<p>我已经将<code>NEW_MESSAGE_ON_PROJECT</code>和<code>NEW_MESSAGE_ON_PROPOSAL</code>移动到了<code>BaseNotification</code>,超类</p>
<pre><code>class CustomerNotification(BaseNotification):
NEW_PROPOSAL = 1000
# NEW_MESSAGE_ON_PROJECT = 1001
# NEW_MESSAGE_ON_PROPOSAL = 1002
CHOICES = ((NEW_PROPOSAL, "New Prpposal"),
(NEW_MESSAGE_ON_PROJECT, "New Message on Project"),
(NEW_MESSAGE_ON_PROPOSAL,"New Message on Proposal"))
</code></pre>
<p>当我设定选择时,我得到</p>
<pre><code>NameError: name 'NEW_MESSAGE_ON_PROJECT' is not defined
</code></pre>
<p>我不明白这里的上下文。那么解决办法是什么呢</p>