如何按未在显示列中声明的 属性 对 angular material table 行进行排序

How to sort angular material table rows by property not declared in displayed Columns

这是创建我的 table模型的代码:

const rowData = [{
        id: '74b0d34f-1e2f-47d1-b1ea-55658d5d750f',
        assetId: '9ff317cd-3b75-433d-a32b-949c67b84eee',
        type: 'DATA_RECORDING',
        eventStart: '2019-05-01T00:00:00Z',
        eventEnd: '2019-05-01T00:00:00Z',
        assetName: 584,
        milliseconds: 3524583453452
},{
        id: '74b0d34f-1e2f-47d1-b1ea-55658d5d7534',
        assetId: '9ff317cd-3b75-433d-a32b-949c67b84eee',
        type: 'DATA_RECORDING',
        eventStart: '2019-05-01T00:00:00Z',
        eventEnd: '2019-05-01T00:00:00Z',
        assetName: 584,
        milliseconds: 35245824528
},{
        id: '74b0d34f-1e2f-47d1-b1ea-55658d5d7545',
        assetId: '9ff317cd-3b75-433d-a32b-949c67b84eee',
        type: 'DATA_RECORDING',
        eventStart: '2019-05-01T00:00:00Z',
        eventEnd: '2019-05-01T00:00:00Z',
        assetName: 584,
        milliseconds: 13219245949
}];

tableModel(data: Array<dataObj>) {
    return [{
        headers: ['DATE LOGGED', 'ASSET ID', 'DIVISION NAME', 'TYPE'],
        displayedColumns: ['eventStart', 'assetId', 'divisionName', 'type'],
        rows: rowData
    }];
}

我希望 table 行的默认排序基于行对象的 'millisecond' 属性,但我不想在 table。有没有办法做到这一点?我在 docs 中看不到任何相关信息,设置 matSortStart="desc" 只是根据第一列(在本例中为 eventStart)对 table 进行排序。

你必须做两件事来实现:

  1. 添加 matSortActive="milliseconds" 以便按此列进行排序,您已经知道 matSortDirection="desc" 添加到 <table mat-table> 元素后会起作用
  2. 添加 css 隐藏毫秒列(我们放在最后),因为您不想显示它

相关CSS:

td.mat-cell:last-of-type,
th.mat-header-cell:last-of-type
{display:none;}

相关HTML:

<table mat-table [dataSource]="dataSource" matSort matSortActive="milliseconds" matSortDirection="desc" class="mat-elevation-z8">

    <!-- id Column -->
    <ng-container matColumnDef="id">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> id. </th>
        <td mat-cell *matCellDef="let element"> {{element.id}} </td>
    </ng-container>

    <!-- type Column -->
    <ng-container matColumnDef="type">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> type </th>
        <td mat-cell *matCellDef="let element"> {{element.type}} </td>
    </ng-container>

    <!-- assetName Column -->
    <ng-container matColumnDef="assetName">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> assetName </th>
        <td mat-cell *matCellDef="let element"> {{element.assetName}} </td>
    </ng-container>

    <!-- milliseconds Column 
  -->
    <ng-container matColumnDef="milliseconds" class='hideMe'>
        <th mat-header-cell *matHeaderCellDef mat-sort-header> milliseconds </th>
        <td mat-cell *matCellDef="let element"> {{element.milliseconds}} </td>
    </ng-container>

    <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
    <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
</table>

完成工作stackblitz is available here