Primeng: Composite key for dataKeys

[Raviowitch]

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Plunkr Case (Bug Reports)
Please fork the plunkr below and create a case demonstrating your bug report. Issues without a plunkr have much less possibility to be reviewed.

http://plnkr.co/edit/qtZi5lB3DjkNt7Kdivg9?p=preview

Current behavior
For now, datakey is only for one column.
example: dataKey="vin"

Expected behavior
Be able to give a array of column name.

What is the motivation / use case for changing the behavior?
Expandable row for table with composite key.

Please tell us about your environment:

• Angular version: 5.0
  

• PrimeNG version: 5.0
  

• Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]
  

[cagataycivici]

Like [dataKey]="['vin','brand']"?

[getjavajobs]

Hi,

I think that all these raised issues are related to the same problem - dataKey can't be always represented as single property of row:

https://github.com/primefaces/primeng/issues/5383
https://github.com/primefaces/primeng/issues/5574
https://github.com/primefaces/primeng/issues/5645

In my case I have array of arrays (trying to build table with expandable rows) and the dataKey for me is the rowData[0][0]

Is it possible to specify function that will generate unique dataKey based on rowData? In this case it can solve all problems

[ammar91]

@cagataycivici Any plan to add this feature in the upcoming release?

[togbyte]

I need this feature as well.

[CyleClone]

Selection and Datakey isn't compatible with one another. What we'd need would be to be able to use datakey for row grouping, but have a selection that would still select (and mark) specific rows, not be based on the field used in datakey.

[niran-manandhar]

any solutions yet?

[SarahShhaltough]

...
dataKey="key1" dataKey="key2">
I use this way and it works fine :D

[sanchaykothari]

I am using row grouping table with single selection and facing the same issue. Both The Functionality uses dataKey. Any alternative to do so ?

[DevByColton]

I created a pipe to add a compositeDataKey property to the object. It will join the values of the object properties together to create a unique value for each object. I have not tried this on any other component, only p-table. Example below.

@Pipe({
  name: 'compositeDataKey'
})
export class CompositeDataKeyPipe implements PipeTransform {

  /**
   * Appends the compositeDataKey property to the object.
   * This 'compositeDataKey' property should be set to the [dataKey] input on p-table.
   *
   *
   * Example:
   *
   * <p-table [dataKey]="'compositeDataKey'">       <!-- dataKey input -->
   *   <ng-template pTemplate="header">
   *     ...
   *   </ng-template>
   *   <ng-template pTemplate="body">
   *     <tr>
   *       <td>
   *         <a href="#" [pRowToggler]="object | compositeDataKey:['property1', 'property2']">  <!-- compositeDataKey pipe -->
   *            <i [ngClass]="expanded ? 'pi pi-chevron-down' : 'pi pi-chevron-right'"></i>
   *         </a>
   *       </td>
   *     </tr>
   *   </ng-template>
   * </p-table>
   *
   * @param object
   * @param properties
   */
  transform(object: any, properties: any[]): any {
    if (object && properties?.length) {
      object.compositeDataKey = properties.map(property => object[property]).join('-');
    }
    return object;
  }
}

[suhailk4]

dataKey also takes a function as reference ( function without parenthesis) so you need to create a function and bind that to datakey , the function should return the keys that you want to combine with different columns as in primeNG we have
public static resolveFieldData(data: any, field: any): any {
if(data && field) {
if (this.isFunction(field)) {
return field(data);
}
else if(field.indexOf('.') == -1) {
return data[field];
}
else {
let fields: string[] = field.split('.');
let value = data;
for(let i = 0, len = fields.length; i < len; ++i) {
if (value == null) {
return null;
}
value = value[fields[i]];
}
return value;
}
}
else {
return null;
}
}
in above function it is checking if we have field a funtion , if yes then it calls the function we passed that function returns composite keys .

NOTE: The above function is just for understanding which is already in library so all we need to is below code
----------------------HERE IS THE WAY TO IT --------------

in html [datakey]="someFucntion"

in .ts

someFunction(data: dataType) {

 // return data.field3 + data.field2 + data.field3 and so on ...
return data.vin + data.brand;

}

[EthanTuning]

Is there any word on if this is possible?

[suhailk4]

Is there any word on if this is possible?

please see my above comment - https://github.com/primefaces/primeng/issues/5383#issuecomment-728713523

[gokce-akcan]

Above solution didn't work for table with checkboxes. It checked all items in the list when using function. https://github.com/primefaces/primeng/issues/5383#issuecomment-728713523

Added a new unique key to the data.