[Synthetics]Sort monitor list by frequency column (#133713)

x-pack/plugins/synthetics/public/apps/synthetics/components/monitors_page/hooks/use_inline_errors.ts

@@ -90,7 +90,7 @@ export function useInlineErrors({
           },
         },
         collapse: { field: 'config_id' },
-        sort: [{ [sortFieldMap[sortField]]: sortOrder }],
+        sort: sortFieldMap[sortField] ? [{ [sortFieldMap[sortField]]: sortOrder }] : undefined,
       },
     },
     [syntheticsMonitors, lastRefresh, doFetch, sortField, sortOrder],

x-pack/plugins/synthetics/public/apps/synthetics/components/monitors_page/management/monitor_list_table/columns.tsx

@@ -118,6 +118,7 @@ export function getMonitorListColumns({
     {
       align: 'left' as const,
       field: ConfigKey.SCHEDULE,
+      sortable: true,
       name: i18n.translate('xpack.synthetics.management.monitorList.frequency', {
         defaultMessage: 'Frequency',
       }),

x-pack/plugins/synthetics/server/legacy_uptime/lib/saved_objects/synthetics_monitor.ts

@@ -72,6 +72,13 @@ export const syntheticsMonitor: SavedObjectsType = {
       tags: {
         type: 'keyword',
       },
+      schedule: {
+        properties: {
+          number: {
+            type: 'integer',
+          },
+        },
+      },
     },
   },
   management: {

x-pack/plugins/synthetics/server/routes/monitor_cruds/get_monitor.ts

@@ -92,7 +92,7 @@ export const getAllSyntheticsMonitorRoute: UMRestApiRouteFactory = () => ({
       type: syntheticsMonitorType,
       perPage,
       page,
-      sortField,
+      sortField: sortField === 'schedule.keyword' ? 'schedule.number' : sortField,
       sortOrder,
       searchFields: ['name', 'tags.text', 'locations.id.text', 'urls'],
       search: query ? `${query}*` : undefined,