[英]What am I doing wrong on my update function on nodejs/mongodb?
嗨,我目前對nodejs和mongodb並不熟悉,我想做的是創建一個函數來更新我的用戶圖表上的勝利,失敗,平局記錄。
我的架構:
UserSchema = new mongoose.Schema({
username:'string',
password:'string',
email:'string',
//Change Made
win:{ type: Number, default: 0 },
lose:{ type: Number, default: 0 },
draw:{ type: Number, default: 0 }
});
var db = mongoose.createConnection(app.get('MONGODB_CONN')),
User = db.model('users', UserSchema);
我的更新功能:
app.post('/user/updateScores',function(req, res){
try{
var query = req.body.username;
User.findOneAndUpdate(query, { win : req.body.win, lose : req.body.lose, draw : req.body.draw }, function (err,user){
if (err) res.json(err) ;
req.session.loggedIn = true;
res.redirect('/user/' + user.username);
});
}
catch(e){
console.log(e)
}
});
問題是當我嘗試更新時,它會更新當前數據,但會轉到空白頁並引發異常:
ReferenceError: win is not defined
at eval (eval at <anonymous> (C:\Users\ryan-utb\Desktop\RockScissorsPaper\node_modules\underscore\underscore.js:1176:16), <anonymous>:5:9)
at template (C:\Users\ryan-utb\Desktop\RockScissorsPaper\node_modules\underscore\underscore.js:1184:21)
at Function.exports.underscore.render (C:\Users\ryan-utb\Desktop\RockScissorsPaper\node_modules\consolidate\lib\consolidate.js:410:14)
at C:\Users\ryan-utb\Desktop\RockScissorsPaper\node_modules\consolidate\lib\consolidate.js:106:23
at C:\Users\ryan-utb\Desktop\RockScissorsPaper\node_modules\consolidate\lib\consolidate.js:90:5
at fs.js:266:14
at Object.oncomplete (fs.js:107:15)
但是我已經正確定義了勝利,這似乎是什么問題?
User.update(
{username:req.body.username},
{ win : req.body.win, lose : req.body.lose, draw : req.body.draw },
function (err, data) { //look - no argument name "user" - just "data"
//2 mistakes here that you should learn to never do
//1. Don't ignore the `err` argument
//2. Don't assume the query returns something. Check that data is not null.
console.log(data);
//The next line must be INSIDE this function in order to access "data"
res.redirect('/user/' + data.username);
});
//ACK don't try to access "data" (or "user") here. this is asynchronous code!
//this code executes EARLIER IN TIME than the User.update callback code
摘錄v2之后更新
find
呼叫根本不匹配任何文檔,因此user
為null findOneAndUpdate
操作同時進行查找和更新 User.update({
username: req.body.username
},{
$set: {
win : req.body.name,
loose : req.body.loose
}
}, function(err, result) {
if (err) {
console.log(err);
} else if (result === 0) {
console.log("user is not updated");
} else {
console.log("user is updated");
}
});
希望您能理解您的問題並可以更新您的用戶集合。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.