javascript - Mongoose 在一个文档保存到数据库后产生冲突

Question

我这辈子都弄不明白我做错了什么简单的事情。我已将用户模式简化为一个属性，名称。当我将第一个发布到数据库时，一切都很好并且已保存。当我尝试用不同的名称保存另一个文件时，我遇到了冲突。它一定是非常简单的东西我错过了，但我需要一双额外的眼睛来检查它。

这是我的架构 (user.js)

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var userSchema = new Schema({
  name: {
    type: String
  }
});

var User = mongoose.model('User', userSchema);

module.exports = userSchema;

这是我的发帖请求 (index.js)

var express = require('express');
var bodyParser = require('body-parser');
var mongoose = require('mongoose');

var app = express();

// db connection and models
var conn = require('./db');
var User = conn.model('User');

// middleware
app.use(bodyParser.urlencoded({ extended: false })); // parse application/x-www-form-urlencoded
app.use(bodyParser.json()); // parse application/json

//POST - 创建一个用户

app.post('/api/user', function (req, res) {
  console.log(req.body);
  User.create(req.body, function (err, user) {
    if (err) {
      if (err.code === 11000) {
        return res.sendStatus(409); // conflict
      } else {
        return res.sendStatus(500); // server error
      }
    }
    res.sendStatus(200); // ok - user created
  });  
});

app.listen(3000);
console.log('Listening...');

Answer 1

模型.js

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
mongoose.connect('mongodb://localhost/webservice', function(err){
if(err){
  throw err; 
}else{
  console.log('Connect');
}
});
var UserSchema = mongoose.Schema({
name: String,
email: String,
city: String,
age: String
});
var User = mongoose.model('users', UserSchema);
module.exports = User;

索引.js

var app = require('express')();
var User = require('./model');

app.post('/User',function(req, res){
    var Newuser = req.body.user;

    User.create(Newuser, function(err, user){
        res
        .status(201)
        .json({
            user : user
        });

    })
})

服务器.js

var express = require('express');
var bodyParser = require ('body-parser');
/**
*   Variables
*/
var  server= module.exports = express();

/**
*   Middleware
*/
server.use(bodyParser.json('aplication/json'))

/** 
*   Routes
*/

 var users = require('./lib/users');
 server.use(users);


 if(!module.parent){
  server.listen(4000, function(){
  console.log("listen 4000 en http://localhost:4000")
  });

  } else {
   module.exports = server;
  }

结构

/Project
 /lib
    /users
          -index.js
          -model.js
 server.jse