// load a single instance
def b = Book.load(1)
String title = b.title
...
// delete an instance without retrieving it
Book.load(1).delete()load
Purpose
Returns a proxy instance of the domain class for the given identifier.
Examples
Description
load usually returns a proxy for the instance which is initialized on-demand. The mapped identifier getter (normally getId()) can return the identifier without initializing the proxy. load() only returns null if the provided id is null, so you cannot use it to test for existence. If you provide an id for an instance that doesn’t exist, a proxy will be returned and an exception will be thrown when the instance is initialized.
Use ident() to obtain the mapped identifier, including renamed and composite keys, rather than assuming that a method named getId() exposes it. An overload of the mapped getter or a business method named getIdentifier() still invokes the entity implementation.
On an uninitialized Groovy-aware proxy, dynamic lookups such as proxy.getProperty('id') and proxy['id'] retain the shortcut to the mapped identifier. These lookups are not interchangeable with a direct getId() call when that method is not the mapped identifier getter.
If there is an existing instance with the same id in the Hibernate session or 2nd-level cache, load() will return that non-proxy instance instead of a proxy.
Parameters:
-
id- The id of the object to retrieve