Alerting: Include rule uid, title, namespace in unique constraint errors (#82011)

* Alerting: Include rule_uid, title, namespace_uid in unique constraint errors

pkg/services/ngalert/models/alert_rule.go

@@ -27,7 +27,7 @@ var (
 	ErrCannotEditNamespace                = errors.New("user does not have permissions to edit the namespace")
 	ErrRuleGroupNamespaceNotFound         = errors.New("rule group not found under this namespace")
 	ErrAlertRuleFailedValidation          = errors.New("invalid alert rule")
-	ErrAlertRuleUniqueConstraintViolation = errors.New("a conflicting alert rule is found: rule title under the same organisation and folder should be unique")
+	ErrAlertRuleUniqueConstraintViolation = errors.New("rule title under the same organisation and folder should be unique")
 	ErrQuotaReached                       = errors.New("quota has been exceeded")
 	// ErrNoDashboard is returned when the alert rule does not have a Dashboard UID
 	// in its annotations or the dashboard does not exist.

pkg/services/ngalert/models/errors.go

@@ -0,0 +1,15 @@
+package models
+
+import (
+	"github.com/grafana/grafana/pkg/util/errutil"
+)
+
+var (
+	errAlertRuleConflictMsg  = "conflicting alert rule found [rule_uid: '{{ .Public.RuleUID }}', title: '{{ .Public.Title }}', namespace_uid: '{{ .Public.NamespaceUID }}']: {{ .Public.Error }}"
+	ErrAlertRuleConflictBase = errutil.Conflict("alerting.alert-rule.conflict").
+					MustTemplate(errAlertRuleConflictMsg, errutil.WithPublic(errAlertRuleConflictMsg))
+)
+
+func ErrAlertRuleConflict(rule AlertRule, underlying error) error {
+	return ErrAlertRuleConflictBase.Build(errutil.TemplateData{Public: map[string]any{"RuleUID": rule.UID, "Title": rule.Title, "NamespaceUID": rule.NamespaceUID, "Error": underlying.Error()}, Error: underlying})
+}