Javascript 如何使用Angular 8+;来自firebase的数据?
我有一个带有firebase数据的材料表的角度PWA,显示了数据,分页器正在工作,但我也想对其数据进行排序,但mat sort不起作用。它显示了对数据进行排序的箭头,但单击箭头时,数据未排序 我遵循了Angular Material的文档 组件模板中的表:Javascript 如何使用Angular 8+;来自firebase的数据?,javascript,angular,firebase,google-cloud-firestore,angularfire2,Javascript,Angular,Firebase,Google Cloud Firestore,Angularfire2,我有一个带有firebase数据的材料表的角度PWA,显示了数据,分页器正在工作,但我也想对其数据进行排序,但mat sort不起作用。它显示了对数据进行排序的箭头,但单击箭头时,数据未排序 我遵循了Angular Material的文档 组件模板中的表: <ng-container matColumnDef="movimento"> <th mat-header-cell *matHeaderCellDef mat-sort-heade
<ng-container matColumnDef="movimento">
<th mat-header-cell *matHeaderCellDef mat-sort-header>Tipo de movimento</th>
<td mat-cell *matCellDef="let movimento"> {{movimento.mapValue.fields.tipo_movimento.stringValue}}
</td>
</ng-container>
<ng-container matColumnDef="valor">
<th mat-header-cell *matHeaderCellDef mat-sort-header>Valor</th>
<td mat-cell *matCellDef="let movimento">
{{movimento.mapValue.fields.valor.doubleValue | number:'1.1-2'}}
{{movimento.mapValue.fields.valor.integerValue}} €
</td>
</ng-container>
<ng-container matColumnDef="data">
<th mat-header-cell *matHeaderCellDef mat-sort-header>Data</th>
<td mat-cell *matCellDef="let movimento"> {{movimento.mapValue.fields.data.timestampValue | date}}
</td>
</ng-container>
<ng-container matColumnDef="desc">
<th mat-header-cell *matHeaderCellDef mat-sort-header>Descrição</th>
<td mat-cell *matCellDef="let movimento"> {{movimento.mapValue.fields.desc.stringValue}}</td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns; sticky: true"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
</table>
<mat-paginator [pageSizeOptions]="[10, 20, 40]" showFirstLastButtons></mat-paginator>
蒂波德莫维门托酒店
{{movimento.mapValue.fields.tipo_movimento.stringValue}
英勇
{{movimento.mapValue.fields.valor.doubleValue}编号:'1.1-2'}
{{movimento.mapValue.fields.valor.integerValue}}
资料
{{movimento.mapValue.fields.data.timestampValue | date}
描述
{{movimento.mapValue.fields.desc.stringValue}}
组成部分:
@Component({
selector: 'app-movimentar',
templateUrl: './visualizar-movimentos.component.html',
styleUrls: ['./visualizar-movimentos.component.css']
})
export class VisualizarMovimentosComponent implements OnInit {
user: firebase.User;
userData;
displayedColumns: string[] = ['movimento', 'valor', 'data', 'desc'];
dataSource = new MatTableDataSource<Movimentos>();
@ViewChild(MatPaginator, { static: false })
set paginator(value: MatPaginator) {
this.dataSource.paginator = value;
}
@ViewChild(MatSort, { static: false }) sort: MatSort;
constructor(private auth: AuthService,
private router: Router,
private afs: AngularFirestore) { }
ngOnInit() {
this.auth.getUserState()
.subscribe(user => {
this.user = user;
this.getUserData();
});
}
/* loadLessonsPage() {
this.dataSource._orderData;
debugger
} */
getUserData(): void {
this.auth.getUserData(this.user.uid)
.subscribe(user => {
this.userData = user;
this.dataSource = new MatTableDataSource(this.userData._document.proto.fields.movimentos.arrayValue.values);
this.dataSource.paginator = this.paginator;
this.dataSource.sort = this.sort;
});
}
login() {
this.router.navigate(['login']);
}
logout() {
this.auth.logout();
this.router.navigate(['inicio']);
}
register() {
this.router.navigate(['/register']);
}
trackByUid(index, item) {
return item.uid;
}
}```
Thanks for the help in advance.
@组件({
选择器:“app movimentar”,
templateUrl:'./visualizar movimentos.component.html',
styleUrls:['./visualizar movimentos.component.css']
})
导出类VisualizarMovimentosComponent实现OnInit{
用户:firebase.user;
用户数据;
显示的列:字符串[]=['movimento','valor','data','desc'];
dataSource=新MatTableDataSource();
@ViewChild(MatPaginator,{static:false})
设置分页器(值:MatPaginator){
this.dataSource.paginator=值;
}
@ViewChild(MatSort,{static:false})sort:MatSort;
构造函数(私有auth:AuthService,
专用路由器:路由器,
私人afs:AngularFirestore{}
恩戈尼尼特(){
this.auth.getUserState()
.subscribe(用户=>{
this.user=用户;
这是getUserData();
});
}
/*loadLessonsPage(){
此.dataSource.\u orderData;
调试器
} */
getUserData():void{
this.auth.getUserData(this.user.uid)
.subscribe(用户=>{
this.userData=user;
this.dataSource=新MatTableDataSource(this.userData.\u document.proto.fields.movimentos.arrayValue.values);
this.dataSource.paginator=this.paginator;
this.dataSource.sort=this.sort;
});
}
登录(){
this.router.navigate(['login']);
}
注销(){
this.auth.logout();
this.router.navigate(['inicio']);
}
寄存器(){
this.router.navigate(['/register']);
}
trackByUid(索引,项){
返回item.uid;
}
}```
提前谢谢你的帮助。
您需要像这样在表中以及要对数据进行排序的列上指定mat sort
<table matSort (matSortChange)="sortData($event)">
</table>
在加载数据时,您已经完成了这一部分
getUserData(): void {
this.auth.getUserData(this.user.uid)
.subscribe(user => {
this.userData = user;
this.dataSource = new MatTableDataSource(this.userData._document.proto.fields.movimentos.arrayValue.values);
this.dataSource.paginator = this.paginator;
this.dataSource.sort = this.sort;
});
}
现在应该可以了 问题在于来自firebase的数据,它与mat排序不兼容。要解决此问题,您需要一个类似以下的地图: 这是地图
return data.reduce((acc, value) => {
return [
...acc,
Object.entries(value.mapValue.fields).reduce((accValue, [key, value]) => {
return {
...accValue,
[key]: Object.values(value)[0]
}
}, {})
]
}, [])
}
它不工作,在sortData()函数中需要什么?此外,第一个this.sort未被识别,您不需要实现它。这只是供参考。只需关注表标记中的matSort,它仍然不起作用。请在getUserData()中尝试此操作。setTimeout(()=>this.dataSource.sort=this.sort);它给了我一个错误:类型“void”上不存在属性“setTimeout”。ts(2339)
getUserData(): void {
this.auth.getUserData(this.user.uid)
.subscribe(user => {
this.userData = user;
this.dataSource = new MatTableDataSource(this.userData._document.proto.fields.movimentos.arrayValue.values);
this.dataSource.paginator = this.paginator;
this.dataSource.sort = this.sort;
});
}
return data.reduce((acc, value) => {
return [
...acc,
Object.entries(value.mapValue.fields).reduce((accValue, [key, value]) => {
return {
...accValue,
[key]: Object.values(value)[0]
}
}, {})
]
}, [])
}