migrate minSpan (#10924)

public/app/features/dashboard/dashboard_migration.ts

@@ -429,6 +429,9 @@ export class DashboardMigrator {
 
       for (let panel of row.panels) {
         panel.span = panel.span || DEFAULT_PANEL_SPAN;
+        if (panel.minSpan) {
+          panel.minSpan = Math.min(GRID_COLUMN_COUNT, GRID_COLUMN_COUNT / 12 * panel.minSpan);
+        }
         const panelWidth = Math.floor(panel.span) * widthFactor;
         const panelHeight = panel.height ? getGridHeight(panel.height) : rowGridHeight;
 

public/app/features/dashboard/specs/dashboard_migration.jest.ts

@@ -363,6 +363,14 @@ describe('DashboardModel', function() {
       expect(dashboard.panels[0].repeat).toBe('server');
       expect(dashboard.panels.length).toBe(2);
     });
+
+    it('minSpan should be twice', function() {
+      model.rows = [createRow({ height: 8 }, [[6]])];
+      model.rows[0].panels[0] = { minSpan: 12 };
+
+      let dashboard = new DashboardModel(model);
+      expect(dashboard.panels[0].minSpan).toBe(24);
+    });
   });
 });