擅长:python、mysql、java
<p>使用模型管理器始终注释<code>AwardHolders</code></p>
<pre><code>class AwardHolderQuerySet(models.QuerySet):
def all(self):
return self.annotate(Count('award__units_awarded'))
class AwardHolder(models.Model):
name = models.CharField()
objects = AwardHolderQuerySet.as_manager()
...
</code></pre>