Node.js 使用mongoose自定义连接

我不确定在哪里定义mongoose自定义连接。我目前在server.js文件中设置了它，但在查看文档时，它似乎是在模型文件本身中定义的，因为他们在创建到模型的连接后使用了connection对象

//从医生那里

var connection = mongoose.createConnection('mongodb://localhost:27017/test');
var Tank = connection.model('Tank', yourSchema);

我遇到的问题是，由于我在服务器文件中建立了连接，它不知道什么是

连接

//Server.js

var databaseUri = "mongodb://localhost/food";

if (process.env.MONGODB_URI) {
    mongoose.createConnection(process.env.MONGODB_URI);
} else {
    mongoose.createConnection(databaseUri)
}

var database = mongoose.connection;

database.on("error", function(err) {
  console.log("Mongoose Error: ", err);
});

database.once("open", function() {
  console.log("Mongoose connection successful.");
});

我的模型

var mongoose = require("mongoose");

var Schema = mongoose.Schema;

var UserSchema = new Schema({
  first_name: {
    type: String,
    trim: true,
    required: "First Name is Required"
  },
  last_name: {
    type: String,
    trim: true,
    required: "Last Name is Required"
  },
  email: {
    type: String,
    trim: true,
    required: "Email is Required"
  }
});

//I need to use the connection I made in server js here, but not sure how. I tried exporting it from server file but it is not working.
var User = mongoose.model("User", UserSchema);

module.exports = User;

---

在您的server.js中，您需要

用户

，该用户将：

//connecton to the location of the database you use
let databaseUri = "mongodb://localhost/food"; //you didn't include your port number. I try it on "mongodb://localhost:3000/food"
let user = require('User'); //NOTE: ensure you reference the location of the `User` file correctly

let port = process.env.PORT || 3000;
let ip = process.env.IP || '127.0.0.1';

console.log("server started at http//:" + ip + ":" + port);

这应该在您的模型中：

let mongoose = require("mongoose");

//variable that will hold my connection
let database = mongoose.connection;
let mongoose = require('mongoose');

let Schema = mongoose.Schema;


    // User Schema
    let UserSchema = new Schema({
  first_name: {
            type: String
        },var UserSchema = new Schema({
  first_name: {
    type: String,
    trim: true,
    required: "First Name is Required"
  },
  last_name: {
    type: String,
    trim: true,
    required: "Last Name is Required"
  },
  email: {
    type: String,
    trim: true,
    required: "Email is Required"
  }
});


//This line below exports the whole module to mongoose.model
module.exports.User = mongoose.model('User', UserSchema);

---

啊，我明白了，然后在那里建立连接。当你说连接时，你的意思是像

localhost:27017/test

一样吗？不，我的意思是做他们文档中的事情，而是把它放在我的服务器文件中。导入用户后，我想做一些类似于

User=connection.model（'User'，yourSchema）的事情但在服务器文件中，我认为这实际上不起作用，因为我的模型中有这个，并将其导出到那里，我认为在我的服务器中有这个并从那里导出它是没有意义的，除非这是正确的方法。我试图使用mongoose的createConnection（），而不是常规连接（）。另外，在模型中创建连接本身不是一个很好的地方吗？