Data binding Grails数据绑定怀疑

CarroInstance正在保存，但carroMovelInstance没有保存。我想不出来。任何帮助都将不胜感激。

您从未要求carroMovelInstance保存。。。carro实例没有对carroMovel实例的引用，因此没有级联保存，因为您从未调用过

carroMovelInstance.save（）

但是，简单地利用Grails的数据绑定可能更简单，而不是不必要地创建关联和手动绑定参数

 def save2 = {

                def carroInstance = new Carro()
                def carroMovelInstance = new CarroMovel()

                carroInstance.name = params.name
                carroInstance.marca = params.marca
                carroInstance.matricula = params.matricula

                carroMovelInstance.prop1 = params.carroMovel.prop1
                carroMovelInstance.prop2 = params.carroMovel.prop2
                carroMovelInstance.prop3 = params.carroMovel.prop3

                carroInstance.save()
                carroMovelInstance.carro = carroInstance
                carroMovelInstance.save()                 

            }

---

阅读Grails，特别是关于关联的部分。此外，请阅读以了解对父域对象的

save（）

调用如何（或不会）级联到关联的域对象。

我复制它时出错。最后一行应该是：“carroMovelInstance.save（）”

 def save2 = {

                def carroInstance = new Carro()
                def carroMovelInstance = new CarroMovel()

                carroInstance.name = params.name
                carroInstance.marca = params.marca
                carroInstance.matricula = params.matricula

                carroMovelInstance.prop1 = params.carroMovel.prop1
                carroMovelInstance.prop2 = params.carroMovel.prop2
                carroMovelInstance.prop3 = params.carroMovel.prop3

                carroInstance.save()
                carroMovelInstance.carro = carroInstance
                carroMovelInstance.save()                 

            }

// Update your Carro domain.
def Carro {
    String name
    String marca
    String matricula

    // will cause persistence operations to cascade from CarroMovel to Carro
    static belongsTo = CarroMovel
}

// Update your save2 action.
// By passing 'params' to the CarroMovel constructor, Grails will bind request
// parameters to domain properties of the same name; it even works with associations!
def save2 = {
    def carroMovelInstance = new CarroMovel(params)
    if(carroMovelInstance.validate) {
        carroMovelInstance.save()
    }
}