Grails组合键报错 no generator CompositeIdentity

Question

问一个组合键的问题, 类定义是这样的:
class A{
String id
static hasMany = [b: B]
}
class B implements Serializable {
def A a1
def A a2
static belongsTo = [a1: A, a2: A]
static hasMany = [a1: A, a2: A]
static mapping = {
id composite: ['a1','a2']
}

equals和hashCode方法...

}

问题是: 报错 No such property: generator for class: org.codehaus.groovy.grails.orm.hibernate.cfg.CompositeIdentity,
怎么办?

Answer 1

the composite key is not supported by plugin scaffolding.