我正在尝试在类构造函数中使用ES6解构,但遇到未知的令牌错误。这是一个例子:
// import / server / a-and-b.js
class A {
constructor(id) {
// make MongoDB call and store inside this variable
let {
firstName: this._FirstName // => Throws here
} = CollectionName.findOne({userId: id});
}
}
export class B extends A {
constructor(id) {
super(id);
}
get FirstName() {
return this._FirstName;
}
}
// import / server / test.js
import { B } from 'imports/server/a-and-b.js'
const b = new B('123')
const FirstName = b.FirstName;
相同的解构将在课堂外起作用:
// another-test.js
// make MongoDB call and store inside this variable
let {
firstName: FirstName // works fine
} = CollectionName.findOne({userId: id});
最佳答案
您的语法不正确。您试图做的事是不可能的。假设findOne方法是同步的,则需要执行以下操作:
constructor(id) {
// make MongoDB call and store inside this variable
let { firstName } = CollectionName.findOne({userId: id});
this._FirstName = firstName;
}