因此,假设我有两个类,每个类都需要另一个:

Department.js:

const Person = require("./Person");
class Department{
  constructor(id){
    this.personel = getPersonel(id).map(person => new Person(person));
  }
}


Person.js

const Department = require("./Department");
class Person {
  constructor(id){
    this.department = new Department(getDeptOfPerson(id));
  }
}
const person = new Person(1);
const coworkers = person.department.personel;


现在,这不起作用,我可以理解为什么。它说“ Person”不是Department.js的构造函数。但是,如果我将两个类都放在同一个文件中,则效果很好。

所以;我的问题是,我该如何解决?我真的不想将这两个类都放在同一个文件中-有更好的方法吗?

我正在运行最新版本的Node。

最佳答案

您可以将初始化对象与获取数据分开:

// types/Department.js
class Department {
  constructor(id, personnel) {
    this.id = id;
    this.personnel = personnel;
  }
}

// types/Person.js
class Person {
  constructor(id, department) {
    this.id = id;
    this.department = department;
  }
}

// findDepartment.js
const Department = require('./types/Department');
const Person = require('./types/Person');

function findDepartment(id) {
  const personnel = getPersonnel(id).map(person => new Person(person));
  return new Department(id, personnel);
}

// findPerson.js
const Department = require('./types/Department');
const Person = require('./types/Person');

function findPerson(id) {
  const department = getDeptOfPerson(id);
  return new Person(id, department);
}


如果您确实需要,甚至可以返回这些类型(findDepartment.jsDepartment.jsDepartment.findDepartment = function (id) { …)。

关于javascript - 在Node中递归地需要模块,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/47729564/

10-13 00:56