diff options
Diffstat (limited to 'actionview/lib/action_view/helpers/cache_helper.rb')
| -rw-r--r-- | actionview/lib/action_view/helpers/cache_helper.rb | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/actionview/lib/action_view/helpers/cache_helper.rb b/actionview/lib/action_view/helpers/cache_helper.rb index 4db8930a26..0e2a5f90f4 100644 --- a/actionview/lib/action_view/helpers/cache_helper.rb +++ b/actionview/lib/action_view/helpers/cache_helper.rb @@ -110,6 +110,29 @@ module ActionView # <%= some_helper_method(person) %> # # Now all you'll have to do is change that timestamp when the helper method changes. + # + # === Automatic Collection Caching + # + # When rendering collections such as: + # + # <%= render @notifications %> + # <%= render partial: 'notifications/notification', collection: @notifications %> + # + # If the notifications/_notification partial starts with a cache call like so: + # + # <% cache notification do %> + # <%= notification.name %> + # <% end %> + # + # The collection can then automatically use any cached renders for that + # template by reading them at once instead of one by one. + # + # See ActionView::Template::Handlers::ERB.resource_cache_call_pattern for more + # information on what cache calls make a template eligible for this collection caching. + # + # The automatic cache multi read can be turned off like so: + # + # <%= render @notifications, cache: false %> def cache(name = {}, options = nil, &block) if controller.perform_caching safe_concat(fragment_for(cache_fragment_name(name, options), options, &block)) @@ -122,7 +145,7 @@ module ActionView # Cache fragments of a view if +condition+ is true # - # <%= cache_if admin?, project do %> + # <% cache_if admin?, project do %> # <b>All the topics on this project</b> # <%= render project.topics %> # <% end %> @@ -138,7 +161,7 @@ module ActionView # Cache fragments of a view unless +condition+ is true # - # <%= cache_unless admin?, project do %> + # <% cache_unless admin?, project do %> # <b>All the topics on this project</b> # <%= render project.topics %> # <% end %> @@ -161,6 +184,14 @@ module ActionView end end + # Given a key (as described in ActionController::Caching::Fragments.expire_fragment), + # returns a key suitable for use in reading, writing, or expiring a + # cached fragment. All keys are prefixed with <tt>views/</tt> and uses + # ActiveSupport::Cache.expand_cache_key for the expansion. + def fragment_cache_key(key) + ActiveSupport::Cache.expand_cache_key(key.is_a?(Hash) ? url_for(key).split("://").last : key, :views) + end + private def fragment_name_with_digest(name) #:nodoc: |