我试图在我的数据库中保存一个json对象。未调用save()函数,但永远不会保存json对象。 帮我解决问题。 我想这是与猫鼬的连接问题。 这是我的代码..
var config = require('../config');
var user = require('../user');
api.post('/addUser',function(req,res) {
var userID;
//creating a sample user under Model collection User.. so this becomes a document!!
console.log("addition of new user api hit!!");
//sending a query to retrieve the no of users served
MongoClient.connect(dbURL, function (err, db) {
var UserCountCursor = db.collection("ourusers").find({"docName": "userCount"}).limit(1);
UserCountCursor.each(function (err, doc) {
if (err)
console.log("did not get the count");
else
// var countString= JSON.stringify(doc);
//var docJson=JSON.parse(countString);
console.log("the json content is:" + doc.iparkoUserCount);
//increase the user count by 1 in the db.
var incCount = parseInt(doc.iparkoUserCount) + 1;
console.log("no of userrs:" + incCount);
// making an userId
userID = "ipkoID_C" + incCount.toString();
//updating using MOngoClient
db.collection("ourusers").update({"docName": "userCount"}, {$set: {"iparkoUserCount": incCount}});
console.log("the user count in the db has been updated!!");
console.log("generated id for this guy is:" + userID);
if (userID != null) {
console.log("calling the save function");
//closing the mongoclient connection
db.close();
signUpUser(userID);
}
});
});
function signUpUser(userIDD) {
var me = new user({
name: req.body.new_name,
password: req.body.new_pswd,
username: req.body.new_username,
phno: req.body.new_phn,
userId: userIDD
});
console.log("the obj ::" + JSON.stringify(me));
console.log("obj created and ready to be stored");
//connecting to the db using mongoose
mongoose.connect(config.database, function (err) {
if (err)
console.log("The error is :"+err);
else {
console.log("WE ARE CONNECTED USING MONGOOSE");
//saving the sample user document
me.save(function (err) {
console.log("in the save func");
if (err) throw err;
else {
console.log('User saved Successfully!!!!!');
res.json({
'whatStatus': 'user saved in the database!!',
'userID': userIDD
});
mongoose.connection.close();
}
});
}
});
}
});
我的控制台记录::
添加新用户api命中!! json的内容是:143 用户名:144 数据库中的用户数已更新!! 为这个人生成的id是:ipkoID_C144 调用保存功能 obj :: {"名称":" Abhi","密码":" jio","用户名": " abhijio"" PHNO":" 45142545""用户id":" ipkoID_C144"" _id& #34;:" 583295bfa0f9f8342035d3b9"} obj已创建并准备存储 C:\ Users \用户shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb的\ lib中\ utils.js:98 process.nextTick(function(){throw err;}); ^
TypeError:无法读取属性' iparkoUserCount'为null 在C:\ Users \ shivendra \ WebstormProjects \ iParko \ routes \ RegisteredParkingLots.js:76:57 在handleCallback(C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ lib \ utils.js:96:12) 在C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ lib \ cursor.js:742:16 在handleCallback(C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ lib \ utils.js:96:12) 在C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ lib \ cursor.js:676:5 at handleCallback(C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ node_modules \ mongodb-core \ lib \ cursor.js:156:5) at setCursorDeadAndNotified(C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ node_modules \ mongodb-core \ lib \ cursor.js:496:3) at nextFunction(C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ node_modules \ mongodb-core \ lib \ cursor.js:588:12) 在Cursor.next [as _next](C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ node_modules \ mongodb-core \ lib \ cursor.js:681:3) at nextObject(C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ lib \ cursor.js:673:8) 在Cursor.next(C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ lib \ cursor.js:262:12) at _each(C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ lib \ cursor.js:738:10) 在C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ lib \ cursor.js:746:7 在handleCallback(C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ lib \ utils.js:96:12) 在C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ lib \ cursor.js:676:5 at handleCallback(C:\ Users \ shivendra \ WebstormProjects \ iParko \ node_modules \ mongodb \ node_modules \ mongodb-core \ lib \ cursor.js:156:5)
使用退出代码1完成处理
答案 0 :(得分:0)
您似乎正在使用system ("grep -E 'Type|group|slack \\\(' $a ");
打开数据库连接两次,使用mongoose.connect
打开另一个数据库连接。这就是你收到错误的原因。
尝试仅使用一个连接,如下所示。
mongoose.connection.open()
答案 1 :(得分:0)
在UserCountCursor.each(...)
圈内,检查err
后,您还应该检查doc
。所以你有这个:
UserCountCursor.each(function (err, doc) {
if (err)
console.log("did not get the count");
else
// var countString= JSON.stringify(doc);
//...
})
改为:
UserCountCursor.each(function (err, doc) {
if (err){
console.log("did not get the count");
}else if(doc){
// var countString= JSON.stringify(doc);
//...
}
})
然后,您将避免Cannot read property 'iparkoUserCount' of null
错误,并且您将进入save()
功能。