python - Grouping CheckboxSelectMultiple Options in Django -

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in django app have following model:

class supercategory(models.model):   name = models.charfield(max_length=100,)   slug = models.slugfield(unique=true,)  class category(models.model):   name            = models.charfield(max_length=100,)   slug            = models.slugfield(unique=true,)   super_category  = models.foreignkey(supercategory)

what i'm trying accomplish in django's admin interface rendering of category using widget checkboxselectmultiple category somehow grouped supercategory, this:

category:

sports: <- item of supercategory
[ ] soccer <- item of category
[ ] baseball <- item of category
[ ] ...

politics: <- item of supercategory
[ ] latin america
[ ] north america
[ ] ...

does have nice suggestion on how this?

many thanks.

after struggle, here got.

first, make modeladmin call modelform: 

class optionadmin(admin.modeladmin):     form = forms.optionform

then, in form, use use custom widget render:

category = forms.modelmultiplechoicefield(queryset=models.category.objects.all(),widget=admincategorybysupercategory)

finally, widget:

class admincategorybysupercategory(forms.checkboxselectmultiple):       def render(self, name, value, attrs=none, choices=()):          if value none: value = []          has_id = attrs , 'id' in attrs          final_attrs = self.build_attrs(attrs, name=name)          output = [u'<ul>']          # normalize strings          str_values = set([force_unicode(v) v in value])          supercategories = models.supercategory.objects.all()          supercategory in supercategories:              output.append(u'<li>%s</li>'%(supercategory.name))              output.append(u'<ul>')              del self.choices              self.choices = []              categories = models.category.objects.filter(super_category=supercategory)              category in categories:                  self.choices.append((category.id,category.name))              i, (option_value, option_label) in enumerate(chain(self.choices, choices)):                  if has_id:                      final_attrs = dict(final_attrs, id='%s_%s' % (attrs['id'], i))                      label_for = u' for="%s"' % final_attrs['id']                  else:                      label_for = ''                  cb = forms.checkboxinput(final_attrs, check_test=lambda value: value in str_values)                  option_value = force_unicode(option_value)                  rendered_cb = cb.render(name, option_value)                  option_label = conditional_escape(force_unicode(option_label))                  output.append(u'<li><label%s>%s %s</label></li>' % (label_for, rendered_cb, option_label))              output.append(u'</ul>')              output.append(u'</li>')          output.append(u'</ul>')          return mark_safe(u'\n'.join(output))

not elegant solution, hey, worked.


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