无法使用mongoose保存

借助以下方面的帮助：

1. https://stackoverflow.com/a/30164855/2168120

2. mongodb自动增量

app.js：

//some codes var mongoose = require('mongoose'); var connection = mongoose.createConnection("mongodb://localhost/dfp", function(err){ if(err){ console.log(err); }else{ console.log("connected to mongodb from app"); } }); 

模式：

 var userSchema = mongoose.Schema({email: String, fname: String, lname: String, password: String, gender: String, mobile: String, dob:{ type: Date, default: Date.now }, ip: String, doj:{ type: Date, default: Date.now } },{ collection : 'user' }); var user = mongoose.model('user',userSchema); var CounterSchema = mongoose.Schema({ _id: {type: String, required: true}, seq: { type: Number, default: 0 } }); var counters = mongoose.model('counters', CounterSchema); 

app.post（）：

 app.post('/save', function(req, res, next){ var data = req.body; var newuser = new user(); var dob = new Date(data['dob']); var doj = new Date(); for(var i in data){ if(i != dob){ newuser.i = data[i]; } } newuser.dob = dob; counters.findByIdAndUpdate({_id: 'userid'}, {$inc: { seq: 1} }, function(error, counter) { if(error) { return next(error); //https://stackoverflow.com/a/30164855/2168120 } newuser._id = counter.seq; next(); }); console.log(newuser.get('_id')); newuser.save(function (err) { if (err) { return handleError(err); } // saved! }); }); 

我无法将这个新logging保存到用户表中。

Answer 1

感谢这一点 。

1. 使用mongoose-auto-increment我可以创build一个自动递增的_id。

解：

 var mongoose = require('mongoose'); var autoIncrement = require('mongoose-auto-increment'); var connection = mongoose.createConnection("mongodb://localhost/dfp", function(err){ if(err){ console.log(err); }else{ console.log("connected to mongodb from app"); } }); autoIncrement.initialize(connection); /////// var userSchema = mongoose.Schema({email: String, fname: String, lname: String, pwd: String, gender: String, mobile: String, dob: { type: Date, default: Date.now }, ip : String, doj: { type: Date, default: Date.now } },{ collection : 'user' }); userSchema.plugin(autoIncrement.plugin, 'user'); var user = connection.model('user',userSchema); //////// 

2. 问题在于循环; 设置字段。

解：

 app.post('/save', function(req, res, next){ var data = req.body; var dob = new Date(data['dob']).toISOString(); var doj = new Date().toISOString(); var newuser = new user(); for(var i in data){ if(i != dob) { newuser.set(i, data[i]); } } newuser.dob = dob; newuser.doj = doj; newuser.save(function(error, users){ if (error) { next(); } // Return ID of element in response. console.log(users._id); }); });