ActiveRecord Tablelocks
This gem adds table locking functionality to ActiveRecord. Every save and destroy action is already done using a transaction, but now you can add locking to this process to make sure you really have unique records.
Installation
Add this line to your application's Gemfile:
gem 'activerecord-tablelocks'
And then execute:
$ bundle
Or install it yourself as:
$ gem install activerecord-tablelocks
Usage
In your models use the following to lock the table when editing records:
class User < ActiveRecord::Base
validates :login, :uniqueness => true, :presence => true
# The following line enables locking to make sure the uniqueness constraint holds.
enable_locking
end
If you need to lock multiple table, you can specify this in two ways.
Using class names:
class EmailBox < ActiveRecord::Base
enable_locking :class_names => ['EmailAlias']
# The class name needs to be a String, but doesn't need to be in an Array.
# Don't forget to add validations, this gem doesn't do that for you.
end
Using table names:
class EmailAlias < ActiveRecord::Base
enable_locking :table_names => ['email_boxes']
# The table name needs to be a String, but doesn't need to be in an Array.
# The gem quotes the table name for you, so you don't need to that here.
# Don't forget to add validations, this gem doesn't do that for you.
end
Contributing
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request