diff options
| -rw-r--r-- | railties/guides/source/getting_started.textile | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/railties/guides/source/getting_started.textile b/railties/guides/source/getting_started.textile index 01a3a1977a..0bcd50a1c4 100644 --- a/railties/guides/source/getting_started.textile +++ b/railties/guides/source/getting_started.textile @@ -685,6 +685,7 @@ The model file, +app/models/post.rb+ is about as simple as it can get: <ruby> class Post < ActiveRecord::Base + attr_accessible :content, :name, :title end </ruby> @@ -692,7 +693,9 @@ There isn't much to this file - but note that the +Post+ class inherits from +ActiveRecord::Base+. Active Record supplies a great deal of functionality to your Rails models for free, including basic database CRUD (Create, Read, Update, Destroy) operations, data validation, as well as sophisticated search support -and the ability to relate multiple models to one another. +and the ability to relate multiple models to one another. Another important part +of this file is +attr_accessible+. It specifies a whitelist of attributes that are +allowed to be updated in bulk (via +update_attributes+ for instance). h4. Adding Some Validation @@ -701,6 +704,8 @@ Open the +app/models/post.rb+ file and edit it: <ruby> class Post < ActiveRecord::Base + attr_accessible :content, :name, :title + validates :name, :presence => true validates :title, :presence => true, :length => { :minimum => 5 } @@ -1218,6 +1223,8 @@ You'll need to edit the +post.rb+ file to add the other side of the association: <ruby> class Post < ActiveRecord::Base + attr_accessible :content, :name, :title + validates :name, :presence => true validates :title, :presence => true, :length => { :minimum => 5 } @@ -1605,6 +1612,8 @@ model, +app/models/post.rb+, as follows: <ruby> class Post < ActiveRecord::Base + attr_accessible :content, :name, :title + validates :name, :presence => true validates :title, :presence => true, :length => { :minimum => 5 } @@ -1686,6 +1695,8 @@ edit tags via posts: <ruby> class Post < ActiveRecord::Base + attr_accessible :content, :name, :title, :tags_attributes + validates :name, :presence => true validates :title, :presence => true, :length => { :minimum => 5 } @@ -1703,6 +1714,10 @@ nested attributes (you'll handle that by displaying a "remove" checkbox on the view that you'll build shortly). The +:reject_if+ option prevents saving new tags that do not have any attributes filled in. +Also note we had to add +:tags_attributes+ to the +attr_accessible+ list. If +we didn't do this there would be a +MassAssignmentSecurity+ exception when we try to +update tags through our posts model. + We will modify +views/posts/_form.html.erb+ to render a partial to make a tag: <erb> |