Method: Dalli::Client#fetch

Defined in:
lib/dalli/client.rb

#fetch(key, ttl = nil, options = nil) ⇒ Object

Fetch the value associated with the key. If a value is found, then it is returned.

If a value is not found and no block is given, then nil is returned.

If a value is not found (or if the found value is nil and :cache_nils is false) and a block is given, the block will be invoked and its return value written to the cache and returned.



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# File 'lib/dalli/client.rb', line 87

def fetch(key, ttl=nil, options=nil)
  options = options.nil? ? CACHE_NILS : options.merge(CACHE_NILS) if @options[:cache_nils]
  val = get(key, options)
  not_found = @options[:cache_nils] ?
    val == Dalli::Server::NOT_FOUND :
    val.nil?
  if not_found && block_given?
    val = yield
    add(key, val, ttl_or_default(ttl), options)
  end
  val
end