类型错误员工不是构造函数node.js

Question

每当我尝试posthost方法到localhost：3001/employees时，我得到一个类型错误Employee不是构造函数。我已经在employee.js文件中定义了该模式，并将其与app.js链接起来，我有点不知道为什么它没有运行。任何帮助将不胜感激！！

Employee.js

<!-- language: lang-js --> 

    var mongoose = require("mongoose"); 

    var EmployeeSchema = new mongoose.Schema({ 
     _id: { 
     type: Number, 
     required: true 
     }, 
     first_name: { 
     type: String, 
     required: true 
     }, 
     last_name: { 
     type: String, 
     required: true 
     }, 
     title: { 
     type: String, 
     required: true 
     }, 
     start_date: { 
     type: String, 
     required: true 
     }, 
     birth_date: { 
     type: Number, 
     required: true 
     }, 
     wage: { 
     type: String, 
     required: true 
     } 
    }) 

    var Employee = mongoose.model("Employee", EmployeeSchema); 

    module.exports = Employee; 


<!-- end snippet --> 

employees.js

<!-- language: lang-js --> 

    var express = require("express"); 
    var mongodb = require("mongodb"); 
    var app = express(); 
    var router = express.Router(); 
    var mongoose = require("mongoose"); 
    var Employee = mongoose.model("Employee"); 

    router.post("/", (req,res) => { 
     var Employee = new Employee({ 
     _id: req.body._id, 
     first_name: req.body.first_name, 
     last_name: req.body.last_name, 
     title: req.body.title, 
     start_date: req.body.start_date, 
     birth_date: req.body.birth_date, 
     wage: req.body.wage 
     }) 

     Employee.save((err, result) => { 
     if(err) { 
      res.send(err); 
     } else { 
      res.send(result); 
     } 
     }) 
    }) 

    router.get("/", (req, res) => { 
     Employee.find(function (err, employees) { 
     if (err) { 
      res.send(err); 
     } else { 
      res.send(employees); 
     } 
     }) 
    }) 

    router.get("/:id", (req, res) => { 
     var employeeid = new mongodb.ObjectID(req.params["id"]); 
     Employee.find({"_id": employeeid},function (err, employees) { 
     if (err) { 
      res.send(err); 
     } else { 
      res.send(employees); 
     } 
     }) 
    }) 


    router.put("/", (req, res) => { 
     var employeeid = new mongodb.ObjectID(req.params["id"]); 
     Employee.find({"_id": employeeid},function (err, employees) { 
     if (err) { 
      res.status(500).send(err); 
     } else { 
      employee.title = req.body.title || employee.title; 
      employee.description = req.body.description || employee.description; 
      employee.price = req.body.price || employee.price; 
      employee.completed = req.body.completed || employee.completed; 

      Employee.save(function (err, employee) { 
       if (err) { 
        res.status(500).send(err) 
       } 
       res.send(employee); 
      }); 
     } 
    }); 
    }) 

    router.delete("/:id", (req, res) => { 
     var employeeid = new mongodb.ObjectID(req.params["id"]); 
     Employee.remove({_id: employeeid}).then(() => { 
     res.send("success"); 
     }) 
    }) 

    module.exports = router; 


<!-- end snippet --> 

app.js

<!-- language: lang-js --> 

    var express = require("express"); 
    var bodyParser = require("body-parser"); 
    var lessMiddleware = require('less-middleware'); 
    var mongoose = require('mongoose'); 
    var port = 3001; 
    var app = express(); 
    var router = express.Router(); 
    var path = __dirname + '/views/'; 
    require("./Employee"); 
    require("./user"); 
    var employees = require("./employees.js"); 
    var users = require("./users.js"); 

    mongoose.connect("mongodb://kenth56:123@ds034807.mlab.com:34807/database_baby", { 
     useMongoClient: true 
    }).then(() => { 
     console.log("db connected"); 
    }, ((err) => { 
     console.log(err); 
    })) 

    app.use(bodyParser.json()); 
    app.set("view engine", "ejs"); 
    app.use(lessMiddleware(path)); 
    app.use(express.static(path)); 
    app.use("/",router); 

    router.get("/", (req,res) => { 
     res.sendFile(path + "index.html"); 
    }) 

    app.use("/employees", employees); 

    app.use("/users", users); 

    app.listen(port,() => { 
     console.log("Live at Port " + port); 
    }) 

    router.use((req,res,next) => { 
     console.log("/" + req.method); 
     next(); 
    }) 

    app.use("*", (req,res) => { 
     res.sendFile(path + "404.html"); 
    }) 


<!-- end snippet --> 

Answer 1

的原因很可能是因为您声明VAR员工和覆盖其他您对员工的声明。尝试var e = new Employee（）来代替。