def book = Book.get(1)
book.delete()delete
Purpose
Deletes a persistent instance.
Examples
Description
The delete method informs the persistence context that a persistent instance should be deleted. Equivalent to the Hibernate delete method.
| Calling deleteon a transient instance will result in an error | 
Parameters:
- 
flush- If set totruethe persistent context will be flushed resulting in the instance being deleted immediately. For example:
def book = Book.get(1)
book.delete(flush: true)