(Quick Reference)
save
Purpose
Saves a new domain class instance or updates a modified persistent instance in the database, cascading updates to child instances if required.
Examples
def b = new Book(title: "The Shining")
b.save()
Description
The
save method informs the persistence context that an instance should be saved or updated. The object will not be persisted immediately unless the
flush argument is used:
The
save method returns
null if
validation failed and the instance was not persisted, or the instance itself if successful. This lets you use "Groovy truth" (
null is considered
false) to write code like the following:
if (!b.save()) {
b.errors.each {
println it
}
}Parameters:
validate (optional) - Set to false if validation should be skippedflush (optional) - When set to true flushes the persistence context, persisting the object immediately and updating the version column for optimistic lockinginsert (optional) - When set to true will force Hibernate to do a SQL INSERT; this is useful in certain situations (for example when using assigned ids) and Hibernate cannot detect whether to do an INSERT or an UPDATEfailOnError (optional) - When set to true the save method with throw a grails.validation.ValidationException if validation fails. This behavior may also be triggered by setting the grails.gorm.failOnError property in grails-app/conf/Config.groovy. If the Config property is set and the argument is passed to the method, the method argument will always take precedence. For more details about the config property and other GORM config options, see the GORM Configuration Options section of The User Guide.deepValidate (optional) - Determines whether associations of the domain instance should also be validated, i.e. whether validation cascades. This is true by default - set to false to disable cascading validation.
By default GORM classes are configured for optimistic locking, which is a feature of Hibernate that involves storing an incrementing version in the table. This value is only updated in the database when the Hibernate session is flushed.
