解决我无法将Post var保存在MongoDB中，因为我的User.findOne（email）无法正常工作
[英]RESOLVED I cant save the Post var in the MongoDB because my User.findOne(email) doesnt work
问题描述
I'm setting up a website backend. 
我正在建立一个网站后端。 When i run the register from the post my User.findOne(email) give this error message: 当我从帖子中运行注册时，我的User.findOne（email）会显示以下错误消息：
(node:10052) UnhandledPromiseRejectionWarning: ObjectParameterError: Parameter "filter" to findOne() must be an object, got arthurcastilhos@gmail.com at new ObjectParameterError (D:\\Arquivo de Programas\\Projetos VS Code\\devbook\\backend\\node_modules\\mongoose\\lib\\error\\objectParameter.js:25:11) at model.Query.Query.findOne (D:\\Arquivo de Programas\\Projetos VS Code\\devbook\\backend\\node_modules\\mongoose\\lib\\query.js:2135:16) at Function.findOne (D:\\Arquivo de Programas\\Projetos VS Code\\devbook\\backend\\node_modules\\mongoose\\lib\\model.js:2132:13) at D:\\Arquivo de Programas\\Projetos VS Code\\devbook\\backend\\src\\routes.js:40:27 at Layer.handle [as handle_request] (D:\\Arquivo de Programas\\Projetos VS Code\\devbook\\backend\\node_modules\\express\\lib\\router\\layer.js:95:5) at next (D:\\Arquivo de Programas\\Projetos VS Code\\devbook\\backend\\node_modules\\express\\lib\\router\\route.js:137:13) at Route.dispatch (D:\\Arquivo de Programas\\Projetos VS Code\\devbook\\backend\\node_modules\\express\\lib\\router\\route.js:
I already change the imsomnia id's, the parameter from the _id to user and the user from the email. 我已经更改了失眠ID，将参数从_id更改为user，并将用户从电子邮件更改为。
My routes.js: 我的routes.js：
const routes = require('express').Router();
const bcrypt = require('bcryptjs');
const User = require('./models/UserModel');
const Post = require('./controllers/PostController');
routes.get('/', (req, res) => {
return res.send('Hello, World!')
});
routes.post('/register', async (req, res) => {
try {
const user = await User.create(req.body);
return res.send({ user })
} catch {
return res.status(400).send({ error: 'Registration failed' })
}
});
routes.post('/auth', async (req, res) => {
const { email, password } = req.body;
const user = await User.findOne({ email }).select('+password');
if (!user){
return res.status(400).send({ error: 'User not found' });
};
if (!await bcrypt.compare(password, user.password)){
return res.status(400).send({ error: 'Invalid password '});
};
res.send({ user });
})
routes.post('/post', async (req, res) => {
const { text, email } = req.body //only test
const user = await User.findOne(email)
if (!user){
return res.status(400).send({ error: 'User not found' });
}
if (!text){
return res.status(400).send({ error: 'Text not found' });
}
res.send(text)
});
module.exports = routes;
I expect the register from the post to show it after in the homepage 我希望帖子中的注册信息可以在首页显示出来
SOLUTION: 解：
turn the const user = await User.findOne(email) to const user = await User.findOne({ email: email }) 将const user = await User.findOne(email)为const user = await User.findOne({ email: email })
1 个解决方案
解决方案1
0 2019-08-14 01:35:30
From the error message it seems like the call to findOne() is getting just the email string and not an object. 从错误消息看来，对findOne（）的调用似乎只是获取电子邮件字符串，而不是对象。 Why don't you use the same syntax you did in the other routes? 为什么不使用与其他路由相同的语法？
You wrote this in the /post route: 您是在/ post路由中编写的：
const user = await User.findOne(email)
But it seems like you should write this: 但是似乎您应该这样写：
const user = await User.findOne({ email } )
Correct? 正确？ Here is the top half of the route for reference, with the proposed correction: 这是路线的上半部分，供您参考，并提出了建议的更正方法：
routes.post('/post', async (req, res) => {
const { text, email } = req.body //only test
const user = await User.findOne({ email })
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