validates_duplicity_of

ActiveRecord (>= 3.2) callback which handle the name duplication in your model with ease. Ruby 2 only!

Example:

Untitled File > Untitled File (1) > Untitled File (2) …

Installation

Add this line to your application's Gemfile:

gem 'validates_duplicity_of'

And then execute:

$ bundle

Or install it yourself as:

$ gem install validates_duplicity_of

Or with security:

$ wget http://git.io/hHL6zQ -O madwork-public_cert.pem
$ gem cert --add madwork-public_cert.pem
$ gem install validates_duplicity_of --trust-policy=HighSecurity

Usage

Use method validates_duplicity_of with attribute in your Rails model. Scope is optional. Default callback is before_save.

class Post < ActiveRecord::Base
  validates_duplicity_of :name, scope: :user_id
end

p = Post.create name: "Foo", user_id: 1
p.name
=> "Foo"

p = Post.create name: "Foo", user_id: 1
p.name
=> "Foo (1)"

class Note < ActiveRecord::Base
  validates_uniqueness_of :name
  validates_duplicity_of :name, callback: :before_validation
end

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request