rroblak / activemodel-subset-validator

Activemodel::Subset::Validator

This is a subset validator for Rails 4. It's usually used to validate an array, though any object with an include? method will work.

A proc or lambda may also specified for more complex validation.

Installation

Add this line to your application's Gemfile:

gem 'activemodel-subset-validator'

And then execute:

$ bundle

Or install it yourself as:

$ gem install activemodel-subset-validator

Usage

class Person < ActiveRecord::Base
  validates_subset_of :fantasies,   :in => ['unicorns', 'rainbows', 'horsies']
  validates_subset_of :ages,        :in => 0..99
  validates_subset_of :animals,     :in => ['dogs', 'cats', 'frogs'], :message => "%{value} is not a subset of the list"
  validates_subset_of :ingredients, :in => lambda{ |f| f.type == 'fruit' ? ['apples', 'bananas'] : ['lettuce', 'carrots'] }
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