当我尝试从火库，火库获取指定用户时遇到问题。
export class TaskService {
tasksCollection: AngularFirestoreCollection<Task>;
taskDoc: AngularFirestoreDocument<Task>;
tasks: Observable<Task[]>;
task: Observable<Task>;
constructor(private afs: AngularFirestore) {
this.tasksCollection = this.afs.collection('tasks', ref => ref.orderBy('title', 'asc'));
}
getTask(id: string): Observable<Task> {
this.taskDoc = this.afs.doc<Task>(`clients/${id}`);
this.task = this.taskDoc.snapshotChanges().pipe(map(action => {
if (action.payload.exists === false) {
return null;
} else {
const data = action.payload.data() as Task;
data.id = action.payload.id;
return data;
}
}));
return this.task;
}
}
这是我的文件Component.ts
export class TaskDetailsComponent implements OnInit {
id: string;
task: Task;
hasHours = false;
showHoursOnUpdate: false;
constructor(
private taskService: TaskService,
private router: Router,
private route: ActivatedRoute
) { }
ngOnInit() {
// Get id from url
this.id = this.route.snapshot.params.id;
// Get client
this.taskService.getTask(this.id).subscribe(task => {
if (task != null) {
if (task.hours > 0) {
this.hasHours = true;
}
}
this.task = task;
});
console.log(this.id);
console.log(this.task);
}
}
id 的结果是好的。但对象（任务）的结果未定义。
P.S我也有获取所有用户和添加新用户的功能，所以如果这是相关的，请在评论中告诉我
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