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Firebase Firestore snapshot publisher that maps snapshot documents to an array of your model data type
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| import Foundation | |
| import Firebase | |
| import FirebaseFirestore | |
| import FirebaseFirestoreCombineSwift | |
| import Combine | |
| extension Query { | |
| func snapshotArrayPublisher<T: Decodable>( | |
| as type: T.Type, | |
| includeMetadataChanges: Bool = false | |
| ) -> AnyPublisher<[T], Error> { | |
| snapshotPublisher() | |
| .tryMap { querySnapshot throws -> [T] in | |
| let typeArray = try querySnapshot.documents.compactMap { queryDocumentSnapshot in | |
| return try queryDocumentSnapshot.data(as: T.self) | |
| } | |
| return typeArray | |
| } | |
| .eraseToAnyPublisher() | |
| } | |
| } | |
| // Usage in your code | |
| var yourModelPublisher: AnyPublisher<[YourModel], Error> { | |
| firestore.collection("yourCollectionName") | |
| .snapshotArrayPublisher(as: YourModel.self) | |
| .eraseToAnyPublisher() | |
| } |
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