This plugin gives you the option to not have your custom validation error message prefixed with the attribute name.

This works with Rails 4 and I'm adding support for Rails 5.

gem 'custom_error_message', git: 'https://github.com/rystraum/custom-err-msg.git'

Sometimes generated error messages don't make sense.

validates_acceptance_of :accepted_terms, :message => 'Please accept the terms of service'

This generates the error message:

Accepted terms Please accept the terms of service

This plugin uses the caret (^) to omit the name of the attribute from error messages:

validates_acceptance_of :accepted_terms, :message => '^Please accept the terms of service'

This now generates:

Please accept the terms of service

Also omit the attribute name if the localization starts with a caret (^)

en: activerecord: errors: models: thing: attributes: name: blank: "^What do we call your work if you don't name it? :)"

This plugin was originally written by David Easley ([email protected])