correctly using the latest data for table.

webapp/backend/pkg/database/helpers.go

@@ -0,0 +1,12 @@
+package database
+
+import (
+	"github.com/analogj/scrutiny/webapp/backend/pkg/models/measurements"
+	"sort"
+)
+
+func sortSmartMeasurementsDesc(smartResults []measurements.Smart) {
+	sort.SliceStable(smartResults, func(i, j int) bool {
+		return smartResults[i].Date.After(smartResults[j].Date)
+	})
+}

webapp/backend/pkg/database/helpers_test.go

@@ -0,0 +1,30 @@
+package database
+
+import (
+	"github.com/analogj/scrutiny/webapp/backend/pkg/models/measurements"
+	"github.com/stretchr/testify/require"
+	"testing"
+	"time"
+)
+
+func Test_sortSmartMeasurementsDesc_LatestFirst(t *testing.T) {
+	//setup
+	timeNow := time.Now()
+	smartResults := []measurements.Smart{
+		{
+			Date: timeNow.AddDate(0, 0, -2),
+		},
+		{
+			Date: timeNow,
+		},
+		{
+			Date: timeNow.AddDate(0, 0, -1),
+		},
+	}
+
+	//test
+	sortSmartMeasurementsDesc(smartResults)
+
+	//assert
+	require.Equal(t, smartResults[0].Date, timeNow)
+}

webapp/backend/pkg/database/scrutiny_repository_device_smart_attributes.go

@@ -29,6 +29,7 @@ func (sr *scrutinyRepository) SaveSmartAttributes(ctx context.Context, wwn strin
 	return deviceSmartData, sr.saveDatapoint(sr.influxWriteApi, "smart", tags, fields, deviceSmartData.Date, ctx)
 }
 
+// GetSmartAttributeHistory MUST return in sorted order, where newest entries are at the beginning of the list, and oldest are at the end.
 func (sr *scrutinyRepository) GetSmartAttributeHistory(ctx context.Context, wwn string, durationKey string, attributes []string) ([]measurements.Smart, error) {
 	// Get SMartResults from InfluxDB
 
@@ -64,6 +65,9 @@ func (sr *scrutinyRepository) GetSmartAttributeHistory(ctx context.Context, wwn
 		return nil, err
 	}
 
+	//we have to sort the smartResults again, because the `union` command will return multiple 'tables' and only sort the records in each table.
+	sortSmartMeasurementsDesc(smartResults)
+
 	return smartResults, nil
 
 	//if err := device.SquashHistory(); err != nil {

webapp/frontend/src/app/modules/detail/detail.component.ts

@@ -291,7 +291,7 @@ export class DetailComponent implements OnInit, AfterViewInit, OnDestroy {
         if(smart_results.length == 0){
             return smartAttributeDataSource
         }
-        var latest_smart_result = smart_results[smart_results.length -1];
+        var latest_smart_result = smart_results[0];
         let attributes = {}
         if(this.isScsi()) {
             this.smartAttributeTableColumns = ['status', 'name', 'value', 'thresh', 'history'];