require 'active_support/core_ext/string/inflections' module ActiveModel class Errors < Hash include DeprecatedErrorMethods def initialize(base) @base = base super() end alias_method :get, :[] alias_method :set, :[]= def [](attribute) if errors = get(attribute.to_sym) errors else set(attribute.to_sym, []) end end def []=(attribute, error) self[attribute.to_sym] << error end def each each_key do |attribute| self[attribute].each { |error| yield attribute, error } end end def size values.flatten.size end def to_a full_messages end def count to_a.size end def to_xml(options={}) require 'builder' unless defined? ::Builder options[:root] ||= "errors" options[:indent] ||= 2 options[:builder] ||= ::Builder::XmlMarkup.new(:indent => options[:indent]) options[:builder].instruct! unless options.delete(:skip_instruct) options[:builder].errors do |e| to_a.each { |error| e.error(error) } end end # Adds an error message (+messsage+) to the +attribute+, which will be returned on a call to on(attribute) # for the same attribute and ensure that this error object returns false when asked if empty?. More than one # error can be added to the same +attribute+ in which case an array will be returned on a call to on(attribute). # If no +messsage+ is supplied, :invalid is assumed. # If +message+ is a Symbol, it will be translated, using the appropriate scope (see translate_error). def add(attribute, message = nil, options = {}) message ||= :invalid message = generate_message(attribute, message, options) if message.is_a?(Symbol) self[attribute] << message end # Will add an error message to each of the attributes in +attributes+ that is empty. def add_on_empty(attributes, custom_message = nil) [attributes].flatten.each do |attribute| value = @base.send(:read_attribute_for_validation, attribute) is_empty = value.respond_to?(:empty?) ? value.empty? : false add(attribute, :empty, :default => custom_message) unless !value.nil? && !is_empty end end # Will add an error message to each of the attributes in +attributes+ that is blank (using Object#blank?). def add_on_blank(attributes, custom_message = nil) [attributes].flatten.each do |attribute| value = @base.send(:read_attribute_for_validation, attribute) add(attribute, :blank, :default => custom_message) if value.blank? end end # Returns all the full error messages in an array. # # class Company # validates_presence_of :name, :address, :email # validates_length_of :name, :in => 5..30 # end # # company = Company.create(:address => '123 First St.') # company.errors.full_messages # => # ["Name is too short (minimum is 5 characters)", "Name can't be blank", "Address can't be blank"] def full_messages(options = {}) full_messages = [] each do |attribute, messages| messages = Array.wrap(messages) next if messages.empty? if attribute == :base messages.each {|m| full_messages << m } else attr_name = attribute.to_s.humanize prefix = attr_name + I18n.t('activemodel.errors.format.separator', :default => ' ') messages.each do |m| full_messages << "#{prefix}#{m}" end end end full_messages end # Translates an error message in it's default scope (activemodel.errrors.messages). # Error messages are first looked up in models.MODEL.attributes.ATTRIBUTE.MESSAGE, if it's not there, # it's looked up in models.MODEL.MESSAGE and if that is not there it returns the translation of the # default message (e.g. activemodel.errors.messages.MESSAGE). The translated model name, # translated attribute name and the value are available for interpolation. # # When using inheritence in your models, it will check all the inherited models too, but only if the model itself # hasn't been found. Say you have class Admin < User; end and you wanted the translation for the :blank # error +message+ for the title +attribute+, it looks for these translations: # #
    #
  1. activemodel.errors.models.admin.attributes.title.blank
  2. #
  3. activemodel.errors.models.admin.blank
  4. #
  5. activemodel.errors.models.user.attributes.title.blank
  6. #
  7. activemodel.errors.models.user.blank
  8. #
  9. activemodel.errors.messages.blank
  10. #
  11. any default you provided through the +options+ hash (in the activemodel.errors scope)
  12. #
def generate_message(attribute, message = :invalid, options = {}) message, options[:default] = options[:default], message if options[:default].is_a?(Symbol) klass_ancestors = [@base.class] klass_ancestors += @base.class.ancestors.reject {|x| x.is_a?(Module)} defaults = klass_ancestors.map do |klass| [ :"models.#{klass.name.underscore}.attributes.#{attribute}.#{message}", :"models.#{klass.name.underscore}.#{message}" ] end defaults << options.delete(:default) defaults = defaults.compact.flatten << :"messages.#{message}" key = defaults.shift value = @base.send(:read_attribute_for_validation, attribute) options = { :default => defaults, :model => @base.class.name.humanize, :attribute => attribute.to_s.humanize, :value => value, :scope => [:activemodel, :errors] }.merge(options) I18n.translate(key, options) end end end