diff options
author | Joe Van Dyk <joevandyk@gmail.com> | 2017-10-25 19:52:21 -0700 |
---|---|---|
committer | GitHub <noreply@github.com> | 2017-10-25 19:52:21 -0700 |
commit | e5ce7bcbae1a9eaa40d9e094ae43e3b9226324cf (patch) | |
tree | fa544bd02a1629d814b2486d8f0ddac423f8097d /activerecord | |
parent | 802678d3dc27f1659c7bbdc5c0bbb86af2b25349 (diff) | |
download | rails-e5ce7bcbae1a9eaa40d9e094ae43e3b9226324cf.tar.gz rails-e5ce7bcbae1a9eaa40d9e094ae43e3b9226324cf.tar.bz2 rails-e5ce7bcbae1a9eaa40d9e094ae43e3b9226324cf.zip |
remove incorrect statement about serializable transactions
using serializable isolation would prevent the duplicate insert as done in the example from happening
Diffstat (limited to 'activerecord')
-rw-r--r-- | activerecord/lib/active_record/validations/uniqueness.rb | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/validations/uniqueness.rb b/activerecord/lib/active_record/validations/uniqueness.rb index f4ad58c087..4c2c5dd852 100644 --- a/activerecord/lib/active_record/validations/uniqueness.rb +++ b/activerecord/lib/active_record/validations/uniqueness.rb @@ -205,9 +205,7 @@ module ActiveRecord # | # Boom! We now have a duplicate # | # title! # - # This could even happen if you use transactions with the 'serializable' - # isolation level. The best way to work around this problem is to add a unique - # index to the database table using + # The best way to work around this problem is to add a unique index to the database table using # {connection.add_index}[rdoc-ref:ConnectionAdapters::SchemaStatements#add_index]. # In the rare case that a race condition occurs, the database will guarantee # the field's uniqueness. |