排序

backend/shop/models.py

@@ -30,6 +30,13 @@ class WeChatUser(models.Model):
     created_at = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
     updated_at = models.DateTimeField(auto_now=True, verbose_name="更新时间")
 
+    def save(self, *args, **kwargs):
+        is_new = self.pk is None
+        super().save(*args, **kwargs)
+        if is_new and self.order == 0:
+            WeChatUser.objects.filter(pk=self.pk).update(order=self.pk)
+            self.order = self.pk
+
     def __str__(self):
         return self.nickname or self.openid