javascript CRUD操作

Posted 2021-05-03

//========= POST ========//


// Process Form
app.post('/ideas', (req, res) => {
    let errors = [];

    // Add Server-Side Validation
    if (!req.body.title) {
        errors.push({
            text: 'Please add a title'
        });
    }
    if (!req.body.details) {
        errors.push({
            text: 'Please add some details'
        });
    }

    // Check if there are errors
    if (errors.length > 0) {
        // Render back html page to send error messages
        res.render('ideas/add', {
            errors,
            title: req.body.title,
            details: req.body.details
        })
    } else {
        const newUser = {
            title: req.body.title,
            details: req.body.details
        }

        // Don't just fucking insert the request body in here.
        // It's not a good idea
        new Idea(newUser)
            .save()
            .then(idea => {
                 res.redirect('/ideas');
            })
    }


});


//===== END POST ====//

//========= GET ========//


// Edit Idea Form
app.get('/ideas/edit/:id', (req, res) => {
    Idea.findOne({ _id: req.params.id })
        .then(idea => {
            res.render('ideas/edit', {
                title: idea.title,
                details: idea.details
            })
    })

});

app.get('/ideas', (req, res) => {
    Idea.find({})
        .sort({ date: 'desc' })
        .then(ideas => {
            res.render('ideas/index', {
                ideas
            })
        })
})


//===== END GET ====//


//========= PUT ========//

// Note: method-override is needed in non-supported clients
// method-override lets you use HTTP verbs such as PUT or DELETE in places where the client doesn't support it.

app.put('/ideas/:id', (req, res) => {
    Idea.findOne({
        _id: req.params.id
    }).then(idea => {
        // new values
        idea.title = req.body.title;
        idea.details = req.body.details;

        idea.save().then(idea => {
             res.redirect('/ideas');
        })
    })
})

//===== END PUT ====//


//========= DELETE ========//


app.delete('/ideas/:id', (req, res) => {
    Idea.remove({ _id: req.params.id })
        .then(() => {
             res.redirect('/ideas');
        })
})


//===== END DELETE ====//