为什么我尝试保存 mongoose 模型时会出错？

Question

我正在尝试在 Node.JS 中创建用于重置用户密码的控制器。 这个想法是根据重置密码令牌从数据库中获取用户，进行一些验证更新相关字段并将其保存回数据库。 但是，尝试保存更新的用户时出现错误（“user.save 不是函数”）。 可能是什么原因？

我有一个用户模型定义如下：

const mongoose = require("mongoose");
const validator = require("validator");
const bcrypt = require("bcrypt");
const jwt = require("jsonwebtoken");
const crypto = require("crypto");

const userSchema = new mongoose.Schema({
  name: {
    type: String,
    required: [true, "Please enter valid name"],
    maxLength: [30, "Your name cannot exceed 30 characters]"],
  },
  email: {
    type: String,
    required: [true, "Please enter valid email"],
    unique: true,
    validate: [validator.isEmail, "Please enter valid email address"],
  },
  password: {
    type: String,
    requires: [true, "Please enter your password"],
    minLength: [6, "Your password must be at least 6 characters"],
    select: false,
  },
  avatar: {
    public_id: { type: String, required: true },
    url: { type: String, required: true },
  },
  role: { type: String, default: "user" },
  createdAt: { type: Date, default: new Date().now },
  resetPasswordToken: { type: String },
  resetPasswordExpire: { type: Date },
});

userSchema.pre("save", async function (next) {
  if (!this.isModified("password")) {
    next();
  }
  this.password = await bcrypt.hash(this.password, 10);
});

// check password matching
userSchema.methods.isPasswordMatched = async function (inputPassword) {
  return await bcrypt.compare(inputPassword, this.password);
};

// return JSON Web Token
userSchema.methods.getJwtToken = function () {
  return jwt.sign({ id: this.id }, process.env.JWT_SECRET, {
    expiresIn: process.env.JWT_EXPIRESIN_TIME,
  });
};

// Generate password token
userSchema.methods.getResetPasswordToken = function () {
  // Generate Token
  const resetToken = crypto.randomBytes(20).toString("hex");

  // Hash token
  this.resetPasswordToken = crypto
    .createHash("sha256")
    .update(resetToken)
    .digest("hex");

  // set expired time
  this.resetPasswordExpire = new Date(Date.now() + 30 * 60 * 1000);

  return resetToken;
};

module.exports = mongoose.model("User", userSchema);

当我尝试重置用户密码时，我会尝试以下操作：

  // get the user document from db (make sure token and expiration time are valid)
let user = User.findOne({
    resetPasswordToken: resetPasswordToken,
    resetPasswordExpire: { $gt: Date.now() },
  });

// update password
  user.password = req.body.password;
  user.resetPasswordToken = undefined;
  user.resetPasswordExpire = undefined;
  user.save();
  sendToken(user, 200, res);

由于某种原因，我收到一个错误： "errorMsg": "user.save 不是函数"

可能是什么问题？

Answer 1

可能用户为空或未定义，因此您应该处理用户空条件。 还有findOne和save返回promise，所以需要在它们前面加上await关键字。

另外，您在用户架构密码字段中有错字，requires 应该是 required。

let user = await User.findOne({
  resetPasswordToken: resetPasswordToken,
  resetPasswordExpire: { $gt: Date.now() },
});

if (user) {
  // update password
  user.password = req.body.password;
  user.resetPasswordToken = undefined;
  user.resetPasswordExpire = undefined;
  await user.save();
  sendToken(user, 200, res);
} else {
  res.status(400).send("No user found");
}

如果你让用户为空，你需要在 findOne 中修复你的查询。

Answer 2

使用 await 关键字让猫鼬水合响应

let user = await User.findOne({
        resetPasswordToken: resetPasswordToken,
        resetPasswordExpire: { $gt: Date.now() },
      });
    
    // update password
      user.password = req.body.password;
      user.resetPasswordToken = undefined;
      user.resetPasswordExpire = undefined;
      user.save();
      sendToken(user, 200, res);

或者你可以这样做

await User.findOneAndUpdate({
        resetPasswordToken: resetPasswordToken,
        resetPasswordExpire: { $gt: Date.now() },
      },{password : req.body.password, resetPasswordToken : undefined, 
      resetPasswordExpire : undefined,});