Delete data from collection in FireStore and add to another collection at the same time

[brecht1970]

Hi,

I’m trying to make an app for my school. The purpose of the app is a login and logout registration for teachers. When teachers start teaching, there name and startTime is recorded. When they finish their lesson, name and endTime is recorded.

So I have 3 collections in Firestore:

1. names of teachers
2. teachers who are at work
3. a list that registers arrivals and departures.

I can append the teachers from collection 1 to collection 2 (with startTime) but in collection 2 on FireStore I want to delete the data from a row (in a ForEach) but at the same time I want to add that data (name + startTime & endTime) to collection 3 on FireStore. I can delete the data with
.onDelete but can’t append it at the same time to the other collection. Is there a solution for this?

Thanks in advance for helping me out
Brecht

I use this function and code to add the Teacher to collection 2:

 func addData(name: String, startTime: String) {
        do {
            _ = databaseReference.addDocument(data: ["name": name, "startTime": startTime])
        }
    }

collection 2: self.workingTeacherViewModel.addData(name: teacher.name ?? "", startTime: startTime)

I use this function to delete the data from collection 2:

func deleteData(at indexSet: IndexSet) {
        indexSet.forEach { index in
            let workingTeacher = workingTeachers[index]
            databaseReference.document(workingTeacher.id ?? "").delete { error in
                if let error = error {
                    print("\(error.localizedDescription)")
                } else {
                    print("Working teacher with ID \(workingTeacher.id ?? "") deleted")
                }
            }
        }
    }

From collection 2: .onDelete(perform: self.workingTeacherViewModel.deleteData(at:))

Here I want to simultaniously add the data from collection 2 to collection 3 (but with an extra endDate).

[brecht1970]

Found a solution. I needed to capture the data from collection 2 and I did it that way:

func removeAddTeacher(at indexSet: IndexSet) {
        let databaseReference = Firestore.firestore().collection("WorkingTeacherModel")
        let workingTeachers = workingTeacherViewModel.workingTeachers
        var teacher: String?
        var startTime: String?
        var startDate: String?
        indexSet.forEach { index in
            let workingTeacher = workingTeachers[index]
            teacher = workingTeacher.name
            startTime = workingTeacher.startTime
            startDate = workingTeacher.startDate
            databaseReference.document(workingTeacher.id ?? "").delete { error in
                if let error = error {
                    print("\(error.localizedDescription)")
                } else {
                    print("Working teacher with ID \(workingTeacher.id ?? "") deleted")
                }
            }
        }
        savedTeacherViewModel.addData(name: teacher ?? "" , startTime: startTime ?? "", startDate: startDate ?? "", endTime: endTime, endDate: endDate)
    }