diff options
Diffstat (limited to 'activesupport/lib/active_support/cache.rb')
| -rw-r--r-- | activesupport/lib/active_support/cache.rb | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/cache.rb b/activesupport/lib/active_support/cache.rb index e71f2673ab..e65e472d08 100644 --- a/activesupport/lib/active_support/cache.rb +++ b/activesupport/lib/active_support/cache.rb @@ -361,6 +361,9 @@ module ActiveSupport # the cache with the given keys, then that data is returned. Otherwise, # the supplied block is called for each key for which there was no data, # and the result will be written to the cache and returned. + # Therefore, you need to pass a block that returns the data to be written + # to the cache. If you do not want to write the cache when the cache is + # not found, use #read_multi. # # Options are passed to the underlying cache implementation. # @@ -374,6 +377,8 @@ module ActiveSupport # # "unknown_key" => "Fallback value for key: unknown_key" } # def fetch_multi(*names) + raise ArgumentError, "Missing block: `Cache#fetch_multi` requires a block." unless block_given? + options = names.extract_options! options = merged_options(options) results = read_multi(*names, options) |