javascript - TypeError: must be string or buffer, not instance -

i using django-jsignature in django project. after making post request, form returns "type 'instance'". i'm trying save image, above error.

even better save form data vector image suggested in docs.

my function:

def signature(request):     form = signatureform(request.post or none)     if form.is_valid():         signature = form.cleaned_data.get('signature')         if signature:             # image             signature_picture = draw_signature(signature)             signature_file_path = draw_signature(signature, as_file=true)             open(signature_file_path), 'wb') f:                 f.write(signature_picture) 

(signature_file_path == '/tmp/tmpb71wft.png')

i think docs bit unclear, should using either draw_signature(data, as_file=false) (default) or draw_signature(data, as_file=true), no need both.

passing true value as_file makes package dump image content file, while false makes return pil.image instance.

the raw data still available in signature variable (as json string or list, use vector directly.