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Diffstat (limited to 'guides/source/action_view_overview.md')
| -rw-r--r-- | guides/source/action_view_overview.md | 87 |
1 files changed, 34 insertions, 53 deletions
diff --git a/guides/source/action_view_overview.md b/guides/source/action_view_overview.md index 71f3f8882c..44c02165db 100644 --- a/guides/source/action_view_overview.md +++ b/guides/source/action_view_overview.md @@ -356,7 +356,39 @@ Supposing we use the same `_box` partial from above, this would produce the same View Paths ---------- -TODO... +When rendering the view for a request, the controller needs to resolve where to find each of the directories are located. + +We are able to modify the order these locations are resolved by using `prepend_view_path` and `append_view_path`. + +This allows us to add new paths to the beginning or end of the list used to resolve these paths. + +### Prepend view path + +This can be helpful for example, when we want to prepend a different directory for subdomains. + +We can do this by using: + +```prepend_view_path "app/views/#{request.subdomain}"``` + +Then our list becomes something like: + +``` +[ + ~/rails_app/app/views/<subdomain>, + ~/rails_app/app/views, + # ... +] +``` + +This will put the subdomain path at the beginning of the list. + +### Append view path + +Similarly, we can append paths: + +```append_view_path "app/views/direct"```. + +This will add ```app/views/direct``` and the end of lookup paths for views. Overview of helpers provided by Action View ------------------------------------------- @@ -376,39 +408,13 @@ config.action_controller.asset_host = "assets.example.com" image_tag("rails.png") # => <img src="http://assets.example.com/images/rails.png" alt="Rails" /> ``` -#### register_javascript_expansion - -Register one or more JavaScript files to be included when symbol is passed to javascript_include_tag. This method is typically intended to be called from plugin initialization to register JavaScript files that the plugin installed in `vendor/assets/javascripts`. - -```ruby -ActionView::Helpers::AssetTagHelper.register_javascript_expansion monkey: ["head", "body", "tail"] - -javascript_include_tag :monkey # => - <script src="/assets/head.js"></script> - <script src="/assets/body.js"></script> - <script src="/assets/tail.js"></script> -``` - -#### register_stylesheet_expansion - -Register one or more stylesheet files to be included when symbol is passed to `stylesheet_link_tag`. This method is typically intended to be called from plugin initialization to register stylesheet files that the plugin installed in `vendor/assets/stylesheets`. - -```ruby -ActionView::Helpers::AssetTagHelper.register_stylesheet_expansion monkey: ["head", "body", "tail"] - -stylesheet_link_tag :monkey # => - <link href="/assets/head.css" media="screen" rel="stylesheet" /> - <link href="/assets/body.css" media="screen" rel="stylesheet" /> - <link href="/assets/tail.css" media="screen" rel="stylesheet" /> -``` - #### auto_discovery_link_tag Returns a link tag that browsers and feed 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" }) # => - <link rel="alternate" type="application/rss+xml" title="RSS Feed" href="http://www.example.com/feed" /> + <link rel="alternate" type="application/rss+xml" title="RSS Feed" href="http://www.example.com/feed.rss" /> ``` #### image_path @@ -1361,22 +1367,6 @@ date_field_tag "dob" Provides functionality for working with JavaScript in your views. -#### button_to_function - -Returns a button that'll trigger a JavaScript function using the onclick handler. Examples: - -```ruby -button_to_function "Greeting", "alert('Hello world!')" -button_to_function "Delete", "if (confirm('Really?')) do_delete()" -button_to_function "Details" do |page| - page[:details].visual_effect :toggle_slide -end -``` - -#### define_javascript_functions - -Includes the Action Pack JavaScript libraries inside a single `script` tag. - #### escape_javascript Escape carrier returns and single and double quotes for JavaScript segments. @@ -1397,15 +1387,6 @@ alert('All is good') </script> ``` -#### link_to_function - -Returns a link that will trigger a JavaScript function using the onclick handler and return false after the fact. - -```ruby -link_to_function "Greeting", "alert('Hello world!')" -# => <a onclick="alert('Hello world!'); return false;" href="#">Greeting</a> -``` - ### NumberHelper Provides methods for converting numbers into formatted strings. Methods are provided for phone numbers, currency, percentage, precision, positional notation, and file size. |