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Diffstat (limited to 'railties/guides/source/layouts_and_rendering.textile')
| -rw-r--r-- | railties/guides/source/layouts_and_rendering.textile | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/railties/guides/source/layouts_and_rendering.textile b/railties/guides/source/layouts_and_rendering.textile index 310a70ca9b..69ef05104c 100644 --- a/railties/guides/source/layouts_and_rendering.textile +++ b/railties/guides/source/layouts_and_rendering.textile @@ -515,7 +515,7 @@ h4. Using +redirect_to+ Another way to handle returning responses to an HTTP request is with +redirect_to+. As you've seen, +render+ tells Rails which view (or other asset) to use in constructing a response. The +redirect_to+ method does something completely different: it tells the browser to send a new request for a different URL. For example, you could redirect from wherever you are in your code to the index of photos in your application with this call: <ruby> -redirect_to photos_path +redirect_to photos_url </ruby> You can use +redirect_to+ with any arguments that you could use with +link_to+ or +url_for+. In addition, there's a special redirect that sends the user back to the page they just came from: @@ -1093,6 +1093,13 @@ In Rails 3.0, there is also a shorthand for this. Assuming +@products+ is a coll Rails determines the name of the partial to use by looking at the model name in the collection. In fact, you can even create a heterogeneous collection and render it this way, and Rails will choose the proper partial for each member of the collection: +In the event that the collection is empty, +render+ will return nil, so it should be fairly simple to provide alternative content. + +<erb> +<h1>Products</h1> +<%= render(@products) || 'There are no products available.' %> +</erb> + * +index.html.erb+ <erb> @@ -1187,15 +1194,3 @@ On pages generated by +NewsController+, you want to hide the top menu and add a That's it. The News views will use the new layout, hiding the top menu and adding a new right menu inside the "content" div. There are several ways of getting similar results with different sub-templating schemes using this technique. Note that there is no limit in nesting levels. One can use the +ActionView::render+ method via +render :template => 'layouts/news'+ to base a new layout on the News layout. If you are sure you will not subtemplate the +News+ layout, you can replace the +content_for?(:news_content) ? yield(:news_content) : yield+ with simply +yield+. - -h3. Changelog - -* April 4, 2010: Fixed document to validate XHTML 1.0 Strict. "Jaime Iniesta":http://jaimeiniesta.com -* January 25, 2010: Rails 3.0 Update by "Mikel Lindsaar":credits.html#raasdnil -* December 27, 2008: Merge patch from Rodrigo Rosenfeld Rosas covering subtemplates -* December 27, 2008: Information on new rendering defaults by "Mike Gunderloy":credits.html#mgunderloy -* November 9, 2008: Added partial collection counter by "Mike Gunderloy":credits.html#mgunderloy -* November 1, 2008: Added +:js+ option for +render+ by "Mike Gunderloy":credits.html#mgunderloy -* October 16, 2008: Ready for publication by "Mike Gunderloy":credits.html#mgunderloy -* October 4, 2008: Additional info on partials (+:object+, +:as+, and +:spacer_template+) by "Mike Gunderloy":credits.html#mgunderloy (not yet approved for publication) -* September 28, 2008: First draft by "Mike Gunderloy":credits.html#mgunderloy (not yet approved for publication) |