Api Anrufe MEAN4 +

Question

So arbeite ich in einer gemeinen Stapel-Anwendung, aber ich bekomme einfach nicht meine API .. Das einzige, was funktioniert, ist das GET! Mein Post und Put scheint nicht zu funktionieren, ich denke, ich habe meine Syntax falsch, aber ich finde einfach nicht die richtige im Internet.

//GET 
router.get('/employees', (req, res) => { 
    connection((db) => { 
     db.collection('employees')   
      .find() 
      .toArray() 
      .then((employees) => { 
       response.data = employees; 
       res.json(response); 
      }) 
      .catch((err) => { 
       sendError(err, res); 
      }); 
    }); 
}); 

// POST 

router.post('/employees', (req, res) => { 

    const employees = { name: req.body.name, age: req.body.age , wage: req.body.wage , place: req.body.place }; 
    db.collection('employees').insert(employees, (err, result) => { 
     if (err) { 
     res.send({ 'error': 'An error has occurred' }); 
     } else { 
     res.send(result.ops[0]); 
     } 
    }); 

    }); 

//PUT 

    router.put('/employees/:id', (req, res) => { 
    const id = req.params.id; 
    const details = { '_id': new ObjectID(id) }; 
    const employee = { name: req.body.name, age: req.body.age , wage: req.body.wage , place: req.body.place }; 
    db.collection('employees').update(details, employee, (err, result) => { 
     if (err) { 
      res.send({'error':'An error has occurred'}); 
     } else { 
      res.send(employee); 
     } 
    }); 
    }); 

Answer 1

Ihre PUT und POST-Methoden nicht haben Verbindungen zur Datenbank hergestellt, so db.collection in beiden

undefiniert ist

router.post('/employees', (req, res) => { 

      const employees = { name: req.body.name, age: req.body.age , wage: req.body.wage , place: req.body.place }; 
    connection((db) => { 
      db.collection('employees').insert(employees, (err, result) => { 
       if (err) { 
       res.send({ 'error': 'An error has occurred' }); 
       } else { 
       res.send(result.ops[0]); 
       } 
      }); 
     }); 
      }); 

     //PUT 

      router.put('/employees/:id', (req, res) => { 
      const id = req.params.id; 
      const details = { '_id': new ObjectID(id) }; 
      const employee = { name: req.body.name, age: req.body.age , wage: req.body.wage , place: req.body.place }; 
      connection((db) => { 
      db.collection('employees').update(details, employee, (err, result) => { 
       if (err) { 
        res.send({'error':'An error has occurred'}); 
       } else { 
        res.send(employee); 
       } 
      }); 
    }); 
      });