Django - Get uploaded file type / mimetype

Question

Is there a way to get the content type of an upload file when overwriting the models save method? I have tried this:

def save(self):     print(self.file.content_type)     super(Media, self).save() 

But it did not work. In this example, self.file is a model.FileField:

file = models.FileField(upload_to='uploads/%m-%Y/') 

Edit: I want to be able to save the content type to the database, so I'll need it before the save is actually complete :)

Answer 1

class MyForm(forms.ModelForm):      def clean_file(self):         file = self.cleaned_data['file']         try:             if file:                 file_type = file.content_type.split('/')[0]                 print file_type                  if len(file.name.split('.')) == 1:                     raise forms.ValidationError(_('File type is not supported'))                  if file_type in settings.TASK_UPLOAD_FILE_TYPES:                     if file._size > settings.TASK_UPLOAD_FILE_MAX_SIZE:                         raise forms.ValidationError(_('Please keep filesize under %s. Current filesize %s') % (filesizeformat(settings.TASK_UPLOAD_FILE_MAX_SIZE), filesizeformat(file._size)))                 else:                     raise forms.ValidationError(_('File type is not supported'))         except:             pass          return file 

settings.py

TASK_UPLOAD_FILE_TYPES = ['pdf', 'vnd.oasis.opendocument.text','vnd.ms-excel','msword','application',] TASK_UPLOAD_FILE_MAX_SIZE = "5242880"