無法用Mongoose插入到MongoDB中

Question

我試圖在MongoDB中插入一個對象Mongoose，但沒有成功。 在 './models/user,js'我有：

var mongoDatabase = require('./db'); //I've connected to localhost here 
var database = mongoDatabase.getDb(); 
var mongoose = require('mongoose'); 
var Schema = mongoose.Schema; 
var userSchema = new Schema({ 
    user: String, 
    adress: String, 
}); 

userSchema.methods.testmethod = function(){ 
    console.log('test'); 
} 
userSchema.methods.insert = function (obj) { //this works but what is the point to use Mongoose If I do it that way 
    database.collection("users").insertOne(obj, function(err, res) { 
     if(err) throw err; 
     console.log("1 record inserted"); 
    }); 
} 
var User = mongoose.model('User', userSchema); 
module.exports = User; 

在' ./controllers/user.js'

var express = require('express'); 
var router = express.Router(); 
var User = require('../models/user'); 

router.post("/", function(request, response) { 
    var obj = new User({ 
     user: request.body.name, 
     adress: request.body.adress, 
    }); 

    obj.testmethod(); //works fine 
    obj.insert(obj); //throws an error 

    User.insertOne(obj, function(err, res) { //error: insertOne is not a function 
     if(err) throw err; 
     console.log("1 record inserted"); 
    }); 
}); 
module.exports = router; 

我已經嘗試了一些更多的方式來做到這一點，但沒有結果。有人能幫我嗎？

Answer 1

你不應該使用'./db'中創建的任何mongodb對象來完成這項工作，貓鼬會爲你處理它。儘量簡化到這一點：

var mongoose = require('mongoose'); 
var Schema = mongoose.Schema; 
var userSchema = new Schema({ 
    user: String, 
    adress: String, 
}); 
module.exports = mongoose.model('User', userSchema); 

然後在您的控制器代碼

var express = require('express'); 
var router = express.Router(); 
var User = require('../models/user'); 

router.post("/", function(request, response, next) { 
    var user = new User({ 
     user: request.body.name, 
     adress: request.body.adress, 
    }); 

    user.save(function(err, u) { 
     if (err) return next(err); 
     return res.json(u); 
    }); 
}); 
module.exports = router; 

某處在您的應用程序的啓動代碼（通常在app.js或類似位置），你要撥打mongoose.connect(<connection url>)，通常在建立路線之前。

注意，你也可以撥打insert()明確，但它的模型對象的靜態方法，像這樣：

User.insert({user: 'bob', address: 'somewhere, nh'}, cb)