OneOfManyValidator

Provides validation for when one of a set of fields is required not to be blank, but no one particular field is required on its own.

Add this line to your application's Gemfile:

gem 'one_of_many_validator'

And then execute:

$ bundle

Or install it yourself as:

$ gem install one_of_many_validator

A common use case is validating that a user provides either a mobile number or landline phone number.

You could do this like so:

validates_with OneOfManyValidator, :fields => [:mobile, :landline]

This will pass validation if either :mobile or :landline is provided, and will fail validation if both are blank.

The I18n key used will follow the Rails standard, so in this example the error key will be:

activerecord.errors.models.[model_name].attributes.mobile_and_landline_blank

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