[英]Reload page after CRUD
我正在尋找一種在對用戶透明的 CRUD 操作后重新加載頁面的方法。
實際上在創建或刪除之后,我必須重新加載頁面以顯示我的操作。
我使用 api 來制作這個,當我將它與 json 文件一起使用時,它工作正常。
謝謝
刪除示例:
dataSource = new MatTableDataSource();
displayedColumns = ['first_name', 'middle_name', 'last_name', 'mail', 'role', 'action'];
action: any;
selectedUser: User;
@Input() user: User;
data: any;
@ViewChild(MatSort, {static: true}) sort: MatSort;
@ViewChild(MatPaginator, {static: true}) paginator: MatPaginator;
constructor(private formBuilder: FormBuilder, private userService: UserService, public dialog: MatDialog) {
}
ngOnInit() {
this.dataSource.sort = this.sort;
this.dataSource.paginator = this.paginator;
this.userService.getUsers()
.subscribe(
(response) => {
this.dataSource.data = response;
},
(error) => {
console.log('error ' + error);
}
);
}
onDelete(selectedUser){
Swal.fire({
title: 'Are you sure?',
text: "You won't be able to revert this!",
type: 'warning',
showCancelButton: true,
confirmButtonColor: '#3085d6',
cancelButtonColor: '#d33',
confirmButtonText: 'Yes, delete it!'
}).then((result) => {
if (result.value) {
this.userService.delete(selectedUser.id).subscribe(res => {
this.dataSource.data.splice(selectedUser.id, 1);
});
Swal.fire(
'Deleted!',
'User has been deleted.',
'success'
)
}
})
}
html 代碼
讓我知道您是否需要更多代碼,以及代碼的哪一部分。
<div class="mat-elevation-z8">
<table mat-table [dataSource]="dataSource" matSort multiTemplateDataRows >
<!-- First name Column -->
<ng-container matColumnDef="first_name">
<th mat-header-cell *matHeaderCellDef mat-sort-header> First name </th>
<td mat-cell *matCellDef="let element"> {{element.first_name}} </td>
<label>
<input class="table-input" *ngIf="selectedUser" type="text">
</label>
</ng-container>
<!-- Middle name Column -->
<ng-container matColumnDef="middle_name">
<th mat-header-cell *matHeaderCellDef mat-sort-header>Middle name </th>
<td mat-cell class="status" *matCellDef="let element">{{element.middle_name}}</td>
</ng-container>
<!-- Last name Column -->
<ng-container matColumnDef="last_name">
<th mat-header-cell *matHeaderCellDef mat-sort-header> Last name </th>
<td mat-cell *matCellDef="let element"> {{element.last_name}} </td>
</ng-container>
<!-- Email Column -->
<ng-container matColumnDef="mail">
<th mat-header-cell *matHeaderCellDef mat-sort-header> Email </th>
<td mat-cell *matCellDef="let element"> {{element.mail}} </td>
</ng-container>
<!-- Role Column -->
<ng-container matColumnDef="role">
<th mat-header-cell *matHeaderCellDef mat-sort-header> Role </th>
<td mat-cell *matCellDef="let element"> {{getRole(element)}} </td>
</ng-container>
<!-- Actions Column -->
<ng-container matColumnDef="action">
<th mat-header-cell *matHeaderCellDef mat-sort-header> Actions </th>
<td mat-cell *matCellDef="let row">
<button mat-raised-button color="primary" class="editUserBtn" (click)="openEditDialog(row)"><mat-icon class="edit-icon" >launch</mat-icon><span>Edit</span></button>
<button mat-raised-button color="warn" class="deleteUserBtn" (click)="onDelete(row)"><mat-icon class="delete-icon" >delete_outline</mat-icon><span>Delete</span></button>
</td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
</table>
<mat-paginator [pageSize]="5" [pageSizeOptions]="[5, 10, 15]" showFirstLastButtons></mat-paginator>
</div>
</div>
在這種情況下,您將不得不使用BehaviorSubject
。 BehaviorSubject
會持續監聽訂閱者並在有next
發射時進行更新。
dataSource: BehaviorSubject<MatTableDataSource[]> = new BehaviorSubject([]);
onDelete(selectedUser) {
Swal.fire({
title: 'Are you sure?',
text: "You won't be able to revert this!",
type: 'warning',
showCancelButton: true,
confirmButtonColor: '#3085d6',
cancelButtonColor: '#d33',
confirmButtonText: 'Yes, delete it!'
}).then(result => {
if (result.value) {
this.userService.delete(selectedUser.id).subscribe(res => {
this.dataSource.value.data.splice(selectedUser.id, 1);
this.dataSource.next(this.dataSource.value);
});
Swal.fire('Deleted!', 'User has been deleted.', 'success');
}
});
}
其中 MatTableDataSource 應該是您的數據類型。
要刷新材料數據表,最簡單的方法是刷新整個數據源:
dataSource = new MatTableDataSource();
displayedColumns = ['first_name', 'middle_name', 'last_name', 'mail', 'role', 'action'];
action: any;
selectedUser: User;
@Input() user: User;
data: any;
@ViewChild(MatSort, {static: true}) sort: MatSort;
@ViewChild(MatPaginator, {static: true}) paginator: MatPaginator;
constructor(private formBuilder: FormBuilder, private userService: UserService, public dialog: MatDialog) {
}
ngOnInit() {
this.loadDataTable();
}
loadDataTable() {
this.dataSource.sort = this.sort;
this.dataSource.paginator = this.paginator;
this.userService.getUsers()
.subscribe(
(response) => {
this.dataSource.data = response;
},
(error) => {
console.log('error ' + error);
}
);
}
onDelete(selectedUser){
Swal.fire({
title: 'Are you sure?',
text: "You won't be able to revert this!",
type: 'warning',
showCancelButton: true,
confirmButtonColor: '#3085d6',
cancelButtonColor: '#d33',
confirmButtonText: 'Yes, delete it!'
}).then((result) => {
if (result.value) {
this.userService.delete(selectedUser.id).subscribe(res => {
this.loadDataTable();
Swal.fire(
'Deleted!',
'User has been deleted.',
'success'
);
},
// Probably you want to add some error handling here:
(error) => {
console.error(error);
});
}
})
Pipe 使用get 調用刪除調用。
deleteUser(){ // called on click of delete
this.userSvc
.deleteUser() // service function that deletes a user. Could be any of CUD (Create, Update or Delete
.pipe(
switchMap(data => this.userSvc.getUsers()) // pipe the result and perform retrieve.
)
.subscribe( result => this.users = result); // finally set the result on a field to show on the component template.
}
這是一個快速示例https://stackblitz.com/edit/angular-agpxba?embed=1&file=src/app/app.component.ts
還有其他方法可以實現相同的目的,特別是如果我們使用 Application State 管理框架,如ngrx。 我們可以識別 state 已更改並觸發檢索 API。 這里的一個很簡單。 樣品在 15 分鍾內被快速編碼。
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