foca / sinatra-content-for

Sinatra extension to use a `content_for` helper similar to Rails'

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file .gitignore Thu May 07 06:58:41 -0700 2009 Gemspec, Rakefile, etc [foca]
file LICENSE Wed May 06 22:58:50 -0700 2009 Initial commit [foca]
file README.rdoc Mon May 18 23:53:54 -0700 2009 Update the readme (we now support haml) [foca]
file Rakefile Thu May 07 06:58:41 -0700 2009 Gemspec, Rakefile, etc [foca]
directory lib/ Sat May 09 10:19:25 -0700 2009 Add Haml support [mattly]
file sinatra-content-for.gemspec Sat May 09 10:21:13 -0700 2009 Push version to 0.2 This release adds: * Suppo... [foca]
directory test/ Sat May 09 10:19:25 -0700 2009 Add Haml support [mattly]
README.rdoc

ContentFor

Small extension for the Sinatra web framework that allows you to use the following helpers in your views: 

    <% content_for :some_key do %>
      <chunk of="html">...</chunk>
    <% end %>

    <% yield_content :some_key %>

This allows you to capture blocks inside views to be rendered later in this request. For example, to populate different parts of your layout from your view.

When using this with the Haml rendering engine, you should do the following: 

    - content_for :some_key do
      %chunk{ :of => "html" } ...

    = yield_content :some_key

Note that with ERB yield_content is called without an ’=’ block (<%= %>), but with Haml it uses = yield_content.

Using an ’=’ block in ERB will output the content twice for each block, so if you have problems with that, make sure to check for this.

Usage

If you’re writing "classic" style apps, then requring sinatra/content_for should be enough. If you’re writing "classy" apps, then you also need to call helpers Sinatra::ContentFor in your app definition.

And how is this useful?

For example, some of your views might need a few javascript tags and stylesheets, but you don’t want to force this files in all your pages. Then you can put <% yield_content :scripts_and_styles %> on your layout, inside the <head> tag, and each view can call content_for setting the appropriate set of tags that should be added to the layout.

Credits

Code by foca, inspired on the Ruby on Rails helpers with the same name. Haml support by mattly.