upgrading to go 1.18 for generics (and lodash-like library).

devices with an empty wwn should be filtered out (not uploaded during device registration, skipped when attempting to upload metrics).
added a migration to delete existing device entries with an empty `wwn`

fixes #314

webapp/backend/pkg/database/scrutiny_repository_migrations.go

@@ -267,6 +267,14 @@ func (sr *scrutinyRepository) Migrate(ctx context.Context) error {
 				return tx.AutoMigrate(m20220509170100.Device{})
 			},
 		},
+		{
+			ID: "m20220709181300",
+			Migrate: func(tx *gorm.DB) error {
+
+				// delete devices with empty `wwn` field (they are impossible to delete manually), and are invalid.
+				return tx.Where("wwn = ?", "").Delete(&models.Device{}).Error
+			},
+		},
 	})
 
 	if err := m.Migrate(); err != nil {

webapp/backend/pkg/web/handler/register_devices.go

@@ -4,6 +4,7 @@ import (
 	"github.com/analogj/scrutiny/webapp/backend/pkg/database"
 	"github.com/analogj/scrutiny/webapp/backend/pkg/models"
 	"github.com/gin-gonic/gin"
+	"github.com/samber/lo"
 	"github.com/sirupsen/logrus"
 	"net/http"
 )
@@ -22,8 +23,13 @@ func RegisterDevices(c *gin.Context) {
 		return
 	}
 
+	//filter any device with empty wwn (they are invalid)
+	detectedStorageDevices := lo.Filter[models.Device](collectorDeviceWrapper.Data, func(dev models.Device, _ int) bool {
+		return len(dev.WWN) > 0
+	})
+
 	errs := []error{}
-	for _, dev := range collectorDeviceWrapper.Data {
+	for _, dev := range detectedStorageDevices {
 		//insert devices into DB (and update specified columns if device is already registered)
 		// update device fields that may change: (DeviceType, HostID)
 		if err := deviceRepo.RegisterDevice(c, dev); err != nil {
@@ -40,7 +46,7 @@ func RegisterDevices(c *gin.Context) {
 	} else {
 		c.JSON(http.StatusOK, models.DeviceWrapper{
 			Success: true,
-			Data:    collectorDeviceWrapper.Data,
+			Data:    detectedStorageDevices,
 		})
 		return
 	}

webapp/backend/pkg/web/handler/upload_device_metrics.go

@@ -20,6 +20,10 @@ func UploadDeviceMetrics(c *gin.Context) {
 
 	//appConfig := c.MustGet("CONFIG").(config.Interface)
 
+	if c.Param("wwn") == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"success": false})
+	}
+
 	var collectorSmartData collector.SmartInfo
 	err := c.BindJSON(&collectorSmartData)
 	if err != nil {