On Fri, Sep 25, 2009 at 9:05 AM, DavidA <[email protected]> wrote:
>
> I'm getting this error when I try to remove an inline model instance
> in the Django admin:
>
> Traceback:
> File "C:\Python25\lib\site-packages\django\core\handlers\base.py"
> in get_response
> 92. response = callback(request, *callback_args,
> **callback_kwargs)
> File "C:\Python25\lib\site-packages\django\contrib\admin\sites.py"
> in root
> 490. return self.model_page(request, *url.split
> ('/', 2))
> File "C:\Python25\lib\site-packages\django\views\decorators
> \cache.py" in _wrapped_view_func
> 44. response = view_func(request, *args, **kwargs)
> File "C:\Python25\lib\site-packages\django\contrib\admin\sites.py"
> in model_page
> 509. return admin_obj(request, rest_of_url)
> File "C:\Python25\lib\site-packages\django\contrib\admin
> \options.py" in __call__
> 1098. return self.change_view(request, unquote(url))
> File "C:\Python25\lib\site-packages\django\db\transaction.py" in
> _commit_on_success
> 240. res = func(*args, **kw)
> File "C:\Python25\lib\site-packages\django\contrib\admin
> \options.py" in change_view
> 835. change_message =
> self.construct_change_message(request, form, formsets)
> File "C:\Python25\lib\site-packages\django\contrib\admin
> \options.py" in construct_change_message
> 535. 'object':
> force_unicode(deleted_object)})
> File "C:\Python25\Lib\site-packages\django\utils\encoding.py" in
> force_unicode
> 71. s = unicode(s)
> File "C:\private\src\itweb\..\itweb\controls\models.py" in
> __unicode__
> 160. return self.document.url
>
You don't include this __unicode__ method in the code below, but this is
likely where the problem is. What the admin is trying to log is the unicode
value of your deleted object. I think you need to change your model's
unicode method so that it does not trigger an exception when it is called
for an instance that has no associated file.
Karen
> File "C:\Python25\lib\site-packages\django\db\models\fields
> \files.py" in _get_url
> 68. self._require_file()
> File "C:\Python25\lib\site-packages\django\db\models\fields
> \files.py" in _require_file
> 46. raise ValueError("The '%s' attribute has no file
> associated with it." % self.field.name)
>
> Exception Type: ValueError at /admin/controls/review/24/
> Exception Value: The 'document' attribute has no file associated
> with it.
>
> I can see that the file is being deleted on disk, but then it looks
> like this error is being thrown when the admin is trying to display a
> summary message of what was done, and that triggers a _require_file()
> call which raises an exception.
>
> I have the following models:
>
> class Review(models.Model):
> name = models.CharField(max_length=80)
> review_type = models.CharField(max_length=20,
> choices=REVIEW_TYPE_CHOICES)
> frequency = models.CharField(max_length=20,
> choices=FREQUENCY_CHOICES,
> null=True, blank=True)
> description = models.TextField(null=True, blank=True)
>
> class Evidence(models.Model):
> review = models.ForeignKey(Review)
> review_time = models.DateTimeField(null=True, blank=True)
> reviewed_by = models.ForeignKey(User, null=True, blank=True)
> document = models.FileField(upload_to='evidence/%Y/%m/%d')
>
> And admin classes:
>
> class EvidenceInline(admin.TabularInline):
> model = Evidence
>
> class ReviewAdmin(admin.ModelAdmin):
> list_display = ['name', 'review_type', 'frequency',
> 'description']
> list_filter = ['review_type', 'frequency']
> search_fields = ['name', 'description']
> fieldsets = [
> (None, {'fields':['name', 'review_type',
> 'frequency']}),
> ('Details', {'fields':['description']}),
> ]
> inlines = [EvidenceInline]
>
> admin.site.register(Review, ReviewAdmin)
>
> Am I doing something wrong?
>
> Thanks,
> -Dave
>
> >
>
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