diff options
author | Emilio Tagua <miloops@gmail.com> | 2010-12-20 11:23:07 -0300 |
---|---|---|
committer | Emilio Tagua <miloops@gmail.com> | 2010-12-20 11:23:07 -0300 |
commit | 02fc6fbccdd3345e95592cc14e7855e2f1ea14b3 (patch) | |
tree | b26b91e2b2fad62ec382c9cee4ca2ac318f09257 /railties/guides/source/active_record_validations_callbacks.textile | |
parent | 2ba06b48defaca940e7c878724e2fb1c090eaa92 (diff) | |
parent | 0cbfd6c28d327304432f7d0c067662b5c1e41a78 (diff) | |
download | rails-02fc6fbccdd3345e95592cc14e7855e2f1ea14b3.tar.gz rails-02fc6fbccdd3345e95592cc14e7855e2f1ea14b3.tar.bz2 rails-02fc6fbccdd3345e95592cc14e7855e2f1ea14b3.zip |
Merge remote branch 'rails/master' into identity_map
Conflicts:
activerecord/lib/active_record/associations/association_proxy.rb
activerecord/lib/active_record/autosave_association.rb
activerecord/lib/active_record/base.rb
activerecord/lib/active_record/persistence.rb
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, 13 insertions, 13 deletions
diff --git a/railties/guides/source/active_record_validations_callbacks.textile b/railties/guides/source/active_record_validations_callbacks.textile index f7ef33bc1f..a15571fe58 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> @@ -414,7 +414,7 @@ class Person < ActiveRecord::Base validates_with GoodnessValidator end -class GoodnessValidator < ActiveRecord::Validator +class GoodnessValidator < ActiveModel::Validator def validate if record.first_name == "Evil" record.errors[:base] << "This person is evil" @@ -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> |