擅长:python、mysql、java
<p>注释,然后过滤注释。
<a href="https://docs.djangoproject.com/en/dev/topics/db/aggregation/" rel="nofollow">https://docs.djangoproject.com/en/dev/topics/db/aggregation/</a></p>
<pre><code>Product.objects.annotate(image_count=Count('images')).filter(image_count__gt=0)
</code></pre>