+ extensions = options.get('ext')
+ max_mb = options.get('max', 20)
+ self.max_upload_size = max_mb * 1024 * 1024
+ self.fields['file'].widget.attrs['data-max'] = max_mb
+ label_extra = ['maks. %s MB' % max_mb]
+ if extensions:
+ label_extra.append('format: %s' % ', '.join(extensions))
+ self.fields['file'].label = label + u' (%s)' % '; '.join(label_extra)