For the most part, I find that Rails default error messages for most of the built-in validators work fine for me. However, I also have a few validations on some models where the default "{{attribute}} {{message}}" full_message format just doesn't make any semantic sense. I know that I can display the messages instead of the full_messages, but that would mean I have to add in my own messages to every built-in validation, because otherwise the attribute name would be chopped off.
Is there a way to use the default full_message format, but to directly override the full_message for just a handful of validations to use a different format or a particular string? Is there a natural way to mix the default validation messages with a few custom ones that don't start with the attribute name?