我无法使用NodeJ在我的MySQL数据库上输入或删除任何内容

Question

我无法在我的数据库中放置和删除任何内容，我认为我的核心是正确的

这是一个运行MariaDB 10.1.37，Apache 2的项目。

代码：

const express = require('express');
const app = express();
const bodyParser = require('body-parser');
const port = 3000;
const mysql = require('mysql');

function execSQLQuery(sqlQry, res){
    const connection = mysql.createConnection({
    host: 'localhost',
    port: 3306,
    user: 'root',
    password: '',
    database: 'usdb'

});
    connection.query(sqlQry, function(error, results, fields){
        if(error)
            res.json(error);
        else
            res.json(results);
        connection.end();
        console.log('executou!')
    })
}
//cofigurando body parser para pegar os POSTS mais tarde
app.use(bodyParser.urlencoded({extended: true}));
app.use(bodyParser.json());

//definindo as rotas
const router = express.Router();
router.get('/',(req,res) => res.json({message: 'Funcionando!'}));
app.use('/',router);

router.get('/substances',(req, res) =>{
    execSQLQuery('SELECT * FROM organicssubstances', res);
});

router.get('/substance/:id?', (req, res) =>{
    let filter = '';
    if(req.params.id) filter = ' WHERE id=' + parseInt(req.params.id);
    execSQLQuery("SELECT * FROM organicssubstances"+filter, res);
});

router.get('/substance/:id', (req,res) =>{
    execSQLQuery("DELETE FROM organicssubstances WHERE id=" + parseInt(req.params.id), res);
});

router.get('/substances', (req,res) =>{
    const substance = req.body.substring(0,150);
    const formula = req.body.substring(0,150);
    execSQLQuery(`INSERT INTO organicssubstances(substance, formula) VALUES('${substance}','${formula}')`, res);
});

//inicia o servidor
app.listen(port)
console.log('API Funcionando!')

PUT和DELETE代码：

router.get('/substance/:id', (req,res) =>{
    execSQLQuery("DELETE FROM organicssubstances WHERE id=" + parseInt(req.params.id), res);
});

router.get('/substances', (req,res) =>{
    const substance = req.body.substring(0,150);
    const formula = req.body.substring(0,150);
    execSQLQuery(`INSERT INTO organicssubstances(substance, formula) VALUES('${substance}','${formula}')`, res);
});

我在网站上看到这个代码，只是适应了我的使用，但没有工作。

https://i.imgur.com/cDyyio4.png https://i.imgur.com/y5zruZG.png

Answer 1

从我所看到的，您应该将路由定义为put和delete。没有

router.get(‘/urlforget’, callbackfunction);


router.put(‘/urlforput’, callbackfunction);