我有一些具有一些 ForeignKey 关系的模型。
通过 forms.py 我添加了一个ModelMultipleChoiceField小部件
class VariableFieldForm(ModelForm):
custom_field = forms.ModelMultipleChoiceField(queryset=VariableField.objects.all(), widget=FilteredSelectMultiple("Custom Fields", is_stacked=False))
class Meta:
model = VariableField
并且在尝试访问已保存的记录localhost:8000/admin/product/subcategory/3/或保存新记录时，我得到以下回溯
File "/opt/python2.6/lib/python2.6/site-packages/django/utils/encoding.py" in force_unicode
71. s = unicode(s)
File "/opt/python2.6/lib/python2.6/site-packages/django/forms/forms.py" in __unicode__
408. return self.as_widget()
File "/opt/python2.6/lib/python2.6/site-packages/django/forms/forms.py" in as_widget
439. return widget.render(name, self.value(), attrs=attrs)
File "/opt/python2.6/lib/python2.6/site-packages/django/contrib/admin/widgets.py" in render
39. output = [super(FilteredSelectMultiple, self).render(name, value, attrs, choices)]
File "/opt/python2.6/lib/python2.6/site-packages/django/forms/widgets.py" in render
581. options = self.render_options(choices, value)
File "/opt/python2.6/lib/python2.6/site-packages/django/forms/widgets.py" in render_options
531. selected_choices = set([force_unicode(v) for v in selected_choices])
Exception Type: TemplateSyntaxError at /admin/product/subcategory/3/
Exception Value: Caught TypeError while rendering: 'long' object is not iterable
我正在使用 Django 1.3 和 MySQL
关于如何解决它的想法？