[英]Receiving a Cannot POST error when attempting to post data in a rest client
我在嘗試將新條目發布到我創建的名為 Doctors 的數據庫中時收到此錯誤。
我的 server.js 看起來像這樣：
const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const app = express();
const router = express.Router();
const MongoClient = require('mongodb').MongoClient;
const client = new MongoClient(uri, { useNewUrlParser: true });
const morgan = require('morgan');
var Doctor = require('./www/js/user.js');
app.use(bodyParser.json());
app.use(express.static('www'));
app.use(morgan('dev'));
app.use(bodyParser.urlencoded({ 'extended': 'true' }));
app.use(bodyParser.json());
const mongoURL = 'mongodb://localhost:27017/app';
mongoose.connect(mongoURL, function (err) {
if (err) {
console.log('Not connected to the database:' + err);
} else {
console.log('Successfully connected to MongoDB');
}
});
app.post('/doctors', function (req, res) {
var doctor = new Doctor();
doctor.doctorID = req.body.doctorID;
doctor.password = req.body.password;
doctor.save();
res.send('doctor created');
});
// Configure port
const port = process.env.PORT || 8080;
// Listen to port
app.listen(port);
console.log(`Server is running on port: ${port}`);
app.get('*', function (req, res) {
res.sendfile('./www/index.html');
});
我的 user.js，即我的架構，如下所示：
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var bcrypt = require('bcrypt-nodejs');
var DoctorSchema = new Schema({
doctorID: {type: Number, required: true, unique: true},
password: {type: String, required: true}
});
//encrypt password
DoctorSchema.pre('save', function(next){
var doctor = this;
bcrypt.hash(doctor.password, null, null, function(err, hash){
if (err) return next(err);
doctor.password = hash;
next();
});
})
module.exports = mongoose.model('Doctor', DoctorSchema);
嘗試發布時，我收到此錯誤。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Error</title>
</head>
<body>
<pre>Cannot POST /doctors</pre>
</body>
</html>
我不明白為什么我會收到這個特定的錯誤。 我可以毫無問題地從 /doctors 獲取數據，只是無法發布。
請將您的 server.js 更改為：
const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const app = express();
const MongoClient = require('mongodb').MongoClient;
const client = new MongoClient(uri, { useNewUrlParser: true });
const morgan = require('morgan');
var Doctor = require('./www/js/user.js');
app.use(bodyParser.json());
app.use(express.static('www'));
app.use(morgan('dev'));
app.use(bodyParser.urlencoded({ 'extended': 'true' }));
app.use(bodyParser.json());
const mongoURL = 'mongodb://localhost:27017/app';
mongoose.connect(mongoURL, function (err) {
if (err) {
console.log('Not connected to the database:' + err);
} else {
console.log('Successfully connected to MongoDB');
}
});
app.post('/doctors', function (req, res) {
var doctor = new Doctor();
doctor.doctorID = req.body.doctorID;
doctor.password = req.body.password;
doctor.save();
res.send('doctor created');
});
// Configure port
const port = process.env.PORT || 8080;
app.get('*', function (req, res) {
res.sendfile('./www/index.html');
});
app.listen(port, function() {
console.log(
`Server listening on port ${port}!`
);
});
編輯- 只是更正 .listen 中的問題
不能 POST /doctors in express 意味着特定的路由不存在。
你能展示更多的代碼，你在哪個端口發布？
您是否在請求中設置了正確的內容類型？
Content-Type: application/json
否則， req.body.doctorID將返回undefined 。
我剛剛成功測試了這個..看來問題出在你的Mongo代碼上..
試試這個，如果它有效，你就知道問題出在Mongo部分。
這就是我發送請求的方式..使用郵遞員
這顯示了我如何能夠接收請求：
const express = require('express');
const bodyParser = require('body-parser');
//const mongoose = require('mongoose');
const app = express();
const router = express.Router();
//const MongoClient = require('mongodb').MongoClient;
//const client = new MongoClient(uri, { useNewUrlParser: true });
//const morgan = require('morgan');
//var Doctor = require('./www/js/user.js');
app.use(bodyParser.json());
app.use(express.static('www'));
//app.use(morgan('dev'));
app.use(bodyParser.urlencoded({ 'extended': 'true' }));
app.use(bodyParser.json());
//const mongoURL = 'mongodb://localhost:27017/app';
/*
mongoose.connect(mongoURL, function (err) {
if (err) {
console.log('Not connected to the database:' + err);
} else {
console.log('Successfully connected to MongoDB');
}
});
*/
app.post('/doctors', function (req, res) {
console.log(req.body);
res.status(200).send();
/*
var doctor = new Doctor();
doctor.doctorID = req.body.doctorID;
doctor.password = req.body.password;
doctor.save();
res.send('doctor created');
*/
});
// Configure port
const port = process.env.PORT || 8080;
// Listen to port
app.listen(port);
console.log(`Server is running on port: ${port}`);
app.get('*', function (req, res) {
res.sendfile('./www/index.html');
});
為了擴展這個答案..我通常按以下方式配置Mongoose ..
文件夾結構：
root
|- database
|- index.js
|- models
|- someModel.js
在/root/database/index.js ：
'use strict'
const mongoose = require('mongoose');
const mongoBaseUrl = `mongodb://server:27017/collection`;
const mongoDB = mongoose.createConnection(mongoBaseUrl, { useNewUrlParser: true, promiseLibrary: global.Promise });
mongoose.set('useCreateIndex', true) // needed to suppress errors
module.exports = mongoDB;
然后在/root/models/someModel.js ：
'use strict'
const mongoose = require('mongoose');
const mongoConnection = require('../database');
const modelName = "SomeModel";
const collection = "SomeCollection";
const databaseName = "SomeDatabase";
const myDatabase = mongoConnection.useDb(databaseName);
const SomeSchema = new mongoose.Schema({
// Schema data here
})
module.exports = myDatabase.model(modelName, SomeSchema, collection) // (database, schema, collection)
然后在您的路線中使用它：
const Doctor = require('./models/someModel.js');
app.post('/route/', (req, res, next) => {
var doctor = new Doctor();
doctor.doctorID = req.body.doctorID;
doctor.password = req.body.password;
doctor.save();
res.send('doctor created');
});
那種效果的東西。 希望這可以幫助。
事實證明，兩者都不是問題，我們有一個重復的 server.js，它引用了不正確的。 無論如何感謝您的幫助！ 希望這個線程可以幫助其他人。
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