django csv file validation in model form clean method

Following is the FileModel to upload a csv file in my Django application:

class File(models.Model):
  uploaded_by = models.ForeignKey(
  csv_file = models.FileField(

On invocation of the /upload_file url pattern, the upload_csv_file view executes as follows:

 def upload_csv_file(request):
   if request.method == 'POST':
      csv_form = CSVForm(request.POST, request.FILES)
      if csv_form.is_valid():
        file_uploaded =
        file_uploaded.uploaded_by = request.user
        return HttpResponse("<h1>Your csv file was uploaded</h1>")

elif request.method == ‘GET’:
csv_form = CSVForm()
return render(request, ‘./mysite/upload_file.html’, {‘csv_form’: csv_form})

In I am validating the following:

  • file extension (.csv)
  • file size (5 mb)
class CSVForm(forms.ModelForm):

class Meta:
model = File
fields = (‘csv_file’,)

def clean_csv_file(self):
uploaded_csv_file = self.cleaned_data[‘csv_file’]

if uploaded_csv_file:
filename =
if filename.endswith(settings.FILE_UPLOAD_TYPE):
if uploaded_csv_file.size < int(settings.MAX_UPLOAD_SIZE):
return True
raise forms.ValidationError(
“File size must not exceed 5 MB”)
raise forms.ValidationError(“Please upload .csv extension files only”)

return uploaded_csv_file

def clean(self):
cleaned_data = super(CSVForm, self).clean()
uploaded_csv_file = cleaned_data.get(‘csv_file’)
return uploaded_csv_file

However i encounter the following error on submitting the file upload button:

  Attribute error: ‘bool’ object has no attribute ‘get’

I am unsure whether the ‘def clean_csv_file(self)’ is being invoked or not.

There are ways to validate file extension and size within the function-based view, but I would like to validate the file attributes in the ModelForm’s clean() method itself.

Please suggest a solution to apply the same. Thanks!


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