133c21b801
Update to Rails 2.3.1.
(Actually, not quite. Doesn't look like 2.3.1 will be released
today, but I REALLY want to push these bugfixes out.)
Removed bundled Rack (Rails 2.3.1 comes bundled with Rack 1.0).
Add
config.action_view.cache_template_loading = true
to production environment.
Fix FastCGI bug (http://rubyforge.org/tracker/index.php?func=detail&aid=24191&group_id=186&atid=783).
Fix WikiWords bug (http://rubyforge.org/pipermail/instiki-users/2009-February/001181.html).
275 lines
9.5 KiB
Ruby
275 lines
9.5 KiB
Ruby
module ActiveResource
|
|
class ResourceInvalid < ClientError #:nodoc:
|
|
end
|
|
|
|
# Active Resource validation is reported to and from this object, which is used by Base#save
|
|
# to determine whether the object in a valid state to be saved. See usage example in Validations.
|
|
class Errors
|
|
include Enumerable
|
|
attr_reader :errors
|
|
|
|
delegate :empty?, :to => :errors
|
|
|
|
def initialize(base) # :nodoc:
|
|
@base, @errors = base, {}
|
|
end
|
|
|
|
# Add an error to the base Active Resource object rather than an attribute.
|
|
#
|
|
# ==== Examples
|
|
# my_folder = Folder.find(1)
|
|
# my_folder.errors.add_to_base("You can't edit an existing folder")
|
|
# my_folder.errors.on_base
|
|
# # => "You can't edit an existing folder"
|
|
#
|
|
# my_folder.errors.add_to_base("This folder has been tagged as frozen")
|
|
# my_folder.valid?
|
|
# # => false
|
|
# my_folder.errors.on_base
|
|
# # => ["You can't edit an existing folder", "This folder has been tagged as frozen"]
|
|
#
|
|
def add_to_base(msg)
|
|
add(:base, msg)
|
|
end
|
|
|
|
# Adds an error to an Active Resource object's attribute (named for the +attribute+ parameter)
|
|
# with the error message in +msg+.
|
|
#
|
|
# ==== Examples
|
|
# my_resource = Node.find(1)
|
|
# my_resource.errors.add('name', 'can not be "base"') if my_resource.name == 'base'
|
|
# my_resource.errors.on('name')
|
|
# # => 'can not be "base"!'
|
|
#
|
|
# my_resource.errors.add('desc', 'can not be blank') if my_resource.desc == ''
|
|
# my_resource.valid?
|
|
# # => false
|
|
# my_resource.errors.on('desc')
|
|
# # => 'can not be blank!'
|
|
#
|
|
def add(attribute, msg)
|
|
@errors[attribute.to_s] = [] if @errors[attribute.to_s].nil?
|
|
@errors[attribute.to_s] << msg
|
|
end
|
|
|
|
# Returns true if the specified +attribute+ has errors associated with it.
|
|
#
|
|
# ==== Examples
|
|
# my_resource = Disk.find(1)
|
|
# my_resource.errors.add('location', 'must be Main') unless my_resource.location == 'Main'
|
|
# my_resource.errors.on('location')
|
|
# # => 'must be Main!'
|
|
#
|
|
# my_resource.errors.invalid?('location')
|
|
# # => true
|
|
# my_resource.errors.invalid?('name')
|
|
# # => false
|
|
def invalid?(attribute)
|
|
!@errors[attribute.to_s].nil?
