module ActiveRecord::QueryCache::ClassMethods

def cache(&block)

If it's not, it will execute the given block.
Enable the query cache within the block if Active Record is configured. 
def cache(&block)
  if connected? || !configurations.empty?
    connection.cache(&block)
  else
    yield
  end
end

def uncached(&block)

If it's not, it will execute the given block.
Disable the query cache within the block if Active Record is configured. 
def uncached(&block)
  if connected? || !configurations.empty?
    connection.uncached(&block)
  else
    yield
  end
end