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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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|---|---|---|
| .. | ||
| alternate_helpers | ||
| bad_customers | ||
| filter_test/implicit_actions | ||
| functional_caching | ||
| helpers | ||
| helpers1_pack | ||
| helpers2_pack | ||
| layouts | ||
| localized | ||
| multipart | ||
| old_content_type | ||
| post_test | ||
| public | ||
| respond_to | ||
| respond_with | ||
| session_autoload_test/session_autoload_test | ||
| star_star_mime | ||
| symlink_parent | ||
| test | ||
| _top_level_partial_only.erb | ||
| company.rb | ||
| ruby_template.ruby | ||
| shared.html.erb | ||