How in Rails in CRUD-e in the form to change the text of the button to "save" if edit?

Question

Ruby on Rails

There is a default form _form - for adding and editing.
By default, the button text is 'submit', what is the condition to set to find out if it is create or edit?

Answer 1

If the form is for a model object, then you can rely on the "new_record?"

Answer 2

Put the text "Save" or "Save" and do not suffer with such a trifle.