[ML] Fix color coding for outlier detection. Fix nested fields for da…

…ta gird. (#80467) (#80493)

- Fix for color coding for outlier detection due to updated feature influence format.
- Fix for displaying cell values for nested fields.

x-pack/plugins/ml/public/application/components/data_grid/common.ts

@@ -208,14 +208,24 @@ export const useRenderCellValue = (
           return results[cId.replace(`${resultsField}.`, '')];
         }
 
-        return tableItems.hasOwnProperty(adjustedRowIndex)
-          ? getNestedProperty(tableItems[adjustedRowIndex], cId, null)
-          : null;
+        if (tableItems.hasOwnProperty(adjustedRowIndex)) {
+          const item = tableItems[adjustedRowIndex];
+
+          // Try if the field name is available as is.
+          if (item.hasOwnProperty(cId)) {
+            return item[cId];
+          }
+
+          // Try if the field name is available as a nested field.
+          return getNestedProperty(tableItems[adjustedRowIndex], cId, null);
+        }
+
+        return null;
       }
 
       const cellValue = getCellValue(columnId);
 
-      // React by default doesn't all us to use a hook in a callback.
+      // React by default doesn't allow us to use a hook in a callback.
       // However, this one will be passed on to EuiDataGrid and its docs
       // recommend wrapping `setCellProps` in a `useEffect()` hook
       // so we're ignoring the linting rule here.

x-pack/plugins/ml/public/application/data_frame_analytics/pages/analytics_exploration/components/outlier_exploration/common.ts

@@ -17,7 +17,14 @@ export const getFeatureCount = (resultsField: string, tableItems: DataGridItem[]
     return 0;
   }
 
-  return Object.keys(tableItems[0]).filter((key) =>
-    key.includes(`${resultsField}.${FEATURE_INFLUENCE}.`)
-  ).length;
+  const fullItem = tableItems[0];
+
+  if (
+    fullItem[resultsField] !== undefined &&
+    Array.isArray(fullItem[resultsField][FEATURE_INFLUENCE])
+  ) {
+    return fullItem[resultsField][FEATURE_INFLUENCE].length;
+  }
+
+  return 0;
 };