排序

backend/community/models.py

@@ -139,6 +139,14 @@ class Topic(models.Model):
     is_pinned = models.BooleanField(default=False, verbose_name="置顶")
     created_at = models.DateTimeField(auto_now_add=True, verbose_name="发布时间")
     updated_at = models.DateTimeField(auto_now=True, verbose_name="更新时间")
+    order = models.IntegerField(default=0, verbose_name="排序")
+
+    def save(self, *args, **kwargs):
+        is_new = self.pk is None
+        super().save(*args, **kwargs)
+        if is_new and getattr(self, 'order', 0) == 0:
+            Topic.objects.filter(pk=self.pk).update(order=self.pk)
+            self.order = self.pk
 
     def __str__(self):
         return self.title
@@ -175,7 +183,7 @@ class Topic(models.Model):
     class Meta:
         verbose_name = "论坛帖子"
         verbose_name_plural = "论坛帖子管理"
-        ordering = ['-is_pinned', '-created_at']
+        ordering = ['order', '-is_pinned', '-created_at']
 
 
 class Reply(models.Model):