ios - Writing data to firebase without overwriting it. Swift -


i got app working on firebase, have small problem of overwriting data.

the action:

 @ibaction func gem(_ sender: uibutton) {     self.ref.child("users").child(personnr.text!).setvalue(["fornavn": fornavn.text!])      self.ref.child("users").child(personnr.text!).setvalue(["efternavn": efternavn.text!])   }

the problem writes first command, erases , writes second one. im new programming, simply.

i have clarified text fields user write data uploaded database.

@iboutlet weak var fornavn: uitextfield!  @iboutlet weak var efternavn: uitextfield!  @iboutlet weak var personnr: uitextfield!  @iboutlet weak var korekort: uitextfield!

any clues on how avoid overwrite?

that pretty normal can make dictionary 

let data = ["fornavn": fornavn.text!,"efternavn": efternavn.text!]

and 

self.ref.child("users").child(personnr.text!).setvalue(data)

what stores both fornavn , efternavn data under personnr.text parent node


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