def b = new Book(title: "The Shining")
b.save()
println b.ident()ident
Purpose
Returns the value of the mapped identity property of the domain class, regardless of its name. For example, when the mapping uses id name: 'code', ident() returns the value of code. A generated identifier remains null until it has been assigned.
For a composite identity, ident() returns a separate serializable instance of the domain class with the mapped key properties copied into it, including any associations that form part of the key. Other properties retain their new-instance defaults. Pass the returned identifier to get() or load() to retrieve the entity.
An uninitialized proxy, such as one returned by load(), is the exception: ident() returns the identifier the proxy was created with and does not load the entity. For a composite identity, that is the object passed to load(), including any non-key properties set on it, rather than a new copy.
Examples
For a BookEdition mapped with id composite: ['isbn', 'edition']:
def bookEdition = new BookEdition(isbn: '9780307743657', edition: 1, title: 'The Shining')
bookEdition.save(flush: true, failOnError: true)
def identifier = bookEdition.ident()
assert identifier.isbn == bookEdition.isbn
assert identifier.edition == bookEdition.edition
assert !identifier.is(bookEdition)
def reloaded = BookEdition.get(identifier)
def reference = BookEdition.load(identifier)