Mongoose 的 loadClass() 和 TypeScript [英] Mongoose's loadClass() with TypeScript

问题描述

Mongoose 接受 ES6 类作为架构的基础.

Mongoose accepts an ES6 class as the basis for a schema.

来自该链接的示例:

class PersonClass {

  get fullName() {
    return `${this.firstName} ${this.lastName}`;    // compiler error
  }

}

PersonSchema.loadClass(PersonClass);

架构的属性没有在类中定义，所以 TypeScript 编译器说:

The schema's properties are not defined in the class, so the TypeScript compiler says:

PersonClass 类型上不存在属性 firstName.

Property firstName does not exist on type PersonClass.

一个技巧是使用虚拟构造函数:

A hack is to use a dummy constructor:

constructor(readonly firstName: string, readonly lastName: string) { }

然而，这是黑客行为，更难维护.

However that is hack, and harder to maintain.

有没有其他方法可以做到这一点，而不需要黑客攻击?

Is there some other way to do this, without hacks?

推荐答案

诀窍是使用 this IPerson 注释:

get fullName(this IPerson) {
    return `${this.firstName} ${this.lastName}`;
}

其中 IPerson 是该模式的相应接口.

Where IPerson is the corresponding interface for that schema.

这篇关于Mongoose 的 loadClass() 和 TypeScript的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！