How to update particular value of child in Firebase DB

Question

I am following this document. Following is my code for update:

func updateDealResultToServer(key:String,dealResult : String)
{

    let post = [\"dealResul\"         


        

Answer 1

I suggest using setValue for single child updates (keep in mind that I am using Swift 3, slight syntax changes may apply but you should be fine):

rootRef.child("komal_kyz").child(key).setValue(["dealResul":dealResult])