChain.new)
return #{validation_method}_callback_chain
end
end
end_eval
end
end
# All of the following validations are defined in the class scope of the model that you're interested in validating.
# They offer a more declarative way of specifying when the model is valid and when it is not. It is recommended to use
# these over the low-level calls to validate and validate_on_create when possible.
module ClassMethods
DEFAULT_VALIDATION_OPTIONS = {
:on => :save,
:allow_nil => false,
:allow_blank => false,
:message => nil
}.freeze
private
def validation_method(on)
case on
when :save then :validate
when :create then :validate_on_create
when :update then :validate_on_update
end
end
end
# Returns the Errors object that holds all information about attribute error messages.
def errors
@errors ||= Errors.new
end
# Runs all the specified validations and returns true if no errors were added otherwise false.
def valid?
errors.clear
run_callbacks(:validate)
if responds_to?(:validate)
ActiveSupport::Deprecations.warn "Base#validate has been deprecated, please use Base.validate :method instead"
validate
end
if new_record?
run_callbacks(:validate_on_create)
if responds_to?(:validate_on_create)
ActiveSupport::Deprecations.warn(
"Base#validate_on_create has been deprecated, please use Base.validate :method, :on => :create instead")
validate_on_create
end
else
run_callbacks(:validate_on_update)
if responds_to?(:validate_on_update)
ActiveSupport::Deprecations.warn(
"Base#validate_on_update has been deprecated, please use Base.validate :method, :on => :update instead")
validate_on_update
end
end
errors.empty?
end
end
end
Dir[File.dirname(__FILE__) + "/validations/*.rb"].sort.each do |path|
filename = File.basename(path)
require "active_model/validations/#{filename}"
end
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