diff options
Diffstat (limited to 'railties/guides/source/action_view_overview.textile')
| -rw-r--r-- | railties/guides/source/action_view_overview.textile | 103 |
1 files changed, 100 insertions, 3 deletions
diff --git a/railties/guides/source/action_view_overview.textile b/railties/guides/source/action_view_overview.textile index 40cde6ad84..2c0b81121f 100644 --- a/railties/guides/source/action_view_overview.textile +++ b/railties/guides/source/action_view_overview.textile @@ -16,7 +16,7 @@ Action View and Action Controller are the two major components of Action Pack. I Action View templates are written using embedded Ruby in tags mingled with HTML. To avoid cluttering the templates with boilerplate code, a number of helper classes provide common behavior for forms, dates, and strings. It's also easy to add new helpers to your application as it evolves. -Note: Some features of Action View are tied to Active Record, but that doesn't mean that Action View depends on Active Record. Action View is an independent package that can be used with any sort of backend. +NOTE. Some features of Action View are tied to Active Record, but that doesn't mean that Action View depends on Active Record. Action View is an independent package that can be used with any sort of backend. h3. Using Action View with Rails @@ -570,7 +570,7 @@ stylesheet_link_tag :monkey # => h5. auto_discovery_link_tag -Returns a link tag that browsers and news readers can use to auto-detect an RSS or ATOM feed. +Returns a link tag that browsers and news readers can use to auto-detect an RSS or Atom feed. <ruby> auto_discovery_link_tag(:rss, "http://www.example.com/feed.rss", {:title => "RSS Feed"}) # => @@ -585,6 +585,14 @@ Computes the path to an image asset in the +public/images+ directory. Full paths image_path("edit.png") # => /images/edit.png </ruby> +h5. image_url + +Computes the url to an image asset in the +public/images+ directory. This will call +image_path+ internally and merge with your current host or your asset host. + +<ruby> +image_url("edit.png") # => http://www.example.com/images/edit.png +</ruby> + h5. image_tag Returns an html image tag for the source. The source can be a full path or a file that exists in your +public/images+ directory. @@ -629,6 +637,14 @@ Computes the path to a JavaScript asset in the +public/javascripts+ directory. I javascript_path "common" # => /javascripts/common.js </ruby> +h5. javascript_url + +Computes the url to a JavaScript asset in the +public/javascripts+ directory. This will call +javascript_path+ internally and merge with your current host or your asset host. + +<ruby> +javascript_url "common" # => http://www.example.com/javascripts/common.js +</ruby> + h5. stylesheet_link_tag Returns a stylesheet link tag for the sources specified as arguments. If you don't specify an extension, +.css+ will be appended automatically. @@ -659,11 +675,19 @@ Computes the path to a stylesheet asset in the +public/stylesheets+ directory. I stylesheet_path "application" # => /stylesheets/application.css </ruby> +h5. stylesheet_url + +Computes the url to a stylesheet asset in the +public/stylesheets+ directory. This will call +stylesheet_path+ internally and merge with your current host or your asset host. + +<ruby> +stylesheet_url "application" # => http://www.example.com/stylesheets/application.css +</ruby> + h4. AtomFeedHelper h5. atom_feed -This helper makes building an ATOM feed easy. Here's a full usage example: +This helper makes building an Atom feed easy. Here's a full usage example: *config/routes.rb* @@ -1124,6 +1148,79 @@ If <tt>@post.author_id</tt> is 1, this would return: </select> </html> +h5. collection_radio_buttons + +Returns +radio_button+ tags for the collection of existing return values of +method+ for +object+'s class. + +Example object structure for use with this method: + +<ruby> +class Post < ActiveRecord::Base + belongs_to :author +end + +class Author < ActiveRecord::Base + has_many :posts + def name_with_initial + "#{first_name.first}. #{last_name}" + end +end +</ruby> + +Sample usage (selecting the associated Author for an instance of Post, +@post+): + +<ruby> +collection_radio_buttons(:post, :author_id, Author.all, :id, :name_with_initial) +</ruby> + +If <tt>@post.author_id</tt> is 1, this would return: + +<html> +<input id="post_author_id_1" name="post[author_id]" type="radio" value="1" checked="checked" /> +<label for="post_author_id_1">D. Heinemeier Hansson</label> +<input id="post_author_id_2" name="post[author_id]" type="radio" value="2" /> +<label for="post_author_id_2">D. Thomas</label> +<input id="post_author_id_3" name="post[author_id]" type="radio" value="3" /> +<label for="post_author_id_3">M. Clark</label> +</html> + +h5. collection_check_boxes + +Returns +check_box+ tags for the collection of existing return values of +method+ for +object+'s class. + +Example object structure for use with this method: + +<ruby> +class Post < ActiveRecord::Base + has_and_belongs_to_many :author +end + +class Author < ActiveRecord::Base + has_and_belongs_to_many :posts + def name_with_initial + "#{first_name.first}. #{last_name}" + end +end +</ruby> + +Sample usage (selecting the associated Authors for an instance of Post, +@post+): + +<ruby> +collection_check_boxes(:post, :author_ids, Author.all, :id, :name_with_initial) +</ruby> + +If <tt>@post.author_ids</tt> is [1], this would return: + +<html> +<input id="post_author_ids_1" name="post[author_ids][]" type="checkbox" value="1" checked="checked" /> +<label for="post_author_ids_1">D. Heinemeier Hansson</label> +<input id="post_author_ids_2" name="post[author_ids][]" type="checkbox" value="2" /> +<label for="post_author_ids_2">D. Thomas</label> +<input id="post_author_ids_3" name="post[author_ids][]" type="checkbox" value="3" /> +<label for="post_author_ids_3">M. Clark</label> +<input name="post[author_ids][]" type="hidden" value="" /> +</html> + h5. country_options_for_select Returns a string of option tags for pretty much any country in the world. |