擅长:python、mysql、java
<p>序列化程序元中提到的所有字段的迭代代码:</p>
<pre><code>def to_representation(self, instance):
data = super().to_representation(instance)
for key, value in data.items():
try:
if not value:
data[key] = ""
except KeyError:
pass
return data
</code></pre>