selections for editable grid in pagination

Question

hi, 
 I have implemented pagination for an editable grid, but when i select a first row and move to next page the selection remain same , though the row data is different 
 Page1 , i choose the first row 
 
 Page 2 - first row is automatically selected

how do I control the selection in pagination , 
 local!listPagingInfo: a!pagingInfo(startIndex: 1, batchSize: 20), local!pagedList: rule!getData(Id: local!search,pagingInfo: local!listPagingInfo) 
 a!gridLayout( 
 labelPosition: "ABOVE", totalCount: null, headerCells: {}, columnConfigs: {}, rows: { }, 
 selectionValue: local!selectedIndex, selectionSaveInto: { a!save( local!selectedIndex, a!flatten(save!value) ), a!save( ri!selecteditems, if( a!isNullOrEmpty(local!selectedIndex), {}, index( local!pagedList, local!selectedIndex ) ) ) 
 }, /*selectionRequired: true,*/ selectable: true, selectionStyle: "CHECKBOX", validations: {}, shadeAlternateRows: true, borderStyle: "STANDARD", rowHeader: 1 ),

Mike Schmitt · Answer

This is because you're selecting the row by index (its position in the current page's worth of data) as opposed to by its unique ID. To fix this you'll need to rework how your selection is handled. 
 Also:

Mike Schmitt · Answer

I would just point you to the documentation pages for the editable grid. I would suggest using the "id" functionality inside a!gridRowLayout(), and point it to a primary key instead of using the row's position. Alas, I don't usually go through the painful process of manually building paging for editable grids, so my specific advice stops there. But you seem to know how to manually manage saveInto parameters and so-forth, so I would warrant it won't be too difficult for you to rework.

Nandhini.Kumaran · Answer

We can refer primary key instead of fv!index for grid selection. Adding sample code for your reference. Here id is my primary key