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| author | Joost Baaij <joost@spacebabies.nl> | 2011-10-25 13:57:24 +0300 |
|---|---|---|
| committer | Joost Baaij <joost@spacebabies.nl> | 2011-10-25 13:57:24 +0300 |
| commit | 80bcfb00f71dbacd6af0a76429faa5d104ae3a36 (patch) | |
| tree | 0a6dbd594233a4a2328e8e9016790c3e88c16b91 /activerecord/lib/active_record/locking | |
| parent | 7c6d4377b85a4e534f627a8b6ea126d74a7bb039 (diff) | |
| download | rails-80bcfb00f71dbacd6af0a76429faa5d104ae3a36.tar.gz rails-80bcfb00f71dbacd6af0a76429faa5d104ae3a36.tar.bz2 rails-80bcfb00f71dbacd6af0a76429faa5d104ae3a36.zip | |
Added a note that optimistic locking also needs a hidden field to function across web workers.
Diffstat (limited to 'activerecord/lib/active_record/locking')
| -rw-r--r-- | activerecord/lib/active_record/locking/optimistic.rb | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/locking/optimistic.rb b/activerecord/lib/active_record/locking/optimistic.rb index 2df3309648..1a29ded787 100644 --- a/activerecord/lib/active_record/locking/optimistic.rb +++ b/activerecord/lib/active_record/locking/optimistic.rb @@ -37,6 +37,9 @@ module ActiveRecord # You're then responsible for dealing with the conflict by rescuing the exception and either rolling back, merging, # or otherwise apply the business logic needed to resolve the conflict. # + # This locking mechanism will function inside a single Ruby process. To make it work across all + # web requests, the recommended approach is to add +lock_version+ as a hidden field to your form. + # # You must ensure that your database schema defaults the +lock_version+ column to 0. # # This behavior can be turned off by setting <tt>ActiveRecord::Base.lock_optimistically = false</tt>. |