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 Base.perform_caching = false.
All the caching stores from ActiveSupport::Cache is 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):
ActionController::Base.cache_store = :memory_store
ActionController::Base.cache_store = :file_store, "/path/to/cache/directory"
ActionController::Base.cache_store = :drb_store, "druby://localhost:9192"
ActionController::Base.cache_store = :mem_cache_store, "localhost"
ActionController::Base.cache_store = MyOwnStore.new("parameter")
# File vendor/rails/actionpack/lib/action_controller/caching.rb, line 50
50: def self.cache_configured?
51: perform_caching && cache_store
52: end
Defines the storage option for cached fragments
# File vendor/rails/actionpack/lib/action_controller/caching.rb, line 40
40: def self.cache_store=(store_option)
41: @@cache_store = ActiveSupport::Cache.lookup_store(store_option)
42: end