Javascript TypeError:.find（…）不是nodejs mongoose函数

我正在nodejs中处理样本。我被打字错误打动了：汽车。查找。。。这不是一个函数 当我尝试访问时，在D:\Karthikeyan\rest server\routes\carsRouter.js:19:15。谢谢 App.js

routes/carsRouter.js

var express = require('express');
var bodyParser = require('body-parser'); /*Parses the data seerved from client*/
var mongoose = require('mongoose');
var Cars = require('../models/cars');
var carsRouter = express.Router(); /*with the help we have defined in global with router*/
carsRouter.use(bodyParser.json());

carsRouter.route('/')
.get(function(req,res,next){
    Cars.find({})(function (err,cars) {
        assert.equal(err,null);
        res.json(cars);
    });
})
.post(function(req,res,next){
    Cars.create(req.body,function(err,cars){
        if(err) throw err;
        console.log('cars inserted');
        var id = cars._id;
        res.writeHead(200,{'content-type':'text/plain'});
        res.end('the car you inserted is '+id);
    });
})
.delete(function(req,res,next){
    Cars.remove({},function(err,res){
        if(err) throw err;
        res.json(res);
    });
});

carsRouter.route('/:carId')
.get(function(req,res,next){
    Cars.findById(req.params.id,function(err,cars){
        if(err) throw err;
        res.json(cars);
    });
})
.put(function(req,res,next){
    Cars.findByIdAndUpdate(req.params.id,{
            $set:req.body
        },
        {
            new:true
        },function(err,cars){
        if(err) throw err;
        res.json(cars);
    });
})
.delete(function(req,res,next){
    Cars.remove(req.params.id,function(err,res){
        if(err) throw err;
        res.json(res);
    });
});

carsRouter.route('/:carId/comments')
.get(function(req,res,next){
    Cars.findById(req.params.id,function(err,cars){
        if(err) throw err;
        res.json(cars.comments);
    });
})
.post(function(req,res,next){
    Cars.findById(req.params.id,function(err,cars){
        if(err) throw err;
        cars.comments.push(req.body);
        cars.save(function (err,cars) {
            if(err) throw err;
            console.log('updated');
            res.json(cars);
        });
        res.json(cars.comments);
    });
})
.delete(function(req,res,next){
    Cars.findById(req.params.id,function(err,cars){
        if(err) throw err;
        for (var i = (cars.comments.length - 1); i >= 0; i--){
            cars.comments.id(cars.comments[i]._id).remove();
        }
        cars.save(function (err,cars) {
            if(err) throw err;
            console.log('updated');
            res.json(cars);
        });
    });
    Cars.remove(req.params.id,function(err,res){
        res.writeHead(200,{'content-type':'text/plain'});
        res.end('comments deleted');
    });
});
module.exports = carsRouter;

models/cars.js

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

var commentsSchema = new Schema({
    rating:{
        type:Number,
        min:1,
        max:5,
        required:true
    },
    comment:{
        type:String,
        required:true
    },
    price:{
        type:String,
        required:true
    }
},
{
    timestamps:true
});

var carsSchema = new Schema({
    name:{
        type: String,
        required:true,
        unique:true
    },
    description:{
        type:String,
        required:true
    },
    comments:[commentsSchema]

},
{timestamps:true});

var cars = mongoose.model('cars',carsSchema);

module.exports = cars;

您以错误的方式使用了find查询。回调必须在find函数中

您以错误的方式使用了find查询。回调必须在find函数中

---

您的查找查询是错误的

更新如下：

Cars.find({}, function (err,cars) {
    assert.equal(err,null);
    res.json(cars);
});

或

---

您的查找查询是错误的

更新如下：

Cars.find({}, function (err,cars) {
    assert.equal(err,null);
    res.json(cars);
});

或

---

什么是汽车？JSON？不，我试图引用模型-var Cars=require'../models/Cars'；什么是汽车？JSON？不，我试图引用模型-var Cars=require'../models/Cars'；

Cars.find({}, function (err,cars) {
    assert.equal(err,null);
    res.json(cars);
});

Cars.find({})
    .exec(function (err,cars) {
        assert.equal(err,null);
        res.json(cars);
    });