module ActionController::Caching
Caching is a cheap way of speeding up slow applications by keeping the result of calculations, renderings, and database calls around for subsequent requests. Action Controller affords you three approaches in varying levels of granularity: Page, Action, Fragment.
You can read more about each approach and the sweeping assistance by clicking the modules below.
Note: To turn off all caching and sweeping, set
config.action_controller.perform_caching = false.
Caching stores¶ ↑
All the caching stores from ActiveSupport::Cache are available to be used as backends for Action Controller caching. This setting only affects action and fragment caching as page caching is always written to disk.
Configuration examples (MemoryStore is the default):
config.action_controller.cache_store = :memory_store config.action_controller.cache_store = :file_store, "/path/to/cache/directory" config.action_controller.cache_store = :mem_cache_store, "localhost" config.action_controller.cache_store = :mem_cache_store, Memcached::Rails.new("localhost:11211") config.action_controller.cache_store = MyOwnStore.new("parameter")
Public Instance Methods
caching_allowed?()
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# File lib/action_controller/caching.rb, line 72 def caching_allowed? request.get? && response.status == 200 end
Protected Instance Methods
cache(key, options = {}) { || ... }
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Convenience accessor
# File lib/action_controller/caching.rb, line 78 def cache(key, options = {}, &block) if cache_configured? cache_store.fetch(ActiveSupport::Cache.expand_cache_key(key, :controller), options, &block) else yield end end