猫鼬验证错误，"email is not defined"

Question

我是猫鼬和快递的新手。我尝试创建一个简单的登录后端，但是当用发送帖子请求时

{"用户电子邮件"："abc@xyz&"密码"："pswrd"；}

我得到了"；电子邮件未定义"；其类型为"错误"的错误；验证"；。我的用户模式如下：

const mongoose = require("mongoose");
const bcrypt = require("bcrypt");
const UserSchema = new mongoose.Schema({
email: {
type: String,
required: [true, "Email is required"],
trim: true,
unique: true,
},
password: {
type: String,
trim: true,
required: [true, "Password is required"],
},
username: {
type: String,
required: [true, "Username is required"],
trim: true,
unique: true,
},
});
UserSchema.pre("save", async function (next) {
const user = await User.findOne({ email: this.email });
if (user) {
next(new Error(`${this.email} already taken`));
return;
}
const user1 = await User.findOne({ username: this.username });
if (user1) {
next(new Error(`${this.username} already taken`));
return;
}
const salt = await bcrypt.genSalt(8);
this.password = await bcrypt.hash(this.password, salt);
next();
});
// userSchema.statics is accessible by model
UserSchema.statics.findByCredentials = async (email, password) => {
const user = await User.findOne({ email });
if (!user) {
throw Error("User does not exist.");
}
const isMatch = await bcrypt.compare(password, user.password);
if (!isMatch) {
throw Error("Unable to login");
}
return user;
};
const User = mongoose.model("User", UserSchema);
module.exports = User;

我使用findByCredentials来检查用户是否在我的mongoDB数据库中。最后，我的login.js如下：

const express = require("express");
const mongoose = require("mongoose");
const User = require("../db/models/User");
const loginRouter = express.Router();
loginRouter.get("/api/login2", (req, res) => res.send("In Login"));
loginRouter.post("/api/login", async (req, res) => {
const { userEmail, password} = req.body;
if (!validateReqBody(userEmail, password)) {
return res
.status(401)
.send({ status: false, type: "INVALID", error: "invalid request body" });
}
try {
const newUser = new User({
email: userEmail,
password: password,
});
await newUser.findByCredentials(email, password);
} catch (error) {
const validationErr = getErrors(error);
console.log(validationErr);
return res
.status(401)
.send({ status: false, type: "VALIDATION", error: validationErr });
}
res.send({ status: true });
});
//user.find --> mongoose documentation
// Validates request body
const validateReqBody = (...req) => {
for (r of req) {
if (!r || r.trim().length == 0) {
return false;
}
}
return true;
};

// Checks errors returning from DB
const getErrors = (error) => {
if (error instanceof mongoose.Error.ValidationError) {
let validationErr = "";
for (field in error.errors) {
validationErr += `${field} `;
}
return validationErr.substring(0, validationErr.length - 1);
}
return error.message;
};

module.exports = { loginRouter };

谢谢。

Answer 1

您需要在后端中使用主体解析器中间件

const bodyParser = require('body-parser');
const express = require('express');
const app = express();
//bodypraser middleware
app.use(bodyParser.json());

你可以在这里阅读更多关于身体解析器

Answer 2

有一次发生在我身上，真的很烦人。我不知道这是否对你有帮助，但试着用fetch发送带有headers: { 'Content-Type': 'application/json' },的帖子请求。

Answer 3

findByCredentials((的定义在用户模型中。我试图通过我在login.js中创建的对象实例newUser来访问该函数。但是，我应该将该函数调用为User.findByCredentials(电子邮件，密码(。