Fix path_order => serial_number

rog/models.py

@@ -914,11 +914,6 @@ class Checkpoint(models.Model):
 
 class GpsCheckin(models.Model):
     id = models.AutoField(primary_key=True)  # 明示的にidフィールドを追加
-    path_order = models.IntegerField(
-        null=False,
-        default=0,
-        help_text="チェックポイントの順序番号"
-    )
     zekken = models.CharField(
         max_length=20,
         null=True,
@@ -1087,13 +1082,13 @@ class GpsCheckin(models.Model):
     class Meta:
         db_table = 'rog_gpscheckin'  # 実際のテーブル名に合わせて修正
         indexes = [
-            models.Index(fields=['zekken', 'event_code', 'path_order'], name='idx_zekken_event'),
+            models.Index(fields=['zekken', 'event_code', 'serial_number'], name='idx_zekken_event'),
             models.Index(fields=['create_at'], name='idx_create_at'),
         ]
 
 
     def __str__(self):
-        return f"{self.event_code}-{self.zekken_number}-{self.path_order}-buy:{self.buy_flag}-valid:{self.validate_location}-point:{self.points}"
+        return f"{self.event_code}-{self.zekken_number}-{self.serial_number}-buy:{self.buy_flag}-valid:{self.validate_location}-point:{self.points}"
 
     def save(self, *args, **kwargs):
         # 作成時・更新時のタイムスタンプを自動設定