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author | Mike Gunderloy <MikeG1@larkfarm.com> | 2008-10-19 16:57:02 -0500 |
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committer | Mike Gunderloy <MikeG1@larkfarm.com> | 2008-10-19 16:57:02 -0500 |
commit | 2e91fb84f0de5fa08a2ed03f3b74054b441788d3 (patch) | |
tree | 34676f8373a9d193e0be38b1c0272488f7278e68 /railties/doc/guides/getting_started_with_rails/getting_started_with_rails.txt | |
parent | b4f7ef6577622c634bbfa6f944f81eeefd2080fc (diff) | |
download | rails-2e91fb84f0de5fa08a2ed03f3b74054b441788d3.tar.gz rails-2e91fb84f0de5fa08a2ed03f3b74054b441788d3.tar.bz2 rails-2e91fb84f0de5fa08a2ed03f3b74054b441788d3.zip |
Fixes to Getting Started guide
Diffstat (limited to 'railties/doc/guides/getting_started_with_rails/getting_started_with_rails.txt')
-rw-r--r-- | railties/doc/guides/getting_started_with_rails/getting_started_with_rails.txt | 36 |
1 files changed, 23 insertions, 13 deletions
diff --git a/railties/doc/guides/getting_started_with_rails/getting_started_with_rails.txt b/railties/doc/guides/getting_started_with_rails/getting_started_with_rails.txt index b6d8203c8b..a58ef01e46 100644 --- a/railties/doc/guides/getting_started_with_rails/getting_started_with_rails.txt +++ b/railties/doc/guides/getting_started_with_rails/getting_started_with_rails.txt @@ -417,10 +417,9 @@ Rails includes methods to help you validate the data that you send to models. Op [source, ruby] ------------------------------------------------------- -class Comment < ActiveRecord::Base - belongs_to :post - validates_presence_of :commenter, :body - validates_length_of :commenter, :minimum => 5 +class Post < ActiveRecord::Base + validates_presence_of :name, :title + validates_length_of :title, :minimum => 5 end ------------------------------------------------------- @@ -439,19 +438,19 @@ After the console loads, you can use it to work with your application's models: [source, shell] ------------------------------------------------------- ->> c = Comment.create(:body => "A new comment") -=> #<Comment id: nil, commenter: nil, body: "A new comment", -post_id: nil, created_at: nil, updated_at: nil> ->> c.save +>> p = Post.create(:content => "A new post") +=> #<Post id: nil, name: nil, title: nil, content: "A new post", +created_at: nil, updated_at: nil> +>> p.save => false ->> c.errors -=> #<ActiveRecord::Errors:0x227be7c @base=#<Comment id: nil, -commenter: nil, body: "A new comment", post_id: nil, created_at: nil, -updated_at: nil>, @errors={"commenter"=>["can't be blank", +>> p.errors +=> #<ActiveRecord::Errors:0x23bcf0c @base=#<Post id: nil, name: nil, +title: nil, content: "A new post", created_at: nil, updated_at: nil>, +@errors={"name"=>["can't be blank"], "title"=>["can't be blank", "is too short (minimum is 5 characters)"]}> ------------------------------------------------------- -This code shows creating a new +Comment+ instance, attempting to save it and getting +false+ for a return value (indicating that the save failed), and inspecting the +errors+ of the comment. +This code shows creating a new +Post+ instance, attempting to save it and getting +false+ for a return value (indicating that the save failed), and inspecting the +errors+ of the comment. TIP: Unlike the development web server, the console does not automatically load your code afresh for each line. If you make changes, type +reload!+ at the console prompt to load them. @@ -818,6 +817,8 @@ You'll need to edit the +post.rb+ file to add the other side of the association: [source, ruby] ------------------------------------------------------- class Post < ActiveRecord::Base + validates_presence_of :name, :title + validates_length_of :title, :minimum => 5 has_many :comments end ------------------------------------------------------- @@ -930,6 +931,15 @@ end You'll see a bit more complexity here than you did in the controller for posts. That's a side-effect of the nesting that you've set up; each request for a comment has to keep track of the post to which the comment is attached. +In addition, the code takes advantage of some of the methods available for an association. For example, in the +new+ method, it calls + +[source, ruby] +------------------------------------------------------- +@comment = @post.comments.build +------------------------------------------------------- + +This creates a new +Comment+ object _and_ sets up the +post_id+ field to have the +id+ from the specified +Post+ object in a single operation. + === Building Views Because you skipped scaffolding, you'll need to build views for comments "by hand." Invoking +script/generate controller+ will give you skeleton views, but they'll be devoid of actual content. Here's a first pass at fleshing out the comment views. |