How to get rid of the bogus choice generated by RadioSelect of Django Form

Question

I am using ModelForm on Django 1.3.

models.py:

class UserProfile(models.Model):
...
gender = models.CharField(max_length=1, blank=True, choices=((\'M         


        

Answer 1

Even without blank=True it shows the extra input. I have created a new Widget:

from itertools import chain
from django.forms import RadioSelect
from django.utils.encoding import force_unicode

class RadioSelectNotNull(RadioSelect):
    def get_renderer(self, name, value, attrs=None, choices=()):
        """Returns an instance of the renderer."""
        if value is None: value = ''
        str_value = force_unicode(value) # Normalize to string.
        final_attrs = self.build_attrs(attrs)
        choices = list(chain(self.choices, choices))
        if choices[0][0] == '':
            choices.pop(0)
        return self.renderer(name, str_value, final_attrs, choices)