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| -rw-r--r-- | guides/source/upgrading_ruby_on_rails.md | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/guides/source/upgrading_ruby_on_rails.md b/guides/source/upgrading_ruby_on_rails.md index 9c67391e8f..03be99e8f0 100644 --- a/guides/source/upgrading_ruby_on_rails.md +++ b/guides/source/upgrading_ruby_on_rails.md @@ -432,6 +432,20 @@ symbol access is no longer supported. This is also the case for `store_accessors` based on top of `json` or `hstore` columns. Make sure to use string keys consistently. +### Explicit block use for `ActiveSupport::Callbacks` + +Rails 4.1 now expects an explicit block to be passed when calling +`ActiveSupport::Callbacks.set_callback`. This change stems from +`ActiveSupport::Callbacks` being largely rewritten for the 4.1 release. + +```ruby +# Rails 4.1 +set_callback :save, :around, ->(r, block) { stuff; result = block.call; stuff } + +# Rails 4.0 +set_callback :save, :around, ->(r, &block) { stuff; result = block.call; stuff } +``` + Upgrading from Rails 3.2 to Rails 4.0 ------------------------------------- |