Qfyilyi

i'm have an order table in firebase like this

and in my iOS app, i want to show the orders for the user which is active and want to sort them by (CreateDate) to show the newest first

i'm using this code , it's only show the user orders without sorting by date

 if   (Auth.auth().currentUser != nil) {

        let user = Auth.auth().currentUser

        if let user = user {

            uid = user.uid



            print("uid = (uid)")





            // get order details

            let ordersRef = rootRef.child("orders")

            ordersRef.queryOrdered(byChild: "clientuid_status").queryEqual(toValue: "(uid)_0").observe(.childAdded, with: { (snapshot) -> Void in



                let snabshotvalue = snapshot.value as? [String : AnyObject]

                let dateorder = snabshotvalue!["orderDate"]

                let tecname = snabshotvalue!["tecname"]

                let theproblem = snabshotvalue!["theproblem"]

                let homeadress = snabshotvalue!["homeadress"]

                let clintlat = snabshotvalue!["clintlat"]

                let clintlong = snabshotvalue!["clintlong"]

                let clintuid = snabshotvalue!["clintuid"]

                let tecuid =  snabshotvalue!["tecuid"]

                let tecToken  = snabshotvalue!["tecToken"]

                let status = snabshotvalue!["status"]

                let servicetable = snabshotvalue!["servicetable"]



                let snashotkey = snapshot.key as String

                print("firstname: (tecname) ")



                self.dateArray.append(dateorder as? String)

                self.tecnameArray.append(tecname as? String)

                self.problemArray.append(theproblem as? String)

                self.homeadressArray.append(homeadress as? String)

                self.clintlatArray.append(clintlat as? String)

                self.clintlongArray.append(clintlong as? String)

                self.tecuidArray.append(tecuid as? String)

                self.tecTokenArray.append(tecToken as? String)

                self.orderuidArray.append(snashotkey )

                self.clintidArray.append(clintuid as? String)

                self.statusArray.append(status as? String)

                self.servicetableArray.append(servicetable as? String)



                self.getTechRatin(teckUid: tecuid as! String)



                self.tableView.reloadData()

            })





            }

i'm sent a ticket to firebase support, they told me to use this code :

    let orderOrdersByCreatedDate= (ref.child("orders").child(getUid())).queryOrdered(byChild: "createDate").queryLimited(toLast: 1)

when i try to use your code, i get this error :
Use of unresolved identifier 'getUid'

i don't know how use getUid()

That last snippet of code is wrong. To sort the orders by creadeDate you need:

ordersRef.queryOrdered(byChild: "creadeDate").observe(.childAdded, ...

But Firebase Database queries can only order/filter on a single property, so that means that you can no longer filter on clientuid_status as you do now.

In many cases it is possible to combine the values you want to filter on into a single (synthetic) property. You already seem to have done this with clientuid_status, and to allow both filtering on that and ordering on date, you'll expand it to clientuid_status_creadeDate and order/filter on that.

For an example of this and other approaches, see my answer here: http://stackoverflow.com/questions/26700924/query-based-on-multiple-where-clauses-in-firebase