Ensure member name is not overriden by original record fields when copying properties.

Author: MKirova

projects/igniteui-angular/src/lib/grids/pivot-grid/pivot-util.ts

@@ -317,7 +317,10 @@ export class PivotUtil {
                 for (const nested of nestedData) {
                     if (nested[pivotKeys.records] && nested[pivotKeys.records].length === 1) {
                         // only 1 child record, apply same props to parent.
-                        PivotUtil.processSiblingProperties(nested[pivotKeys.records][0], [nested], pivotKeys);
+                        const keys = Object.assign({}, pivotKeys) as any;
+                        const memberName = h[pivotKeys.children].entries().next().value[1].dimension.memberName;
+                        keys[memberName] = nested[memberName];
+                        PivotUtil.processSiblingProperties(nested[pivotKeys.records][0], [nested], keys);
                     }
                 }
                 obj[pivotKeys.records] = this.getDirectLeafs(nestedData, pivotKeys);

src/app/pivot-grid-hierarchy/pivot-grid-hierarchy.sample.html

@@ -1,5 +1,6 @@
 <igx-pivot-grid
     #grid1
+    [defaultExpandState]='true'
     [data]="origData"
     [pivotConfiguration]="pivotConfigHierarchy">
 </igx-pivot-grid>

src/app/pivot-grid-hierarchy/pivot-grid-hierarchy.sample.ts

@@ -26,28 +26,30 @@ export class PivotGridHierarchySampleComponent {
             }
         },
         ],
-        rows: [{
-            memberName: 'AllSeller',
-            memberFunction: () => 'All Seller',
-            enabled: true,
-            childLevel:
+        rows: [
             {
                 memberName: 'Seller',
                 memberFunction: (data) => data.Seller.Name,
                 enabled: true,
-            }
-        },
-        {
-            memberName: 'AllCity',
-            memberFunction: () => 'All City',
-            enabled: true,
-            childLevel:
+            },
+            {
+                memberName: 'All',
+                memberFunction: () => 'All',
+                enabled: true,
+                childLevel:
+                {
+
+                    memberName: 'Product',
+                    memberFunction: (data) => data.Product.Name,
+                    enabled: true
+
+                }
+            },
             {
                 memberName: 'City',
                 memberFunction: (data) => data.Seller.City,
                 enabled: true,
             }
-        }
         ],
         values: [
             {