AR::Check

Enable PostgreSQL's CHECK constraints on ActiveRecord migrations.

Installation

Add this line to your application's Gemfile:

gem "ar-check"

And then execute:

$ bundle

Or install it yourself as:

$ gem install ar-check

Usage

To create a CHECK constraint, just use the method add_check.

create_table :employees do |t|
  t.integer :salary, null: false
end

add_check :employees, :positive_salary, "salary > 0"

This will generate a new constraint using the following SQL statement:

ALTER TABLE employees
ADD CONSTRAINT positive_salary_on_things
CHECK (salary > 0)

To remove it, just using remove_check.

remove_check :employees, :positive_salary

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/fnando/ar-check. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License