How to iterate through each key that contains the current rider id? - ios

Question

I am trying to retrieve data from firebase to place in textviews but the code I have is only giving me one instance of all the keys in "history".
I want to get the data, if the "rider" is equal to the current rider id.
I have tried different solutions here and on internet but nothing seemed to do what I needed it to do.
Firebase database:
The code I have :
let rider = FIRAuth.auth()?.currentUser?.displayName
// getting a reference to the node history
historyRef = ref.child("history")
// retrieve history key from firebase ....
let query = historyRef.queryOrdered(byChild: "rider").queryEqual(toValue: uid)
query.observe(.childAdded) { (snapshot) in
// history auto generated key ............
_ = snapshot.value as? String
let key = snapshot.key
// get values from history and place in outlet
self.historyRef.child(key).observeSingleEvent(of: .value, with: { (snapshot) in
if snapshot.exists() {
var dict = snapshot.value as! [String: AnyObject]
self.price = ((dict["ride_price"] as AnyObject) as! Double)
self.txtPrice1.text = "\(self.price!)" // to make double work in textview
self.txtPrice1.text = "\( Double(round(100 * self.price!)/100) )" // format .xx
self.txtPrice2.text = "\( Double(round(100 * self.price!)/100) )"
self.txtPrice3.text = "\( Double(round(100 * self.price!)/100) )"
self.distance = ((dict["distance"] as AnyObject) as! Double)
self.txtDistance.text = "\(self.distance!)"
self.txtDistance.text = "\( Double(round(100 * self.distance!)/100) )"
self.location = (dict["location"] as! String)
self.txtLocation.text = self.location
self.destination = (dict["destination"] as! String)
self.txtDestination.text = self.destination
self.timestamp = (dict["timestamp"] as! String)
self.txtTimestamp.text = self.timestamp
}
})
}

Answer 1

With the assistance of #Ratul Sharker, my issue is resolved. Here is what we had to do -- pass the key from History to HistoryDetails.
TripHistory
In my previous screen that contains the tableview that leads to the page in question
private var selectedIndexPath: IndexPath?
// didSelectRowAt indexPath
selectedIndexPath = indexPath
performSegue(withIdentifier: "segueShowTripDetail", sender: self)
// add method:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let key = completedTrips[selectedIndexPath!.row]
if segue.identifier == "segueShowTripDetail" {
let destination = segue.destination as! TripDetail
destination.key = key
}
}
In TripDetail
public var key: String! // container for the passed-in historyKey
// use passed-in 'key'
self.historyRef.child(self.key).observe(.value, with: { (snapshot) in