Angular material not able to display data

Question

Could someone tell me please what i'm doing wrong, i can't seem to get my data displayed on the tavle after being called from backend, though it is seen on the console

Ts

export class PatientsComponent implements OnInit  {
  patient: Patient [] = [];

  public displayedColumns = ['id', 'fullname', 'tribe', 'age' ];
  public dataSource = new MatTableDataSource<Patient>();

  constructor(private userService:UserService) { }

  ngOnInit(): void {
   
    this.userService.getPatients().subscribe((res)=>{
      console.log(res);
      this.dataSource.data = res;
    })
  }

}

Html

 <table mat-table [dataSource]="dataSource" >
  
        <ng-container matColumnDef="id">
          <th mat-header-cell *matHeaderCellDef> Id </th>
          <td mat-cell *matCellDef="let element"> {{element.id}} </td>
        </ng-container>
   
        <ng-container matColumnDef="fullname">
          <th mat-header-cell *matHeaderCellDef>First Name </th>
          <td mat-cell *matCellDef="let element"> {{element.fullname}} </td>
        </ng-container>
      
        <ng-container matColumnDef="tribe">
          <th mat-header-cell *matHeaderCellDef> Tribe </th>
          <td mat-cell *matCellDef="let element"> {{element.tribe}} </td>
        </ng-container>
      
       
        <ng-container matColumnDef="age">
          <th mat-header-cell *matHeaderCellDef>Age</th>
          <td mat-cell *matCellDef="let element"> {{element.age}} </td>
        </ng-container>
       
        <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
        <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
      </table>

Interface

export interface Patient {
    id: String,
    fullname: String,
    tribe : String,
    age: String
}

AppMaterialModule

import {NgModule} from '@angular/core';
import {MatTableModule} from '@angular/material/table';
import {MatPaginatorModule} from '@angular/material/paginator';
import {MatInputModule} from '@angular/material/input';
import {MatProgressSpinnerModule} from '@angular/material/progress-spinner';
import {MatSortModule} from '@angular/material/sort';

@NgModule({
// since we're exporting these modules, add them to export
    exports: [
        MatTableModule,
        MatSortModule,
        MatProgressSpinnerModule,
        MatInputModule,
        MatPaginatorModule,
       
    ]
})
export class AppMaterialModule {}

app,module.ts

import { AppMaterialModule } from "./app.material-module";

@NgModule({
  declarations: [
    // ....
  ],
  imports: [
    // .........
    AppMaterialModule,

  ],
  // ...
})
export class AppModule { }

On page realoading i get an empty table that contains like hundred of empty rows andi can't just figure out why. Can somebody help me please

And on console there this

Result

Answer 1

Try importing the modules directly in app.module.ts