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Caching is a cheap way of speeding up slow applications by keeping the result of calculations, renderings, and database calls around for subsequent requests.

You can read more about each approach by clicking the modules below.

Note: To turn off all caching, 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.

Configuration examples (FileStore 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')
Namespace
Methods
C
V
Included Modules
Instance Public methods
view_cache_dependencies()
# File actionpack/lib/action_controller/caching.rb, line 75
def view_cache_dependencies
  self.class._view_cache_dependencies.map { |dep| instance_exec(&dep) }.compact
end
Instance Protected methods
cache(key, options = {}, &block)

Convenience accessor.

# File actionpack/lib/action_controller/caching.rb, line 81
def cache(key, options = {}, &block)
  if cache_configured?
    cache_store.fetch(ActiveSupport::Cache.expand_cache_key(key, :controller), options, &block)
  else
    yield
  end
end