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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 <tt>on(attribute)</tt>
# for the same attribute and ensure that this error object returns false when asked if <tt>empty?</tt>. More than one
# error can be added to the same +attribute+ in which case an array will be returned on a call to <tt>on(attribute)</tt>.
# 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 (<tt>activemodel.errrors.messages</tt>).
# Error messages are first looked up in <tt>models.MODEL.attributes.ATTRIBUTE.MESSAGE</tt>, if it's not there,
# it's looked up in <tt>models.MODEL.MESSAGE</tt> and if that is not there it returns the translation of the
# default message (e.g. <tt>activemodel.errors.messages.MESSAGE</tt>). 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 <tt>class Admin < User; end</tt> and you wanted the translation for the <tt>:blank</tt>
# error +message+ for the <tt>title</tt> +attribute+, it looks for these translations:
#
# <ol>
# <li><tt>activemodel.errors.models.admin.attributes.title.blank</tt></li>
# <li><tt>activemodel.errors.models.admin.blank</tt></li>
# <li><tt>activemodel.errors.models.user.attributes.title.blank</tt></li>
# <li><tt>activemodel.errors.models.user.blank</tt></li>
# <li><tt>activemodel.errors.messages.blank</tt></li>
# <li>any default you provided through the +options+ hash (in the activemodel.errors scope)</li>
# </ol>
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
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