I’m looking to have n number of tables in one component with n number of different data sources, but with the same columns. These data sources need to be broken up. The user has a simple form that can add a new row to any one of those tables, and then from within the addRow function I will call renderRows() on that specific table. I’m using ViewChild to accomplish this, but for some reason only one of the n tables are actually updating on the fly when a row is added.
In the Stackblitz, what I want is that both tables look the exact same, so they have the same data and are rendered the same. When clicking the "Rerender" button, both tables should get a row added to their datasource.
This code is really close what I’m working with, and it also shows my problem. Here is the Stackblitz: https://stackblitz.com/edit/angular-mat-table-render-rows-1aelgx?file=app%2Ftable-filtering-example.html,app%2Ftable-filtering-example.ts
and in case that link doesn’t work.
html
<div class="example-container mat-elevation-z8">
<mat-table #table [dataSource]="table_data">
<!-- Position Column -->
<ng-container matColumnDef="position">
<mat-header-cell *matHeaderCellDef> No. </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.position}} </mat-cell>
</ng-container>
<!-- Name Column -->
<ng-container matColumnDef="name">
<mat-header-cell *matHeaderCellDef> Name </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.name}} </mat-cell>
</ng-container>
<!-- Weight Column -->
<ng-container matColumnDef="weight">
<mat-header-cell *matHeaderCellDef> Weight </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.weight}} </mat-cell>
</ng-container>
<!-- Symbol Column -->
<ng-container matColumnDef="symbol">
<mat-header-cell *matHeaderCellDef> Symbol </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.symbol}} </mat-cell>
</ng-container>
<mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
<mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>
</mat-table>
<mat-table #second_table [dataSource]="second_table_data">
<!-- Position Column -->
<ng-container matColumnDef="position">
<mat-header-cell *matHeaderCellDef> No. </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.position}} </mat-cell>
</ng-container>
<!-- Name Column -->
<ng-container matColumnDef="name">
<mat-header-cell *matHeaderCellDef> Name </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.name}} </mat-cell>
</ng-container>
<!-- Weight Column -->
<ng-container matColumnDef="weight">
<mat-header-cell *matHeaderCellDef> Weight </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.weight}} </mat-cell>
</ng-container>
<!-- Symbol Column -->
<ng-container matColumnDef="symbol">
<mat-header-cell *matHeaderCellDef> Symbol </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.symbol}} </mat-cell>
</ng-container>
<mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
<mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>
</mat-table>
</div>
<button (click)="addRow()">ReRender</button>
<!-- Copyright 2018 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license -->
ts
import { Component, ViewChild } from '@angular/core';
import { MatTable } from '@angular/material';
/**
* @title Table with filtering
*/
@Component({
selector: 'table-filtering-example',
styleUrls: ['table-filtering-example.css'],
templateUrl: 'table-filtering-example.html',
})
export class TableFilteringExample {
@ViewChild(MatTable) table: MatTable<Element>;
@ViewChild(MatTable) second_table: MatTable<Element>;
displayedColumns = ['position', 'name', 'weight', 'symbol'];
table_data: any[] = [];
second_table_data: any[] = [];
addRow() {
this.table_data.push(ELEMENT_DATA[this.table_data.length])
this.second_table_data.push(ELEMENT_DATA[this.table_data.length])
console.log(this.table_data)
console.log(this.second_table_data)
this.second_table.renderRows();
this.table.renderRows();
}
}
export interface Element {
name: string;
position: number;
weight: number;
symbol: string;
}
const ELEMENT_DATA: Element[] = [
{position: 1, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
{position: 2, name: 'Helium', weight: 4.0026, symbol: 'He'},
{position: 3, name: 'Lithium', weight: 6.941, symbol: 'Li'},
{position: 4, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
{position: 5, name: 'Boron', weight: 10.811, symbol: 'B'},
{position: 6, name: 'Carbon', weight: 12.0107, symbol: 'C'},
{position: 7, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
{position: 8, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
{position: 9, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
{position: 10, name: 'Neon', weight: 20.1797, symbol: 'Ne'},
{position: 11, name: 'Sodium', weight: 22.9897, symbol: 'Na'},
{position: 12, name: 'Magnesium', weight: 24.305, symbol: 'Mg'},
{position: 13, name: 'Aluminum', weight: 26.9815, symbol: 'Al'},
{position: 14, name: 'Silicon', weight: 28.0855, symbol: 'Si'},
{position: 15, name: 'Phosphorus', weight: 30.9738, symbol: 'P'},
{position: 16, name: 'Sulfur', weight: 32.065, symbol: 'S'},
{position: 17, name: 'Chlorine', weight: 35.453, symbol: 'Cl'},
{position: 18, name: 'Argon', weight: 39.948, symbol: 'Ar'},
{position: 19, name: 'Potassium', weight: 39.0983, symbol: 'K'},
{position: 20, name: 'Calcium', weight: 40.078, symbol: 'Ca'},
];
/** Copyright 2018 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license */
>Solution :
You can select the table by its template reference @ViewChild('TemplateRef') – https://angular.io/api/core/ViewChild#description.
In your example, you are basically pushing the same data into the same table twice.
Update the following lines as shown below:
export class TableFilteringExample {
@ViewChild('table') table: MatTable<Element>;
@ViewChild('second_table') second_table: MatTable<Element>;
. . .
}