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sla-000/firestore-model-with-reference.dart

Created June 3, 2020 10:35
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firestore-model-with-reference.dart
Модель Project:
...
const String kProjectsCollectionName = 'projects';
class ProjectModel {
/// Create new project
ProjectModel({
this.user,
this.name,
});
/// No project to show
ProjectModel.empty();
/// Fill project data from document snapshot
ProjectModel.fromMap(Map<String, dynamic> map, this.reference) {
user = map[kField_user];
name = map[kField_name];
}
static const String kField_user = 'user';
static const String kField_name = 'name';
String user;
String name;
DocumentReference reference;
bool isEmpty() => user == null;
Map<String, dynamic> toMap() {
final Map<String, dynamic> map = <String, dynamic>{};
map[kField_user] = user;
map[kField_name] = name;
return map;
}
@override
String toString() {
return 'ProjectModel{user: $user, name: $name}';
}
}
...
Получить список проектов в подписке:
...
_projectsSubscription = Firestore.instance
.collection(kProjectsCollectionName)
.where(ProjectModel.kField_user, isEqualTo: email)
.snapshots()
.listen((QuerySnapshot querySnapshot) {
if (querySnapshot?.documents == null) {
_log.warning(() => '_subscribeOnProjects: snapshot is null or empty');
clear();
return;
}
final List<ProjectModel> projectModels = querySnapshot.documents
.map((DocumentSnapshot documentSnapshot) => ProjectModel.fromMap(
documentSnapshot.data, documentSnapshot.reference))
.toList(growable: false);
...
Обновить данные используя reference, так же можно и удалить:
...
await projectModel.reference.updateData(<String, dynamic>{
ProjectModel.kField_name: name,
});
...
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