toDataSourceRequestString

Copy Code import {
     toDataSourceRequestString,
     translateDataSourceResultGroups,
     translateAggregateResults
} from '@progress/kendo-data-query';

export class Service {
 private BASE_URL: string = '...';

 constructor(private http: Http) { }

 // Omitted for brevity...

 private fetch(state: DataSourceRequestState): Observable<DataResult> {
  const queryStr = `${toDataSourceRequestString(state)}`; //serialize the state
  const hasGroups = state.group && state.group.length;

  return this.http
      .get(`${this.BASE_URL}?${queryStr}`) //send the state to the server
      .map(response => response.json())
      .map(({Data, Total, AggregateResults}) => // process the response
          (<GridDataResult>{
              //if there are groups convert them to compatible format
              data: hasGroups ? translateDataSourceResultGroups(Data) : Data,
              total: Total,
              // convert the aggregates if such exists
              aggregateResult: translateAggregateResults(AggregateResults)
          })
      );
 }
}