如果您正在使用Hibernate,您应该能够使用HQL,使用a not in
和子查询(这是一个示例页面):
from Main as main where main.id not in (select map.main_id from Map as map)
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基于此页面,我相信您需要在Main.findAll
方法中执行此查询:
def results = Main.findAll("from Main as main where main.id not in (select map.main_id from Map as map)")
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