Mongoose Schema 钩子和打字稿：属性不存在答案

【问题标题】：Mongoose Schema hook and typescript: property does not existsMongoose Schema 钩子和打字稿：属性不存在
【发布时间】：2020-04-29 03:36:10
【问题描述】：

我正在尝试在typescript 中使用Mongoose 创建一个简单用户Schema

import mongoose, { Schema, Document } from "mongoose";
import bcrypt from "bcrypt";

const SALT_WORK_FACTOR = 10;

interface IUser extends Document {
  username: string;
  password: string;
  email: string;
  activeMembership: () => boolean;
  membershipExpires: Date;
  registeredOn: Date;
  lastLogin: Date;
  isAdmin: boolean;
}

const userSchema: Schema<IUser> = new Schema({
  username: { type: String, required: true },
  password: { type: String, required: true },
  email: { type: String, required: true },
  activeMembership: { type: Boolean, required: true, default: false },
  membershipExpires: { type: Number, required: true, default: 0 },
  registeredOn: { type: Date, required: true },
  lastLogin: { type: Date },
  isAdmin: { type: Boolean, required: true, default: false }
});

userSchema.pre("save", function (next) {
  const user = this;
  if (!user.isModified("password")) return next();

  bcrypt.genSalt(SALT_WORK_FACTOR, (err, salt) => {
    if (err) throw err;
    bcrypt.hash(user.password, salt, (err, hash) => {
      if (err) throw err;
      user.password = hash;
      next();
    });
  });
});

但是打字稿一直在抱怨：

tsserver says Property 'password' does not exist on type 'Document'.

上线：

bcrypt.hash(user.password, salt, (err, hash) => {

和：

      user.password = hash;

我做错了什么？

【问题讨论】：

标签： typescript mongoose

【解决方案1】：

尝试使用通用赋值<IUser>：

userSchema.pre<IUser>("save", function (next) {
  const user = this;
  if (!user.isModified("password")) return next();

  bcrypt.genSalt(SALT_WORK_FACTOR, (err, salt) => {
    if (err) throw err;
    bcrypt.hash(user.password, salt, (err, hash) => {
      if (err) throw err;
      user.password = hash;
      next();
    });
  });
});

希望对您有所帮助！

【讨论】：