更改 url 路径中的 _id 编号后出现转换错误

Question

嘿，我有一个问题，当在数据库中找不到产品时如何显示信息？因为现在当我在 url 中更改 _id 编号时，我收到错误 Cast to ObjectId failed for value "5962088db4457a0aec3d9d4dh" at path "_id" for model "User"

api.js

router.get('/edit/:id', function(req, res) {
    var editUser = req.params.id;
    User.findOne({ username: req.decoded.username }, function(err, mainUser) {
        if(err) throw err
        if(!mainUser) {
            res.json({ success: false, message: 'User no found'});
        } else {
            if(mainUser.permission === 'admin' || mainUser.permission === 'moderator') {
                User.findOne({ _id: editUser }, function(err,user) {
                    if(err) throw err
                    if(!user) { 
                        res.json({ success: false, message: 'User no found' });
                    } else {
                        res.json({ success: true, user: user });
                    }
                })
            } else {
                res.json({ success: false, message: 'You are not an admin' });
            }
        }
    });
});

routes.js

.when('/edit/:id', {
    templateUrl: 'app/views/pages/management/edit.html',
    controller: 'editCtrl',
    controllerAs: 'edit',
    authenticated: 'true',
    permission: ['admin', 'moderator']
})
.otherwise({redirectTo : '/'})

Answer 1

您可以在查询数据库之前对 id 进行验证检查

var objectId = require('mongodb').ObjectID;

    if(objectid.isValid(editUser)){
    //your all code here
    }
    else
    {
     res.json({ success: false, message: 'invalid id' });
    }