with selectable fields

apps/correlations/kinds/correlations.cue

@@ -13,6 +13,9 @@ correlationsv0alpha1: {
 			type:        CorrelationType
 		}
 	}
+	selectableFields: [
+		"spec.datasource.name"
+	]
 }
 
 DataSourceRef: {

apps/correlations/pkg/apis/correlation/v0alpha1/correlation_schema_gen.go

@@ -5,13 +5,25 @@
 package v0alpha1
 
 import (
+	"fmt"
+
 	"github.com/grafana/grafana-app-sdk/resource"
 )
 
 // schema is unexported to prevent accidental overwrites
 var (
 	schemaCorrelation = resource.NewSimpleSchema("correlations.grafana.app", "v0alpha1", &Correlation{}, &CorrelationList{}, resource.WithKind("Correlation"),
-		resource.WithPlural("correlations"), resource.WithScope(resource.NamespacedScope))
+		resource.WithPlural("correlations"), resource.WithScope(resource.NamespacedScope), resource.WithSelectableFields([]resource.SelectableField{{
+			FieldSelector: "spec.datasource.name",
+			FieldValueFunc: func(o resource.Object) (string, error) {
+				cast, ok := o.(*Correlation)
+				if !ok {
+					return "", fmt.Errorf("provided object must be of type *Correlation")
+				}
+				return cast.Spec.Datasource.Name, nil
+			},
+		},
+		}))
 	kindCorrelation = resource.Kind{
 		Schema: schemaCorrelation,
 		Codecs: map[resource.KindEncoding]resource.Codec{

apps/correlations/pkg/apis/correlation_manifest.go

@@ -39,6 +39,9 @@ var appManifestData = app.ManifestData{
 					Scope:      "Namespaced",
 					Conversion: false,
 					Schema:     &versionSchemaCorrelationv0alpha1,
+					SelectableFields: []string{
+						"spec.datasource.name",
+					},
 				},
 			},
 			Routes: app.ManifestVersionRoutes{

pkg/registry/apps/correlations/legacy_storage.go

@@ -65,12 +65,12 @@ func (s *legacyStorage) List(ctx context.Context, options *internalversion.ListO
 	if options.FieldSelector != nil {
 		for _, r := range options.FieldSelector.Requirements() {
 			switch r.Field {
-			case "spec.datasource":
+			case "spec.datasource.name":
 				switch r.Operator {
 				case selection.Equals, selection.DoubleEquals:
 					uids = []string{r.Value}
 				case selection.In:
-					uids = strings.Split(r.Value, ";")
+					uids = strings.Split(r.Value, ";") // ??? not sure how/if this supports multiple values
 				default:
 					return nil, fmt.Errorf("unsupported operation")
 				}