" An open source course that I am taking has the following prompt for fullstack development: 3.17: Phonebook database, step5 If the user tries to create a new phonebook entry for a person whose name is already in the phonebook, the frontend will try to update the phone number of the existing entry by making an HTTP PUT request to the entry's unique URL. Modify the backend to support this request. Verify that the frontend works after making your changes."*

It appears that this would call for an express app.put request called inside on an app.post request. Is there something that I'm missing here? How you handle this kind of logic with mongoDB/mongoose/expresss? My current post code is pasted below.

Thanks

app.post('/api/persons',(req,res) => {
  const body = req.body
  const containsNameNumber = body.name && body.number

  if(!containsNameNumber){
    return res.status(400).json({
      error:"must specify a name and a number"
    })
  }

  const phone = new Person({
    name: body.name,
    number:body.number
  })

  phone.save().then(savedPerson => {
      res.json(savedPerson)
    })
})