django formwizard NoFileStorageConfigured

[danoro]

[ACTION]

Subclass NamedUrlSessionWizardView and instantiate it with a set of
forms one of them containing a FileField

class CommonWizardView(NamedUrlSessionWizardView):
pass

class FamilyWizardView(CommonWizardView):
pass

[RESULT]

File "/accounts/urls.py", line 66, in <module>

family_wizard = FamilyWizardView.as_view(named_family_forms,
url_name='family_step', done_step_name='family_wizard')

File "python2.7/site-packages/django_formwizard-1.0-py2.7.egg/
formwizard/views.py", line 109, in as_view

initkwargs = cls.get_initkwargs(*args, **kwargs)

File "python2.7/site-packages/django_formwizard-1.0-py2.7.egg/
formwizard/views.py", line 583, in get_initkwargs

initkwargs = super(NamedUrlWizardView, cls).get_initkwargs(*args,
**kwargs)

File "python2.7/site-packages/django_formwizard-1.0-py2.7.egg/
formwizard/views.py", line 166, in get_initkwargs

raise NoFileStorageConfigured


TemplateSyntaxError: Caught NoFileStorageConfigured while rendering

[CAUSE]

class WizardView(TemplateView):
@classmethod
def get_initkwargs(cls, form_list, initial_dict=None,
instance_dict=None, condition_dict=None, *args, **kwargs):
"""
Creates a dict with all needed parameters for the form wizard
instances.
"""
....
# check if any form contains a FileField, if yes, we need
a
# file_storage added to the wizardview (by subclassing).
for field in form.base_fields.itervalues():
if (isinstance(field, forms.FileField) and
not hasattr(cls, 'file_storage')):
raise NoFileStorageConfigured

[RESOLUTION]

subclassing is not enough. I inherited from both
NamedUrlSessionWizardView and FileSystemStorage, as shown below, but I
keep getting this error.

class FamilyWizardView(CommonWizardView, FileSystemStorage):
pass

I noticed an instance variable in formwizard called storage_name but
it is used for child clasess Session and Cookie WizardViews. Si it's
no relevant

please, could you shed some light ?

[Kenneth Love]

I've just been hit by this too, exactly the same set up and problem. I'd love a fix/solution.

[Russell Keith-Magee]

Have either of you done a search of Trac to see if this issue has been reported previously? If there isn't, could you please open a ticket so that the problem isn't forgotten.

Yours,

Russ Magee %-)

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[Adonis Nafeh]

I ran into the same error. Using files in formwizard requires configuring File Storage, according to docs https://docs.djangoproject.com/en/dev/ref/contrib/formtools/form-wizard/#handling-files

initializing file_storage fixed it for me.  

from django.core.files.storage import FileSystemStorage

class AppWizard(SessionWizardView):
    file_storage = FileSystemStorage(location=os.path.join(settings.MEDIA_ROOT))