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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.
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|---|---|---|
| .. | ||
| middleware_stack | ||
| request | ||
| routing | ||
| session | ||
| callbacks_test.rb | ||
| cookies_test.rb | ||
| debug_exceptions_test.rb | ||
| header_test.rb | ||
| live_response_test.rb | ||
| mapper_test.rb | ||
| middleware_stack_test.rb | ||
| mime_type_test.rb | ||
| mount_test.rb | ||
| prefix_generation_test.rb | ||
| rack_cache_test.rb | ||
| rack_test.rb | ||
| reloader_test.rb | ||
| request_id_test.rb | ||
| request_test.rb | ||
| response_test.rb | ||
| routing_assertions_test.rb | ||
| routing_test.rb | ||
| show_exceptions_test.rb | ||
| ssl_test.rb | ||
| static_test.rb | ||
| test_request_test.rb | ||
| test_response_test.rb | ||
| uploaded_file_test.rb | ||
| url_generation_test.rb | ||