diff options
Diffstat (limited to 'railties/guides/source/active_record_validations_callbacks.textile')
-rw-r--r-- | railties/guides/source/active_record_validations_callbacks.textile | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/railties/guides/source/active_record_validations_callbacks.textile b/railties/guides/source/active_record_validations_callbacks.textile index e9ff6197ec..0824ba450c 100644 --- a/railties/guides/source/active_record_validations_callbacks.textile +++ b/railties/guides/source/active_record_validations_callbacks.textile @@ -96,7 +96,7 @@ To verify whether or not an object is valid, Rails uses the +valid?+ method. You <ruby> class Person < ActiveRecord::Base - validates_presence_of :name + validates :name, :presence => true end Person.create(:name => "John Doe").valid? # => true @@ -109,7 +109,7 @@ Note that an object instantiated with +new+ will not report errors even if it's <ruby> class Person < ActiveRecord::Base - validates_presence_of :name + validates :name, :presence => true end >> p = Person.new @@ -141,13 +141,13 @@ end h4(#validations_overview-errors). +errors[]+ -To verify whether or not a particular attribute of an object is valid, you can use +errors[:attribute]+ that returns an array with all attribute errors, when there are no errors on the specified attribute, an empty array is returned. +To verify whether or not a particular attribute of an object is valid, you can use +errors[:attribute]+. It returns an array of all the errors for +:attribute+. If there are no errors on the specified attribute, an empty array is returned. This method is only useful _after_ validations have been run, because it only inspects the errors collection and does not trigger validations itself. It's different from the +ActiveRecord::Base#invalid?+ method explained above because it doesn't verify the validity of the object as a whole. It only checks to see whether there are errors found on an individual attribute of the object. <ruby> class Person < ActiveRecord::Base - validates_presence_of :name + validates :name, :presence => true end >> Person.new.errors[:name].any? # => false @@ -355,7 +355,7 @@ This helper validates that the specified attributes are not empty. It uses the + <ruby> class Person < ActiveRecord::Base - validates_presence_of :name, :login, :email + validates :name, :login, :email, :presence => true end </ruby> @@ -505,7 +505,7 @@ class Person < ActiveRecord::Base validates_numericality_of :age, :on => :update # the default (validates on both create and update) - validates_presence_of :name, :on => :save + validates :name, :presence => true, :on => :save end </ruby> @@ -603,7 +603,7 @@ Returns an OrderedHash with all errors. Each key is the attribute name and the v <ruby> class Person < ActiveRecord::Base - validates_presence_of :name + validates :name, :presence => true validates_length_of :name, :minimum => 3 end @@ -623,7 +623,7 @@ h4(#working_with_validation_errors-errors-2). +errors[]+ <ruby> class Person < ActiveRecord::Base - validates_presence_of :name + validates :name, :presence => true validates_length_of :name, :minimum => 3 end @@ -699,7 +699,7 @@ The +clear+ method is used when you intentionally want to clear all the messages <ruby> class Person < ActiveRecord::Base - validates_presence_of :name + validates :name, :presence => true validates_length_of :name, :minimum => 3 end @@ -723,7 +723,7 @@ The +size+ method returns the total number of error messages for the object. <ruby> class Person < ActiveRecord::Base - validates_presence_of :name + validates :name, :presence => true validates_length_of :name, :minimum => 3 validates_presence_of :email end @@ -824,10 +824,10 @@ Here is a simple example where we change the Rails behaviour to always display t ActionView::Base.field_error_proc = Proc.new do |html_tag, instance| if instance.error_message.kind_of?(Array) %(#{html_tag}<span class="validation-error"> - #{instance.error_message.join(',')}</span>) + #{instance.error_message.join(',')}</span>).html_safe else %(#{html_tag}<span class="validation-error"> - #{instance.error_message}</span>) + #{instance.error_message}</span>).html_safe end end </ruby> @@ -1160,8 +1160,6 @@ config.active_record.observers = :mailer_observer h3. Changelog -"Lighthouse ticket":http://rails.lighthouseapp.com/projects/16213/tickets/26-active-record-validations-and-callbacks - * July 20, 2010: Fixed typos and rephrased some paragraphs for clarity. "Jaime Iniesta":http://jaimeiniesta.com * May 24, 2010: Fixed document to validate XHTML 1.0 Strict. "Jaime Iniesta":http://jaimeiniesta.com * May 15, 2010: Validation Errors section updated by "Emili ParreƱo":http://www.eparreno.com |