Question

我有一个这样的对象：

var newService = new Service({
     name: service.name,
     description: service.description,
     supplier: service.supplier,
     price: service.price,
     info_requires: []
});

这是模态Service

var serviceSchema = new Schema({
    name: String,
    description: String,
    supplier: String,
    price: Number,
    info_requires: [{
        name: String,
        type: Number, // 1-text 2-combobox 3-textarea
        limit: []
    }],
});

这是我的数据：

var services = [{ name: "Test", description: "Des", supplier: "Sup", price: 123, icon: "icon", type: 1, open: 1, info_requires: [ { name: "Age", type: 1, limit: [] }, { name: "Bla bla", type: 1, limit: [] } ] }]

我将数据推送到info_requires[]，如下所示：

newService.info_requires.push(service.info_requires[i])

或

newService.info_requires[i].name = (service.info_requires[i].name) 但它不能用于错误：Cannot set property 'name' of undefined？我做错了吗？

Answer 1

如果＆＃34;服务＆＃34;是您创建的自定义对象，这可能会起到作用

var service ={
 name: "",
 description: "",
 supplier: "",
 price: "",
 info_requires: []
};

service.info_requires.push(some_object);
new Service(service);

Answer 2

检查密钥是否存在，如果没有为密钥创建数组/对象，如

this.setState(...)

与

类似

if (newService.info_requires === undefined) {
    newService.info_requires = [];
}
newService.info_requires.push(service.info_requires[i]);

如何将对象推送到关键数组javascript？

2 个答案: