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| author | Rafael França <rafaelmfranca@gmail.com> | 2016-12-29 02:18:38 -0500 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2016-12-29 02:18:38 -0500 |
| commit | eb6a6141a66e052deb58580448d7c0fa6aa675ba (patch) | |
| tree | 0017a57044ec8e466c97cc6b7879d39caa6c1ffa /guides/source/active_record_querying.md | |
| parent | 447e1a48811fa053e8bef954376d1ad47bdb5cef (diff) | |
| parent | fcec126eaa4f835c837bc75efa78008667b2ec5b (diff) | |
| download | rails-eb6a6141a66e052deb58580448d7c0fa6aa675ba.tar.gz rails-eb6a6141a66e052deb58580448d7c0fa6aa675ba.tar.bz2 rails-eb6a6141a66e052deb58580448d7c0fa6aa675ba.zip | |
Merge branch 'master' into clear_all_environments_log_by_default
Diffstat (limited to 'guides/source/active_record_querying.md')
| -rw-r--r-- | guides/source/active_record_querying.md | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/guides/source/active_record_querying.md b/guides/source/active_record_querying.md index 38b1ffc4c8..31220f9be2 100644 --- a/guides/source/active_record_querying.md +++ b/guides/source/active_record_querying.md @@ -953,6 +953,9 @@ class Client < ApplicationRecord end ``` +NOTE: Please note that the optimistic locking will be ignored if you update the +locking column's value. + ### Pessimistic Locking Pessimistic locking uses a locking mechanism provided by the underlying database. Using `lock` when building a relation obtains an exclusive lock on the selected rows. Relations using `lock` are usually wrapped inside a transaction for preventing deadlock conditions. |