如何在ES6 / ES2015中编写猫鼬模型 [英] How to write a Mongoose model in ES6 / ES2015

问题描述

我想在ES6中编写我的猫鼬模型。基本上尽可能替换 module.exports 和其他ES5。这就是我所拥有的。

I want to write my mongoose model in ES6. Basically replace module.exports and other ES5 things wherever possible. Here is what I have.

import mongoose from 'mongoose'

class Blacklist extends mongoose.Schema {
  constructor() {
    super({
      type: String,
      ip: String,
      details: String,
      reason: String
    })
  }
}

export default mongoose.model('Blacklist', Blacklist)

我在控制台中看到此错误。

I see this error in the console.

if (!('pluralization' in schema.options)) schema.options.pluralization = this.options.pluralization;
                                 ^

TypeError: Cannot use 'in' operator to search for 'pluralization' in undefined

$ b $中搜索复数 b

推荐答案

我不确定在这种情况下为什么要尝试使用ES6类。 mongoose.Schema 是用于创建新架构的构造函数。

I'm not sure why you're attempting to use ES6 classes in this case. mongoose.Schema is a constructor to create new schemas. When you do

var Blacklist = mongoose.Schema({});

您正在使用该构造函数创建新的架构。构造函数的构造使其行为类似于

you are creating a new schema using that constructor. The constructor is designed so that behaves exactly like

var Blacklist = new mongoose.Schema({});

您的替代选择，

class Blacklist extends mongoose.Schema {

是创建子类模式类，但您实际上从未在任何地方实例化它

does is create a subclass of the schema class, but you never actually instantiate it anywhere

您需要这样做

export default mongoose.model('Blacklist', new Blacklist());

但我并不是很推荐。您所做的没有任何更多ES6y。前面的代码非常合理，是猫鼬的推荐API。

but I wouldn't really recommend it. There's nothing "more ES6y" about what you are doing. The previous code is perfectly reasonable and is the recommended API for Mongoose.

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