Validate/clean a FileField on a non-model form in Django? -

i'm trying validate filefield extension type. i'm having trouble getting clean method field pickup posted value.

from django.forms.forms import form django.forms.fields import filefield django.forms.util import validationerror  class testform(form):             file = filefield(required=false)      def clean_file(self):         value = self.cleaned_data["file"]         print "clean_file value: %s" % value         return none       @localhost def test_forms(request):     form = testform()         if request.method == "post":         form = testform(request.post)                 if form.is_valid():             print "form valid"     return render_to_response("test/form.html", requestcontext(request, locals())) 

when run code, i'm getting following output:

clean_file value: none form valid 

in other words, clean_file method not able file data. likewise, if returns none, form still valid.

here form html:

<form enctype="multipart/form-data" method="post" action="#">    <input type="file" id="id_file" name="file">    <input type="submit" value="save"> </form> 

i have seen couple snippets solutions problem, cannot them work non-model form. both declare custom field type. when that, same problem; calling super() returns none object.

you're not passing request.files form when instantiate in post.

 form = testform(request.post, request.files) 

see the documentation.

also note you're instantiating form twice on post, unnecessary. move first 1 else clause @ end of function (at same level if request.method == 'post').