javascript - 这个方法/函数如何被调用两次？

Question

我只是通过代码直接向数据库发送一些数据，只是为了测试我的数据库连接。所以时机是使用 GET 方法而不是 POST。这是我的代码：

const express = require('express');
const router = express.Router();
const db = require('../config/database');
const Gig = require('../models/Gig');
const Sequelize = require('sequelize');
const favicon = require('express-favicon');

next();
//Get the gig list
router.get('/', (req, res) => 
    Gig.findAll()
      .then(gigs => {
          console.log(gigs);
          console.log('Looks like no error!!!!');
          res.sendStatus(200);
    })
    .catch(err => console.log('ERROR in routes/gigs.js: >> '+err)));

//Add data to database
router.get('/add', (req, res, next) => {
    const data = {
        title: 'Full Stack Developer',
        technologies: 'Node.js, React.js, MongoDB, PostgreSQL, Android, iOS, Wed Development',
        budget: '$5000',
        description: 'Since established in 1995, Bluebird Inc. has developed constantly together with our partners as the leading provider of the mobile computer.'+
        'We have always released innovative products timely to market that meet the expanding needs of our customers,'+
        'which is the essential factor to success in a mobile computing business',
        contact_email: '[e-mail]'
    }

    let { title, technologies, budget, description, contact_email } = data;

    //To insert data
    Gig.create({
        title,
        technologies,
        budget,
        description,
        contact_email
    })
    .then(gig => {
        console.log(gig);
        res.redirect('/gigs');
        res.send();
        return next();
    }) 
    .catch(err => console.log('ERROR while inserting in routes/gigs.js: >> '+err));
});

module.exports = router;

问题是上面的函数被执行了两次。一旦将数据发送到数据库，我不知道如何停止它或结束该功能。

更多代码：

const express = require('express');
const exphbs = require('express-handlebars');
const bodyParser = require('body-parser');
const path = require('path');
const db = require('./config/database');

db.authenticate()
  .then(() => console.log('Database Connected...'))
  .catch(err => console.log('ERROR:>>  '+err));

const app = express();

app.get('/', (req, res) => res.send('INDEX'));

//Get routes
app.use('/gigs', require('./routes/gigs'));

const PORT = process.env.PORT || 5000;
app.listen(PORT, console.log(`Server started on port ${PORT}`));

标签： javascriptnode.jspostgresqlexpress