Provisioning: Add validation for missing organisations in datasource, dashboard, and notifier configurations (#26601)

* Provisioning: Check that org. from config exists

Signed-off-by: m.nabokikh <maksim.nabokikh@flant.com>

* Apply suggestions from code review

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

* Fix some code after applying suggestions

Signed-off-by: m.nabokikh <maksim.nabokikh@flant.com>

* Add negative test case

Signed-off-by: m.nabokikh <maksim.nabokikh@flant.com>

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

pkg/services/provisioning/utils/utils.go

@@ -0,0 +1,20 @@
+package utils
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/grafana/grafana/pkg/bus"
+	"github.com/grafana/grafana/pkg/models"
+)
+
+func CheckOrgExists(orgID int64) error {
+	query := models.GetOrgByIdQuery{Id: orgID}
+	if err := bus.Dispatch(&query); err != nil {
+		if errors.Is(err, models.ErrOrgNotFound) {
+			return err
+		}
+		return fmt.Errorf("failed to check whether org. with the given ID exists: %w", err)
+	}
+	return nil
+}

pkg/services/provisioning/utils/utils_test.go

@@ -0,0 +1,29 @@
+package utils
+
+import (
+	"testing"
+
+	"github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/services/sqlstore"
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestCheckOrgExists(t *testing.T) {
+	Convey("with default org in database", t, func() {
+		sqlstore.InitTestDB(t)
+
+		defaultOrg := models.CreateOrgCommand{Name: "Main Org."}
+		err := sqlstore.CreateOrg(&defaultOrg)
+		So(err, ShouldBeNil)
+
+		Convey("default org exists", func() {
+			err := CheckOrgExists(defaultOrg.Result.Id)
+			So(err, ShouldBeNil)
+		})
+
+		Convey("other org doesn't exist", func() {
+			err := CheckOrgExists(defaultOrg.Result.Id + 1)
+			So(err, ShouldEqual, models.ErrOrgNotFound)
+		})
+	})
+}