|
|
end
|
|
|
|
# A method to return the errors associated with +attribute+, which returns nil, if no errors are
|
|
# associated with the specified +attribute+, the error message if one error is associated with the specified +attribute+,
|
|
# or an array of error messages if more than one error is associated with the specified +attribute+.
|
|
#
|
|
# ==== Examples
|
|
# my_person = Person.new(params[:person])
|
|
# my_person.errors.on('login')
|
|
# # => nil
|
|
#
|
|
# my_person.errors.add('login', 'can not be empty') if my_person.login == ''
|
|
# my_person.errors.on('login')
|
|
# # => 'can not be empty'
|
|
#
|
|
# my_person.errors.add('login', 'can not be longer than 10 characters') if my_person.login.length > 10
|
|
# my_person.errors.on('login')
|
|
# # => ['can not be empty', 'can not be longer than 10 characters']
|
|
def on(attribute)
|
|
errors = @errors[attribute.to_s]
|
|
return nil if errors.nil?
|
|
errors.size == 1 ? errors.first : errors
|
|
end
|
|
|
|
alias :[] :on
|
|
|
|
# A method to return errors assigned to +base+ object through add_to_base, which returns nil, if no errors are
|
|
# associated with the specified +attribute+, the error message if one error is associated with the specified +attribute+,
|
|
# or an array of error messages if more than one error is associated with the specified +attribute+.
|
|
#
|
|
# ==== Examples
|
|
# my_account = Account.find(1)
|
|
# my_account.errors.on_base
|
|
# # => nil
|
|
#
|
|
# my_account.errors.add_to_base("This account is frozen")
|
|
# my_account.errors.on_base
|
|
# # => "This account is frozen"
|
|
#
|
|
# my_account.errors.add_to_base("This account has been closed")
|
|
# my_account.errors.on_base
|
|
# # => ["This account is frozen", "This account has been closed"]
|
|
#
|
|
def on_base
|
|
on(:base)
|
|
end
|
|
|
|
# Yields each attribute and associated message per error added.
|
|
#
|
|
# ==== Examples
|
|
# my_person = Person.new(params[:person])
|
|
#
|
|
# my_person.errors.add('login', 'can not be empty') if my_person.login == ''
|
|
# my_person.errors.add('password', 'can not be empty') if my_person.password == ''
|
|
# messages = ''
|
|
# my_person.errors.each {|attr, msg| messages += attr.humanize + " " + msg + "<br />"}
|
|
# messages
|
|
# # => "Login can not be empty<br />Password can not be empty<br />"
|
|
#
|
|
def each
|
|
@errors.each_key { |attr| @errors[attr].each { |msg| yield attr, msg } }
|
|
end
|
|
|
|
# Yields each full error message added. So Person.errors.add("first_name", "can't be empty") will be returned
|
|
# through iteration as "First name can't be empty".
|
|
#
|
|
# ==== Examples
|
|
# my_person = Person.new(params[:person])
|
|
#
|
|
# my_person.errors.add('login', 'can not be empty') if my_person.login == ''
|
|
# my_person.errors.add('password', 'can not be empty') if my_person.password == ''
|
|
# messages = ''
|
|
# my_person.errors.each_full {|msg| messages += msg + "<br/>"}
|
|
# messages
|
|
# # => "Login can not be empty<br />Password can not be empty<br />"
|
|
#
|
|
def each_full
|
|
full_messages.each { |msg| yield msg }
|
|
end
|
|
|
|
# Returns all the full error messages in an array.
|
|
#
|
|
# ==== Examples
|
|
# my_person = Person.new(params[:person])
|
|
#
|
|
# my_person.errors.add('login', 'can not be empty') if my_person.login == ''
|
|
# my_person.errors.add('password', 'can not be empty') if my_person.password == ''
|
|
# messages = ''
|
|
# my_person.errors.full_messages.each {|msg| messages += msg + "<br/>"}
|
|
# messages
|
|
# # => "Login can not be empty<br />Password can not be empty<br />"
|
|
#
|
|
def full_messages
|
|
full_messages = []
|
|
|
|
@errors.each_key do |attr|
|
|
@errors[attr].each do |msg|
|
|
next if msg.nil?
