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null safety

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This commit is contained in:
Phaung Phaung
2021-09-10 16:48:20 +06:30
parent 52fe4b4568
commit 0f84fec2f7
12 changed files with 103 additions and 106 deletions
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12
lib/pages/faq/model/faq_model.dart
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@@ -12,22 +12,22 @@ class FAQModel extends BaseModel {
List<FAQ> faqs = [];
FAQ getFAQ(String id) {
return faqs.firstWhere((e) => e.id == id, orElse: () => null);
return faqs.firstWhere((e) => e.id == id, orElse: () => FAQ());
}
StreamSubscription<QuerySnapshot> listener;
StreamSubscription<QuerySnapshot>? listener;
FAQModel() {
if (listener != null) listener.cancel();
if (listener != null) listener!.cancel();
try {
listener = Firestore.instance
listener = FirebaseFirestore.instance
.collection("/faqs")
.orderBy("sn", descending: false)
.snapshots()
.listen((snaps) {
faqs.clear();
snaps.documents.forEach((d) {
faqs.add(FAQ.fromMap(d.data, d.documentID));
snaps.docs.forEach((d) {
faqs.add(FAQ.fromMap(d.data as Map<String,dynamic>, d.id));
});
notifyListeners();
});