Method: ActiveRecord::ConnectionAdapters::QueryCache::Store#compute_if_absent

Defined in:
activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb

#compute_if_absent(key) ⇒ Object 



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# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 67

def compute_if_absent(key)
  check_version

  return yield unless @enabled

  if entry = @map.delete(key)
    return @map[key] = entry
  end

  if @max_size && @map.size >= @max_size
    @map.shift # evict the oldest entry
  end

  @map[key] ||= yield
end