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Diffstat (limited to 'activerecord/CHANGELOG')
| -rw-r--r-- | activerecord/CHANGELOG | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/activerecord/CHANGELOG b/activerecord/CHANGELOG index dc18983ff6..8a7b638f18 100644 --- a/activerecord/CHANGELOG +++ b/activerecord/CHANGELOG @@ -1,5 +1,18 @@ *SVN* +* Row locking. Provide a locking clause with the :lock finder option or true for the default "FOR UPDATE". [Shugo Maeda] + # Obtain an exclusive lock on person 1 so we can safely increment visits. + Person.transaction do + # select * from people where id=1 for update + person = Person.find(1, :lock => true) + person.visits += 1 + person.save! + end + +* PostgreSQL: introduce allow_concurrency option which determines whether to use blocking or asynchronous #execute. Adapters with blocking #execute will deadlock Ruby threads. The default value is ActiveRecord::Base.allow_concurrency. [Jeremy Kemper] + +* Use a per-thread (rather than global) transaction mutex so you may execute concurrent transactions on separate connections. [Jeremy Kemper] + * Change AR::Base#to_param to return a String instead of a Fixnum. Closes #5320. [Nicholas Seckar] * Use explicit delegation instead of method aliasing for AR::Base.to_param -> AR::Base.id. #5299 (skaes@web.de) |