diff options
Diffstat (limited to 'activesupport/lib/active_support/cache.rb')
| -rw-r--r-- | activesupport/lib/active_support/cache.rb | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/activesupport/lib/active_support/cache.rb b/activesupport/lib/active_support/cache.rb index 914390eef1..bc114e0785 100644 --- a/activesupport/lib/active_support/cache.rb +++ b/activesupport/lib/active_support/cache.rb @@ -198,10 +198,17 @@ module ActiveSupport # cache.fetch('city') # => "Duckburgh" # # You may also specify additional options via the +options+ argument. - # Setting <tt>force: true</tt> will force a cache miss: + # Setting <tt>force: true</tt> forces a cache "miss," meaning we treat + # the cache value as missing even if it's present. Passing a block is + # required when `force` is true so this always results in a cache write. # # cache.write('today', 'Monday') - # cache.fetch('today', force: true) # => nil + # cache.fetch('today', force: true) { 'Tuesday' } # => 'Tuesday' + # cache.fetch('today', force: true) # => ArgumentError + # + # The `:force` option is useful when you're calling some other method to + # ask whether you should force a cache write. Otherwise, it's clearer to + # just call `Cache#write`. # # Setting <tt>:compress</tt> will store a large cache entry set by the call # in a compressed format. @@ -292,6 +299,8 @@ module ActiveSupport else save_block_result_to_cache(name, options) { |_name| yield _name } end + elsif options && options[:force] + raise ArgumentError, 'Missing block: Calling `Cache#fetch` with `force: true` requires a block.' else read(name, options) end |