remove field name from object validation message

In rails 3.2.6, you can set this in a locale file (e.g., config/locales/en.yml):

en:  errors:    format: "%{message}"

Otherwise, the default format is "%{attribute} %{message}".

One way to have complete control over the messages is to use a custom validate block in the model. e.g. to check that a field is not blank it would be like this:

class MyModel < ActiveRecord::Base  validate do |model|    model.errors.add_to_base("My Custom message") if user.field.blank?  endend

add_to_base is intended for adding messages that aren't related to a particular individual field (e.g. if a combination of multiple fields is illegal). This means that the CSS to highlight your invalid field won't get added. You can work arround this by also adding a nil message to the errors for your field e.g.

model.errors.add(:field, nil)

Alternatively, check out custom-err-message plugin - this plugin gives you the option to not have your custom validation error message prefixed with the attribute name.

Update:

add_to_base is deprecated since Rails 3. The following can be used instead:model_instance.errors.add(:base, "Msg")
Ref: https://apidock.com/rails/ActiveRecord/Errors/add_to_base

You can use errors.add_to_base http://api.rubyonrails.org/classes/ActiveRecord/Errors.html#M001712