Grails是否在不使用domain.delete()时级联删除？

Question

来自Grails网站:http://www.grails.org/doc/1.0.x/guide/5.%20Object%20Relational%20Mapping%20( GORM).html

class Airport {
 String name
 static hasMany = [flights:Flight]
}
class Flight {
 String number
 static belongsTo = [airport:Airport]
}

然后调用delete()机场实例将删除任何关联的Flight对象(因为它们属于机场).如果我要删除机场,executeUpdate我还能期望它删除机票吗？

谢谢

Answer 1

它不是。这是一个简单的例子：

 def a0 = new Airport(name: 'Dulles').save()
 def f0 = new Flight(number: '1000', airport: a0).save()

 assert 1 == Airport.count()
 assert 1 == Flight.count()

 Airport.executeUpdate("delete Airport a where a.name = 'Dulles'")

产量（略）：

Caused by: java.sql.SQLException: Integrity constraint violation FKB4318470B2E8D1BA table: FLIGHT in statement [delete from airport where name='Dulles']
        at org.hsqldb.jdbc.Util.throwError(Unknown Source)
        at org.hsqldb.jdbc.jdbcPreparedStatement.executeUpdate(Unknown Source)
        at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102)
        ... 27 more

有一个未解决的 Hibernate 问题，要求能够在此处的查询中指定级联。

此处的Grails 邮件列表也对此进行了备份。