Tuesday, 23 April 2019

how to display paging results using paging id using ngx-datatable & angular?

Requirement : Showing dynamic data using ngx-datatable and use paging using scroll id

Description :

i have a dynamic data where i am displaying it using the ngx-datatable in angular and here every thing works but the issue i m not sure how to apply the paging using the page_id (sent to server using post body). Here i am getting the page_id along with the api response this is 1st api call. here page_id has to be sent as body for the very same api for getting the rest of results. ex: suppose i have 20 results in the 1ST api call i will get the 10 records and a page id by using the page id how can i get the next 10 results

what i implemented :
getting data and displaying it in table basic paging applied

below is my code :

Result=[];
  reorderable: boolean = true;
  selected = [];
  rows = [];
  columns = [];
  DataArray = [];
  Results = {
    "data": [
      {
        "_score": 0.36464313,
        "_type": "data",
        "_id": "abcd",
        "_source": {
          "filter": "data",
          "information": {
            "product_id": "abcd",
            "creation_utctime": "1477335693653"
          },
          "enduser": "free"
        },
        "_index": "dell_laptop"
      },
      {
        "_score": 0.36464314,
        "_type": "data",
        "_id": "abcde",
        "_source": {
          "filter": "data",
          "information": {
            "product_id": "abcde",
            "creation_utctime": "1477335693653"
          },
          "enduser": "free"
        },
        "_index": "lenovo_laptop"
      },
      {
        "_score": 0.36464314,
        "_type": "data",
        "_id": "abcdef",
        "_source": {
          "filter": "data",
          "information": {
            "product_id": "abcde",
            "creation_utctime": "1477335693653"
          },
          "enduser": "free"
        },
        "_index": "lenovo_laptop"
      }
    ],
    "total": 4,
    "page_id": "WpNdVJMMjlJVnJTYTFuUklB"
  }



  LoadInfo(){
    this.DataArray = ["filter","information.product_id","information.creation_utctime","enduser"];
    this.rows=[];
    this.Result = this.Results['data'];
// tslint:disable-next-line: forin
    for (var res in this.Result) {
      var row = {};
      for (var key in this.Result[res]['_source']) {
        if (typeof this.Result[res]['_source'][key] === 'object') {
          for (var k in this.Result[res]['_source'][key]) {
            let temp = key + "." + k;
            row[temp] = this.Result[res]['_source'][key][k];
          }
        } else {
          row[key] = this.Result[res]['_source'][key]
        }
        row['_id'] = this.Result[res]['_id'];
      }
      this.rows.push(row);
    }
    console.log(this.rows);

  }

  onActivate(event) {
    // console.log('Activate Event', event);
  }

  onSelect({ selected }) {
    // console.log('Select Event', selected, this.selected);

    this.selected.splice(0, this.selected.length);
    this.selected.push(...selected);
  }

html code:

<button type="button" (click)="LoadInfo()">LoadData</button>

 <div>
     <ngx-datatable class="material ui" [rows]="rows" [columnMode]="'force'" [headerHeight]="50"
     [footerHeight]="50" [limit]="2" [rowHeight]="'auto'" [reorderable]="reorderable" [selected]="selected"
     [selectionType]="'checkbox'" [scrollbarH]="true" [sortType]="'multi'" (activate)="onActivate($event)"
    (select)='onSelect($event)'>

    <ngx-datatable-column [width]="30" [sortable]="true" [canAutoResize]="false" [draggable]="false"
    [resizeable]="false" class="uih">
    <ng-template ngx-datatable-header-template let-value="value" let-allRowsSelected="allRowsSelected"
      let-selectFn="selectFn">
      <input type="checkbox" [checked]="allRowsSelected" (change)="selectFn(!allRowsSelected)" />
    </ng-template>
    <ng-template ngx-datatable-cell-template let-value="value" let-isSelected="isSelected"
      let-onCheckboxChangeFn="onCheckboxChangeFn">
      <input type="checkbox" [checked]="isSelected" (change)="onCheckboxChangeFn($event)" />
    </ng-template>
  </ngx-datatable-column>
  <ngx-datatable-column *ngFor="let attr of DataArray" [sortable]="true" prop= name=>
  </ngx-datatable-column>

     </ngx-datatable>
</div>

stackblitz link : https://stackblitz.com/edit/angular-secw8u

Note: even though if there is pageid also some times after 10 records there may not be more records also



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