未注册架构以显示模型错误

Question

在我的控制器中，

const blogModel = mongoose.model('Blog'),  

它开始显示错误模式尚未注册

我的模型/blog.js的代码

const mongoose = require('mongoose');

const Schema = mongoose.Schema;

let blogSchema = new mongoose.Schema({
    blogId: {
        type: String,
        unique: true
    }
 });

module.exports =  mongoose.model('Blog', blogSchema);

我的controller/blogs.js的代码这里我创建了一个方法getAllblogs来获取所有的博客

    const express = require('express')
    const mongoose = require('mongoose')
    const blogModel = mongoose.model('Blog')

    let getAllBlogs = (req,res) =>{
    blogModel.find()
    .select('-_v-_id')
    .lean()
    .exec((err,result) =>{
        if(err){
            console.log("error")
            res.send(err)
        }
        else if(result == undefined || result == null || result == '')
        {
            console.log("no blog found")
            res.send("no blog find")
        }
        else{
            console.log("blog found")
            res.send(result)
        }
    })
}

module.exports = {
    getAllBlogs:getAllBlogs
}

null

C:UsersDellBasicNode&>节点index.js

null

我的index.js的代码

const mongoose = require('mongoose') 
const express = require('express') 
const appConfig = require('./config/appConFig') 
const fs = require('fs') 
const bodyParser = require('body-parser')
 const cookieParser = require('cookie-parser') 
const app = express() app.use(bodyParser.json()) 
app.use(bodyParser.urlencoded({extended:false})) app.use(cookieParser())

let routesPath = './routes'; 
fs.readdirSync(routesPath).forEach(function(file)  {
if(-file.indexOf('.js')){
    console.log("finmding the path");
    console.log(routesPath+'/'+file);
    let route = require(routesPath+'/'+file);
    route.setRouter(app);
} });

let modelsPath = './models'; 
fs.readdirSync(modelsPath).forEach(function(file)  {
if(-file.indexOf('.js')){

    let route = require(modelsPath+'/'+file);
} });

app.get('/', (req,res) => { 
res.send('hello world i am here');

let db = mongoose.connect(appConfig.db.uri,{useMongoClient:true});
}) 
mongoose.connection.on('error' , function(err) {
console.log("database connection error")
console.log(err) });

mongoose.connection.on('open' , function(err) {
if(err)
{
console.log("database connection error")
console.log(err)
}
else{
    console.log("connection success")
} }); app.listen(appConfig.port, () => console.log("listening onn "))

Answer 1

您已经正确地创建并导出了猫鼬模式。。。。。但是您没有正确地导入它！试试这个。。。const blog=require(./models/blog.js)。您错过了'require'关键字。。。。否则一切正常。祝你今天愉快。

Answer 2

我已经检查了您的代码，发现了一些问题，因为您已经注册了模型，那么您将需要在 中要求它

const blogModel = require('../models/Blog')

在 中

// importing mongoose module
const mongoose = require('mongoose')
const Schema = mongoose.Schema;

let blogSchema = new Schema(
    {
        blogId: {
            type: String,
            unique: true
        },
        title: {
            type: String,
            default: ''
        },
        description: {
            type: String,
            default: ''
        },
        bodyHtml: {
            type: String,
            default: ''
        },
        views: {
            type: Number,
            default: 0
        },
        isPublished: {
            type: Boolean,
            default: false
        },
        category: {
            type: String,
            default: ''
        },
        author: {
            type: String,
            default: ''
        },
        tags: [],

        created: {
            type: Date,
            default: Date.now
        }, 

        lastModified: {
            type: Date,
            default: Date.now
        }
    }
);

module.exports =  mongoose.model('Blog', blogSchema);

null

const mongoose = require('mongoose')
const express = require('express')
const appConfig = require('./config/appConFig')
const fs = require('fs')
const bodyParser = require('body-parser')
const cookieParser = require('cookie-parser')
//const mod = require('./models/Blog')
let db = mongoose.connect(appConfig.db.uri,{useMongoClient:true});
const app = express()

Answer 3

尝试从

至

null

在index.js文件中，将mongoose.connect移动到文件顶部的routes之前。

更新:

将index.js更改为

const mongoose = require("mongoose");
const express = require("express");
const appConfig = require("./config/appConFig");
const fs = require("fs");
const bodyParser = require("body-parser");
const cookieParser = require("cookie-parser");
//const mod = require('./models/Blog')
const app = express();

mongoose.connect(appConfig.db.uri,{ useNewUrlParser: true });

mongoose.connection.on("error", function(err) {
  console.log("database connection error");
  console.log(err);
});

mongoose.connection.on("open", function(err) {
  if (err) {
    console.log("database connection error");
    console.log(err);
  } else {
    console.log("connection success");
  }
});

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());

let routesPath = "./routes";
fs.readdirSync(routesPath).forEach(function(file) {
  if (-file.indexOf(".js")) {
    console.log("finmding the path");
    console.log(routesPath + "/" + file);
    let route = require(routesPath + "/" + file);
    route.setRouter(app);
  }
});

let modelsPath = "./models";
fs.readdirSync(modelsPath).forEach(function(file) {
  if (-file.indexOf(".js")) {
    let route = require(modelsPath + "/" + file);
  }
});

app.get("/", (req, res) => {
  res.send("hello world i am here");
});

app.listen(appConfig.port, () => console.log("listening onn "));

然后还将blogs.js控制器更改为

const express = require('express')
const mongoose = require('mongoose')
 const blogModel = require('../models/Blog.js')

let getAllBlogs = (req,res) =>{
    blogModel.find()
    .select('-_v-_id')
    .lean()
    .exec((err,result) =>{
        if(err){
            console.log("error")
            res.send(err)
        }
        else if(result == undefined || result == null || result == '')
        {
            console.log("no blog found")
            res.send("no blog find")
        }
        else{
            console.log("blog found")
            res.send(result)
        }
    })
}


    module.exports = {
        getAllBlogs:getAllBlogs
    }