简短摘要: 如果你是从谷歌过来的,这就是解决方案:
module.exports = mongoose.models.User || mongoose.model("User", UserSchema);
如果您需要详细回答,请查看已接受的答案。
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我正在开发一个NextJS网站,后端使用了Mongoose和Express。每当我使用signUp函数时,在后端会出现以下错误:
{"name":"Test","hostname":"DESKTOP-K75DG72","pid":7072,"level":40,"route":"/api/v1/signup","method":"POST","errorMessage":"UserModel is not defined","msg":"","time":"2020-06-17T23:51:34.566Z","v":0}
我怀疑这个错误是因为我在其他控制器中使用了UserModel。在我创建一个新的控制器之前,这个错误并没有发生。所以我的问题是,如何解决这个问题/如何在不同的控制器/中间件中使用同一个模型?
我认为这个问题与node.js - Cannot overwrite model once compiled Mongoose这篇文章有关,我之前遇到过这个错误,但不知怎么修复它。
编辑:错误出现在models/User.js文件中的pre save middleware中,UserModel未定义在该级别上,如何验证用户是否已存在该用户名,如果是,则拒绝新文档?
在controllers/RegisterLogin.js [错误发生的地方]。
const UserModel = require("../models/User");
// More packages...
async function signUp(req, res) {
try {
const value = await signUpSchema.validateAsync(req.body);
const response = await axios({
method: "POST",
url: "https://hcaptcha.com/siteverify",
data: qs.stringify({
response: value.token,
secret: process.env.HCAPTCHA,
}),
headers: {
"content-type": "application/x-www-form-urlencoded;charset=utf-8",
},
});
if (!response.data.success) {
throw new Error(errorHandler.errors.HCAPTCHA_EXPIRED);
}
const hashPassword = await new Promise((res, rej) => {
bcrypt.hash(
value.password,
parseInt(process.env.SALTNUMBER, 10),
function (err, hash) {
if (err) rej(err);
res(hash);
}
);
});
await UserModel.create({
userName: value.username,
userPassword: hashPassword,
userBanned: false,
userType: "regular",
registeredIP: req.ip || "N/A",
lastLoginIP: req.ip || "N/A",
});
return res.status(200).json({
success: true,
details:
"Your user has been created successfully! Redirecting in 6 seconds",
});
} catch (err) {
const { message } = err;
if (errorHandler.isUnknownError(message)) {
logger.warn({
route: "/api/v1/signup",
method: "POST",
errorMessage: message,
});
}
return res.status(200).json({
success: false,
details: errorHandler.parseError(message),
});
}
}
module.exports = { signUp };
在控制器/个人资料.js [如果我在这里使用UserModel,它会破坏一切]
const UserModel = require("../models/User");
//plus other packages...
async function changePassword(req, res) {
try {
const value = await passwordChangeSchema.validateAsync(req.body);
const username = await new Promise((res, rej) => {
jwt.verify(value.token, process.env.PRIVATE_JWT, function (err, decoded) {
if (err) rej(err);
res(decoded.username);
});
});
const userLookup = await UserModel.find({ userName: username });
if (userLookup == null || userLookup.length == 0) {
throw new Error(errorHandler.errors.BAD_TOKEN_PROFILE);
}
const userLookupHash = userLookup[0].userPassword;
try {
// We wrap this inside a try/catch because the rej() doesnt reach block-level
await new Promise((res, rej) => {
bcrypt.compare(value.currentPassword, userLookupHash, function (
err,
result
) {
if (err) {
rej(errorHandler.errors.BAD_CURRENT_PASSWORD);
}
if (result == true) {
res();
} else {
rej(errorHandler.errors.BAD_CURRENT_PASSWORD);
}
});
});
} catch (err) {
throw new Error(err);
}
const hashPassword = await new Promise((res, rej) => {
bcrypt.hash(
value.newPassword,
parseInt(process.env.SALTNUMBER, 10),
function (err, hash) {
if (err) rej(err);
res(hash);
}
);
});
await UserModel.findOneAndUpdate(
{ userName: username },
{ userPassword: hashPassword }
);
return res.status(200).json({
success: true,
details: "Your password has been updated successfully",
});
} catch (err) {
const { message } = err;
if (errorHandler.isUnknownError(message)) {
logger.warn({
route: "/api/v1/changepassword",
method: "POST",
errorMessage: message,
});
}
return res.status(200).json({
success: false,
details: errorHandler.parseError(message),
});
}
}
在models/User.js文件中
const mongoose = require("mongoose");
const errorHandler = require("../helpers/errorHandler");
const Schema = mongoose.Schema;
const UserSchema = new Schema({
userName: String,
userPassword: String,
userBanned: Boolean,
userType: String,
registeredDate: { type: Date, default: Date.now },
registeredIP: String,
lastLoginDate: { type: Date, default: Date.now },
lastLoginIP: String,
});
UserSchema.pre("save", async function () {
const userExists = await UserModel.find({
userName: this.get("userName"),
})
.lean()
.exec();
if (userExists.length > 0) {
throw new Error(errorHandler.errors.REGISTER_USERNAME_EXISTS);
}
});
module.exports = mongoose.model("User", UserSchema);
errorHandler
是否需要require()
任何控制器? - thammada.tsmodels/User.js
有其他的require()
吗? - thammada.tsnpx madge --circular path/to/controllers/Profile.js
- thammada.ts