Problem retrieving data from Firestore Database - swift

Question

I am trying to retrieve data from a collection in my firestore database. But when print the retrieved data, it doesn't conform to the format I expected.
Here is my code to retrieve the data below :
let db = Firestore.firestore()
func loadEvents() -> [Event] {
var events = [Event]()
let decoder = JSONDecoder()
db.collection("Events").addSnapshotListener { QuerySnapshot, error in
guard let documents = QuerySnapshot?.documents else {
print("Error fetching documents: \(error!)")
return
}
for doc in documents {
let dict = doc.data()
if let data = try? JSONSerialization.data(withJSONObject: dict, options: []) {
let event = try? decoder.decode(Event.self, from: data)
events.append(event!)
print(events) // Prints stuff like [Envy.Event] ...
}
}
// let events = documents.map {$0.data()}
}
return events
}
On reaching the print(events) it prints stuff like [Envy.Event]
[Envy.Event, Envy.Event]
[Envy.Event, Envy.Event, Envy.Event]
[Envy.Event, Envy.Event, Envy.Event, Envy.Event] which is not suitable data format for manipulation. I don't even understand this format; Can someone help me out ?

Answer 1

you are printing it wrong . you are printing the whole model class you created you need to refer the object inside the class for eg.
print(events.name) // use the object name you have in your class
print(events.location) // use the object name you have in your class
To add the data into array
Example Code:
db.collection("Events").getDocuments() { (querySnapshot, err) in
if let err = err {
print("Error getting documents: \(err)")
} else {
for document in querySnapshot!.documents {
let list = Event(name: document.get("yourKeyName") as? String,location: document.get("yourAnotherKeyName") as? String)
events.append(list)
print(event.name)
print(event.location)
}
}
}
Hope this helps