ValidateMe offers common sense validations for your ActiveRecord models. Since it relies on different ActiveRecord abstractions it is database agnostic.

Add this line to your application's Gemfile:

gem 'validate_me'

And then execute:

$ bundle

Or install it yourself as:

$ gem install validate_me

Usage is simple, just add include ::ValidateMe to whichever ActiveRecord models you would like to have the built-in validations that will match your database constraints.

class User < ApplicationRecord
  include ::ValidateMe
end

ValidateMe will validate null constraints, uniqueness (including scope), and limits. See the below examples for more details

Example migration:

  create_table :users do |t|
    t.string :first_name, limit: 10, null: false
    t.string :last_name, null: false
    t.string :email, null: false, index: { unique: true }
    t.integer :phone_number, limit: 1
  end

The following validations will be added to your model:

validates :first_name, presence: true
validates :last_name,  presence: true
validates :email,      presence: true

validates :first_name, length: { maximum: 10 }
validates :phone_number, numericality: { greater_than: -127, less_than: 127 }, allow_nil: true

validates :email, uniqueness: true

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.

Bug reports and pull requests are welcome on GitHub at https://github.com/lollar/validate_me. 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.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the ValidateMe project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.