[英]Unhandled promise rejection using node.js
I have this code below and it is giving me an error saying that I have unhandled promise rejection.我在下面有这段代码,它给了我一个错误,说我没有处理 promise 拒绝。 I am new at node.js and express, I do not know what I did wrong.
我是 node.js 和快递的新手,我不知道我做错了什么。
const User = require('../model/user');
const linkValidation = async (req, res, next) => {
var refer = req.params.refer;
if (refer) {
await User.findById(refer)
.then(user, async function() {
if (user) {
user.saldo = user.saldo + 10
user.invites.push({
nome: nome,
valor_recebido: 10
});
await user.save().catch(err =>{
return res.status(500).json(err)
})
}else{
return res.status(404).json({message: "Usuário que criou esse link não existe"})
}
}).catch(err =>{
return res.status(500).json(err)
})
}else{
return res.status(404).json({message: "Usuário que criou esse link não existe"})
}
next()
}
module.exports = linkValidation
The router I am using is:我使用的路由器是:
router.post('/cadastro/:refer', UserMiddleware, LinkMiddleware, UserController.create);
Can anyone help me?谁能帮我?
My main recommendation would be to only use async/await here.我的主要建议是在这里只使用 async/await。 I believe the way you are mixing async/await with.catch() and.then() is what is causing your error.
我相信您将 async/await 与 .catch() 和 .then() 混合的方式是导致您的错误的原因。
When using async/await, I think it is simplest to just use the try/catch block (rather than.catch) as I have shown below, and pass any thrown error to your error handler with next in the catch block.使用 async/await 时,我认为最简单的方法是使用如下所示的 try/catch 块(而不是 .catch),并将任何抛出的错误传递给您的错误处理程序,并在 catch 块中使用 next。
For example...例如...
const User = require('../model/user');
const linkValidation = async (req, res, next) => {
try {
const refer = req.params.refer;
const user = await User.findById(refer)
if (user) {
user.saldo = user.saldo + 10
user.invites.push({
nome: nome,
valor_recebido: 10
});
await user.save()
}
res.send('success')
} catch(err) {
next(err)
}
}
module.exports = linkValidation
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