fix(table-core): assign unassign parentId in grouped row model (#5657)

* fix(getGroupedRowModel): assign parentId & unassign on ungroup (including depth = 0 on ungroup)

* assign parent id before flattening rows

* simplify ungrouping

* remove nx token again

* don't remove nx token again

---------

Co-authored-by: Kevin Van Cott <kevinvandy656@gmail.com>

Author: PiR1

packages/table-core/src/utils/getGroupedRowModel.ts

@@ -1,6 +1,7 @@
 import { createRow } from '../core/row'
-import { Table, Row, RowModel, RowData } from '../types'
+import { Row, RowData, RowModel, Table } from '../types'
 import { flattenBy, getMemoOptions, memo } from '../utils'
+import { GroupingState } from '../features/ColumnGrouping'
 
 export function getGroupedRowModel<TData extends RowData>(): (
   table: Table<TData>
@@ -10,6 +11,10 @@ export function getGroupedRowModel<TData extends RowData>(): (
       () => [table.getState().grouping, table.getPreGroupedRowModel()],
       (grouping, rowModel) => {
         if (!rowModel.rows.length || !grouping.length) {
+          rowModel.rows.forEach(row => {
+            row.depth = 0
+            row.parentId = undefined
+          })
           return rowModel
         }
 
@@ -53,7 +58,7 @@ export function getGroupedRowModel<TData extends RowData>(): (
           // Group the rows together for this level
           const rowGroupsMap = groupBy(rows, columnId)
 
-          // Peform aggregations for each group
+          // Perform aggregations for each group
           const aggregatedGroupedRows = Array.from(rowGroupsMap.entries()).map(
             ([groupingValue, groupedRows], index) => {
               let id = `${columnId}:${groupingValue}`
@@ -62,6 +67,10 @@ export function getGroupedRowModel<TData extends RowData>(): (
               // First, Recurse to group sub rows before aggregation
               const subRows = groupUpRecursively(groupedRows, depth + 1, id)
 
+              subRows.forEach(subRow => {
+                subRow.parentId = id
+              })
+
               // Flatten the leaf rows of the rows in this group
               const leafRows = depth
                 ? flattenBy(groupedRows, row => row.subRows)