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rails--rails/actionview/lib/action_view/template
Łukasz Strzałkowski 2d3a6a0cb8 Action Pack Variants
By default, variants in the templates will be picked up if a variant is set
and there's a match. The format will be:

  app/views/projects/show.html.erb
  app/views/projects/show.html+tablet.erb
  app/views/projects/show.html+phone.erb

If request.variant = :tablet is set, we'll automatically be rendering the
html+tablet template.

In the controller, we can also tailer to the variants with this syntax:

  class ProjectsController < ActionController::Base
    def show
      respond_to do |format|
        format.html do |html|
          @stars = @project.stars

          html.tablet { @notifications = @project.notifications }
          html.phone  { @chat_heads    = @project.chat_heads }
        end

        format.js
        format.atom
      end
    end
  end

The variant itself is nil by default, but can be set in before filters, like
so:

  class ApplicationController < ActionController::Base
    before_action do
      if request.user_agent =~ /iPad/
        request.variant = :tablet
      end
    end
  end

This is modeled loosely on custom mime types, but it's specifically not
intended to be used together. If you're going to make a custom mime type,
you don't need a variant. Variants are for variations on a single mime
types.
2013-12-04 00:13:16 +01:00
..
handlers optimize string literals in erb templates 2013-12-03 14:56:14 -08:00
error.rb ActionView::MissingTemplate for partials includes underscore. 2013-12-02 08:35:34 +01:00
handlers.rb
resolver.rb Action Pack Variants 2013-12-04 00:13:16 +01:00
text.rb
types.rb Remove deprecated cattr_* requires 2013-12-03 00:28:15 +02:00