|
|
|
|
if attr == "base"
|
|
full_messages << msg
|
|
else
|
|
full_messages << [attr.humanize, msg].join(' ')
|
|
end
|
|
end
|
|
end
|
|
full_messages
|
|
end
|
|
|
|
def clear
|
|
@errors = {}
|
|
end
|
|
|
|
# Returns the total number of errors added. Two errors added to the same attribute will be counted as such
|
|
# with this as well.
|
|
#
|
|
# ==== Examples
|
|
# my_person = Person.new(params[:person])
|
|
# my_person.errors.size
|
|
# # => 0
|
|
#
|
|
# my_person.errors.add('login', 'can not be empty') if my_person.login == ''
|
|
# my_person.errors.add('password', 'can not be empty') if my_person.password == ''
|
|
# my_person.error.size
|
|
# # => 2
|
|
#
|
|
def size
|
|
@errors.values.inject(0) { |error_count, attribute| error_count + attribute.size }
|
|
end
|
|
|
|
alias_method :count, :size
|
|
alias_method :length, :size
|
|
|
|
# Grabs errors from the XML response.
|
|
def from_xml(xml)
|
|
clear
|
|
humanized_attributes = @base.attributes.keys.inject({}) { |h, attr_name| h.update(attr_name.humanize => attr_name) }
|
|
messages = Array.wrap(Hash.from_xml(xml)['errors']['error']) rescue []
|
|
messages.each do |message|
|
|
attr_message = humanized_attributes.keys.detect do |attr_name|
|
|
if message[0, attr_name.size + 1] == "#{attr_name} "
|
|
add humanized_attributes[attr_name], message[(attr_name.size + 1)..-1]
|
|
end
|
|
end
|
|
|
|
add_to_base message if attr_message.nil?
|
|
end
|
|
end
|
|
end
|
|
|
|
# Module to support validation and errors with Active Resource objects. The module overrides
|
|
# Base#save to rescue ActiveResource::ResourceInvalid exceptions and parse the errors returned
|
|
# in the web service response. The module also adds an +errors+ collection that mimics the interface
|
|
# of the errors provided by ActiveRecord::Errors.
|
|
#
|
|
# ==== Example
|
|
#
|
|
# Consider a Person resource on the server requiring both a +first_name+ and a +last_name+ with a
|
|
# <tt>validates_presence_of :first_name, :last_name</tt> declaration in the model:
|
|
#
|
|
# person = Person.new(:first_name => "Jim", :last_name => "")
|
|
# person.save # => false (server returns an HTTP 422 status code and errors)
|
|
# person.valid? # => false
|
|
# person.errors.empty? # => false
|
|
# person.errors.count # => 1
|
|
# person.errors.full_messages # => ["Last name can't be empty"]
|
|
# person.errors.on(:last_name) # => "can't be empty"
|
|
# person.last_name = "Halpert"
|
|
# person.save # => true (and person is now saved to the remote service)
|
|
#
|
|
module Validations
|
|
def self.included(base) # :nodoc:
|
|
base.class_eval do
|
|
alias_method_chain :save, :validation
|
|
end
|
|
end
|
|
|
|
# Validate a resource and save (POST) it to the remote web service.
|
|
def save_with_validation
|
|
save_without_validation
|
|
true
|
|
rescue ResourceInvalid => error
|
|
errors.from_xml(error.response.body)
|
|
false
|
|
end
|
|
|
|
# Checks for errors on an object (i.e., is resource.errors empty?).
|
|
#
|
|
# ==== Examples
|
|
# my_person = Person.create(params[:person])
|
|
# my_person.valid?
|
|
# # => true
|
|
#
|
|
# my_person.errors.add('login', 'can not be empty') if my_person.login == ''
|
|
# my_person.valid?
|
|
# # => false
|
|
def valid?
|
|
errors.empty?
|
|
end
|
|
|
|
# Returns the Errors object that holds all information about attribute error messages.
|
|
def errors
|
|
@errors ||= Errors.new(self)
|
|
end
|
|
end
|
|
end
|