Question

PublicTraining Class

class PublicTraining{
    static hasMany = [trainingOrder: TrainingOrder]
}

和TrainingOrder Class

class TrainingOrder {
    Date createdOn

    static mapping = {
        sort id:"asc"
    }
}

如果我想获得所有培训订单

def orders = publicTrainingInstance.trainingOrder.sort()
println orders // [59,58] (id of orders)

不提供已排序的订单

Answer 1

默认sort()对Comparable对象很有用。如果您的课程不是Comparable，请使用：

def orders = publicTrainingInstance.trainingOrder.sort { it.id }

该代码将使用传递的id进行排序。