Schema v2: Persist only relevant field config when transforming to save model (#104197)

public/app/features/dashboard-scene/serialization/transformSceneToSaveModelSchemaV2.test.ts

@@ -232,7 +232,13 @@ describe('transformSceneToSaveModelSchemaV2', () => {
                 description: 'Test Description',
                 hoverHeader: true,
                 hoverHeaderOffset: 10,
-                fieldConfig: { defaults: {}, overrides: [] },
+                fieldConfig: {
+                  defaults: {
+                    mappings: [],
+                    max: undefined,
+                  },
+                  overrides: [],
+                },
                 displayMode: 'transparent',
                 pluginVersion: '7.0.0',
                 $timeRange: new SceneTimeRange({

public/app/features/dashboard-scene/serialization/transformSceneToSaveModelSchemaV2.ts

@@ -200,7 +200,12 @@ export function vizPanelToSchemaV2(
       min,
       max,
       color,
-    }).filter(([_, value]) => value !== undefined)
+    }).filter(([_, value]) => {
+      if (Array.isArray(value)) {
+        return value.length > 0;
+      }
+      return value !== undefined;
+    })
   );
 
   const vizFieldConfig: FieldConfigSource = {