Is there a way to efficiently update an angular table with material table dynamically?

Here is my current setup:

export class TableComponent<T> implements OnInit {

    displayedColumns: Array<string> = [];
    dataSource: MatTableDataSource<T> = new MatTableDataSource();

    constructor(public asmErrorServ: AssemblyErrorService) { }

    ngOnInit(): void {
        this.displayedColumns = ['Message Type', 'Message', 'Message Date'];
        this.dataSource = (<any>this.asmErrorServ).asmErrorLog;
    }
}

The data source is updated from the asmErrorServ, which stores real-time errors or warnings in an array. This part of the code can be found in the error service:

export class AssemblyErrorService{
...

error(message: string): void {
        let newError: asmMessage = { type: 'error', message: message, time: Date.now() };
        this.asmErrorLog.push(newError);

        this._snackBar.open(this.generateSnackbarString(newError), 'Dismiss', {
            duration: 3000,
            horizontalPosition: this.horizontalPosition,
            verticalPosition: this.verticalPosition,
            panelClass: ['red-snackbar', 'login-snackbar'],
        });
    }
}

The table does not update in real time despite these changes. I am seeking advice on how to address this issue. Any suggestions?

Answer №1

To ensure the data source is refreshed correctly, follow these steps:

newError = {
  type: 'error',
  message: 'An error occurred'
};
this.errorLog.push(newError);
this.data = this.errorLog;

Your table should now display live updates.

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