我是node和mongoDb的新手, 我有一个mongo数据库帐户,在其中创建了一个名为“ dbTestData”的集合
我正在尝试使用node express猫鼬和express创建CRUD操作, 而且我正在使用邮差来获取更新和删除值到mlab数据库。
我的Get呼叫工作正常,但是当我尝试在Json中发布值时,
我收到成功消息,但是当我检查数据库时,它将另存为
{
"_id": {
"$oid": "5c3ad1c19bc5932f800d26f7"
},
"__v": 0
}
我的app.js
const express = require('express');
const bodyParser = require("body-parser");
const mongoose=require('mongoose');
const app = express();
const dbTestData=require('./models/post')
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
mongoose.connect("mongodb://<userName>:<password>@ds221242.mlab.com:21242/kiitasklist").then(()=>{
console.log("hello");
}).catch(
()=>{
console.log("heee");
});
app.use((req, res, next) => {
res.setHeader("Access-Control-Allow-Origin", "*");
res.setHeader(
"Access-Control-Allow-Headers",
"Origin, X-Requested-With, Content-Type, Accept"
);
res.setHeader(
"Access-Control-Allow-Methods",
"GET, POST, PATCH, PUT,DELETE, OPTIONS"
);
next();
});
app.post("/api/posts", (req, res, next) => {
const post = new dbTestData({
id:req.body.id,
name:req.body.name
});
post.save().then(documents=>{
console.log(post);
res.status(201).json({
message: 'Post added successfully'
});
});
});
app.get("/api/posts",(req,res,next)=>{
dbTestData.find().then(documents=>{
res.status(200).json({
message:'Posts fetched successful',
posts:documents
});
});
});
app.put("/api/posts/:id",(req,res,next)=>{
const post = new dbTestData({
_id:req.body._id,
name:req.body.name
});
dbTestData.updateOne({_id:req.params.id},post).then(result=>{
res.status(200).json({message:"update successfully"});
});
});
app.delete("/api/posts/:id",(req,res,next)=>{
dbTestData.deleteOne({_id:req.params.id}).then(documents=>{
res.status(200).json({
message:'posts fetched successful',
posts:documents
});
});
});
module.exports = app;
我的Server.js
const http = require('http');
const app = require('./api/app');
const port = process.env.PORT || 3000;
const server = http.createServer(app);
server.listen(port);
我创建了猫鼬模式的post.js
const mongoose=require('mongoose');
var Schema = mongoose.Schema;
module.exports= mongoose.model("dbTestData", new Schema({}), "DbTestData");
获取和删除均有效, 但是发布和放置操作未正确进行,它在我的控制台中返回一条成功消息,但空值为
{
"_id": {
"$oid": "5c3ad1c19bc5932f800d26f7"
},
"__v": 0
}
在POST期间被保存,而在PUT期间没有任何反应。
答案 0 :(得分:0)
要解决此帖子问题
var Schema = mongoose.Schema;
PostSchema = new Schema({
id:Number,
name: String
});
// the compile the model using mongoos model function giving the schema u created
const Post = module.exports= mongoose.model("dbTestData", PostSchema, "DbTestData");
之后,在您的帖子要求中按以下步骤进行操作
//before posting you need to require the model first
const Post = require('./models/post'); // your post.js
app.Post("/api/posts", (req, res, next) => {
const post = new Post({
id:req.body.id,
name:req.body.name
});
post.save().then(documents=>{
console.log(post);
res.status(201).json({
message: 'Post added successfully'
});
});
});
确保正确创建/定义模式,以便使用它保存数据。 正确放置模式后,放置后的操作与您做的工作相同
,最后也尝试一下。确保您添加的拖曳线与我在您的情况下给出的完全相同,并且已将它们切换
// Body Parser Middleware
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());