Iterate through dataSource in mat-table Angular

Issue

I have problem with iterations through dataSource, where I have data for mat-table

   <div *ngFor="let element of arrayMain" id = "{{element}}" class="my_item">
      <div><span class="skuska"><span class="mat-subheading-2">{{element}}</span></span></div>
      <mat-table #table [dataSource]="dataSource[1]" matSort>
        <ng-container matColumnDef="{{column.id}}" *ngFor="let column of columnNames">
          <mat-header-cell *matHeaderCellDef mat-sort-header > {{column.value}} </mat-header-cell>
          <mat-cell *matCellDef="let element" [style.background]="element[column.id].color"> <div class="mat-cell-inner">{{element[column.id].name}}</div></mat-cell>

        </ng-container>

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

The row with this data contain the problem

<mat-table #table [dataSource]="dataSource[1]" matSort>

I can only change the data when i change the number inside the array:

dataSource[0],dataSource[1]....,dataSource[n]

I try to use *ngFor cause

<mat-table *ngFor = "let calendars of dataSource" #table [dataSource]="{{calendars}}" matSort>

but it displays an error:

ng: Parser Error: Got interpolation ({{}}) where expression was expected at column 0 in [{{calendars}}] in @101:73

I fill the dataSource in function

for(identificator = 0; identificator < n; identificator++)
       createData(identificator) 

createData(identificator) {
   some code...
       .
       . 
       .
    this.dataSource[identificator] = new MatTableDataSource(testData);
    this.dataSource[identificator].sort = this.sort;

}

How can I fix it? Any ideas? Thank you !

Solution

Try using index with ngFor to track your iterations. I hope its helpful.

<div *ngFor="let element of arrayMain, let myIndex=index" id="{{element}}" class="my_item"> 
    <div>
        <span class="skuska">
            <span class="mat-subheading-2">{{element}}</span>
        </span>
    </div> 
    <mat-table #table [dataSource]="dataSource[myIndex]" matSort> 
        <ng-container matColumnDef="{{column.id}}" *ngFor="let column of columnNames"> 
            <mat-header-cell *matHeaderCellDef mat-sort-header>
                {{column.value}} 
            </mat-header-cell> 

            <!-- your same code -->

        </ng-container>
    </mat-table>
</div>

Answered By - Abhishek Kumar