record should endwith .

models/record.go

@@ -2,6 +2,7 @@ package models
 
 import (
 	"fmt"
+	"strings"
 
 	dns "github.com/cloud66-oss/coredns_mysql"
 )
@@ -31,6 +32,13 @@ func (Record) TableName() string {
 	return "coredns_record"
 }
 
+func (r *Record) CheckZone() error {
+	if strings.HasSuffix(r.Zone, ".") {
+		return fmt.Errorf("zone should end with '.'")
+	}
+	return nil
+}
+
 type RecordContentTypes interface {
 	dns.ARecord | dns.AAAARecord | dns.CNAMERecord | dns.CAARecord | dns.NSRecord | dns.MXRecord | dns.SOARecord | dns.SRVRecord | dns.TXTRecord
 }