Dashboards: Fix preload field not being persisted via /v1beta1 (#112475)

apps/dashboard/pkg/migration/frontend_defaults.go

@@ -1061,7 +1061,6 @@ func cleanupDashboardDefaults(dashboard map[string]interface{}) {
 
 	// Remove transient properties that frontend filters out during getSaveModelClone()
 	// These properties are lost during frontend's property copying loop in getSaveModelCloneOld()
-	delete(dashboard, "preload")   // Transient dashboard loading state
 	delete(dashboard, "iteration") // Template variable iteration timestamp
 	delete(dashboard, "nav")       // Removed after V7 migration
 	delete(dashboard, "pulldowns") // Removed after V6 migration - frontend doesn't have this property

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/datasource-testdata/demo1.v42.json

@@ -1293,6 +1293,7 @@
       "type": "timeseries"
     }
   ],
+  "preload": false,
   "refresh": false,
   "schemaVersion": 42,
   "tags": [

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/panel-canvas/canvas-connection-examples.v42.json

@@ -3941,6 +3941,7 @@
       "type": "canvas"
     }
   ],
+  "preload": false,
   "refresh": "",
   "schemaVersion": 42,
   "tags": [

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/panel-table/table_footer.v42.json

@@ -1537,6 +1537,7 @@
       "type": "table"
     }
   ],
+  "preload": false,
   "schemaVersion": 42,
   "tags": [],
   "templating": {

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/panel-table/table_kitchen_sink.v42.json

@@ -1848,6 +1848,7 @@
       "type": "table"
     }
   ],
+  "preload": false,
   "schemaVersion": 42,
   "tags": [],
   "templating": {

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/panel-table/table_markdown.v42.json

@@ -107,6 +107,7 @@
       "type": "table"
     }
   ],
+  "preload": false,
   "schemaVersion": 42,
   "tags": [],
   "templating": {

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/panel-table/table_sparkline_cell.v42.json

@@ -576,6 +576,7 @@
       "type": "table"
     }
   ],
+  "preload": false,
   "refresh": "",
   "schemaVersion": 42,
   "tags": [],

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/panel-table/table_tests_new.v42.json

@@ -982,6 +982,7 @@
       "type": "table"
     }
   ],
+  "preload": false,
   "refresh": "",
   "schemaVersion": 42,
   "tags": [

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/panel-table/table_v12_2_migrations.v42.json

@@ -2172,6 +2172,7 @@
       "type": "table"
     }
   ],
+  "preload": false,
   "schemaVersion": 42,
   "tags": [],
   "templating": {

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/panel-timeline/timeline-thresholds-mappings.v42.json

@@ -1071,6 +1071,7 @@
       "type": "state-timeline"
     }
   ],
+  "preload": false,
   "refresh": "",
   "schemaVersion": 42,
   "tags": [

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/panel-timeseries/timeseries-nulls.v42.json

@@ -3409,6 +3409,7 @@
       "type": "state-timeline"
     }
   ],
+  "preload": false,
   "refresh": false,
   "schemaVersion": 42,
   "tags": [

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/panel-trend/trend_example.v42.json

@@ -196,6 +196,7 @@
       "type": "trend"
     }
   ],
+  "preload": false,
   "refresh": "",
   "schemaVersion": 42,
   "tags": [

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/panel-xychart/xychart-demo.v42.json

@@ -1433,6 +1433,7 @@
       "type": "xychart"
     }
   ],
+  "preload": false,
   "refresh": "",
   "schemaVersion": 42,
   "tags": [

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/scenarios/mostly-blank-dashboard.v42.json

@@ -79,6 +79,7 @@
       "type": "debug"
     }
   ],
+  "preload": false,
   "refresh": "",
   "schemaVersion": 42,
   "tags": [],

apps/dashboard/pkg/migration/testdata/dev-dashboards-output/transforms/regression-analysis.v42.json

@@ -1049,6 +1049,7 @@
       "type": "xychart"
     }
   ],
+  "preload": false,
   "refresh": "",
   "schemaVersion": 42,
   "tags": [

public/app/features/dashboard/state/DashboardModel.ts

@@ -81,6 +81,7 @@ export class DashboardModel implements TimeModel {
   graphTooltip: DashboardCursorSync;
   time: any;
   liveNow?: boolean;
+  preload?: boolean;
   private originalTime: any;
   timepicker: any;
   templating: { list: any[] };
@@ -154,6 +155,7 @@ export class DashboardModel implements TimeModel {
     this.timezone = data.timezone ?? '';
     this.weekStart = data.weekStart ?? '';
     this.editable = data.editable !== false;
+    this.preload = data.preload;
     this.graphTooltip = data.graphTooltip || 0;
     this.time = data.time ?? { from: 'now-6h', to: 'now' };
     this.timepicker = data.timepicker ?? {};