Django标记:"已注册"例外

Question

我安装了Django标记.我阅读了教程和反汇编,它是如何工作的.在我的模特中:

import tagging

class TaggingWidget(models.Model):
    """Widget for tagging."""
    name = models.CharField(max_length = 50)


tagging.register(TaggingWidget)

当我尝试将小部件导入shell时,我有一个例外:

In [1]: from soapapp import models
---------------------------------------------------------------------------
AlreadyRegistered                         Traceback (most recent call last)

    /home/user/workspace/soapbox/<ipython console> in <module>()

    /home/user/workspace/soapbox/soapapp/models.py in <module>()
      8 
      9 
---> 10 tagging.register(TaggingWidget)
     11 
     12 

    /home/user/Envs/env1/lib/python2.6/site-packages/tagging/__init__.pyc in register(model,       tag_descriptor_attr, tagged_item_manager_attr)
     37     if model in registry:
     38         raise AlreadyRegistered("The model '%s' has already been "
---> 39             "registered." % model._meta.object_name)
     40     if hasattr(model, tag_descriptor_attr):
     41         raise AttributeError("'%s' already has an attribute '%s'. You must "

AlreadyRegistered: The model 'TaggingWidget' has already been registered.

怎么了？我该怎么办？

Answer 1

似乎是django-tagging的一个悬而未决的问题.一个简单的解决方法是

try:
    tagging.register(TaggingWidget)
except tagging.AlreadyRegistered:
    pass