refactor: ignore redis is nil

etc/template/email.tpl

@@ -200,13 +200,6 @@
                         {{timestamp}}
                     </td>
                 </tr>
-
-                <tr>
-                    <th>PromQL：</th>
-                    <td>
-                        {{.PromQl}}
-                    </td>
-                </tr>
                 </tbody>
             </table>
 

storage/redis.go

@@ -2,6 +2,7 @@ package storage
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"os"
 	"strings"
@@ -123,6 +124,10 @@ func MGet(ctx context.Context, r Redis, keys []string) [][]byte {
 
 	for i, key := range keys {
 		cmd := cmds[i]
+		if errors.Is(cmd.Err(), redis.Nil) {
+			continue
+		}
+
 		if cmd.Err() != nil {
 			logger.Errorf("failed to get key: %s, err: %s", key, cmd.Err())
 			continue