ChoiceField doesn’t display an empty label when using a tuple

I’ve found a solution that works the way I want it to without violating the DRY principle. Not very clean, but it’ll have to do I suppose.

According to the documentation choices don’t have to be a tuple:

Finally, note that choices can be any
iterable object — not necessarily a
list or tuple. This lets you construct
choices dynamically. But if you find
yourself hacking choices to be
dynamic, you’re probably better off
using a proper database table with a
ForeignKey. choices is meant for
static data that doesn’t change much,
if ever.

So the solution I’m going with for the moment is:

COMPETITION_TYPE_CHOICES = [
     (1, 'Olympic Games'),
     (2, 'ISU Championships'),
     (3, 'Grand Prix Series'),
]

COMP_TYPE_CHOICES_AND_EMPTY = [('','All')] + COMPETITION_TYPE_CHOICES

And then:

class CompetitionSearchForm(forms.Form):
    name = forms.CharField(required=False)
    type = forms.ChoiceField(choices=COMP_TYPE_CHOICES_AND_EMPTY, required=False)

The model stays the same as it was.