Haven't tested this, but based on reading Django's code here and here I believe it should work:
class ThingForm(models.ModelForm):
class Meta:
model = Thing
def __init__(self, *args, **kwargs):
super(ThingForm, self).__init__(*args, **kwargs)
self.fields['verb'].empty_label = None
EDIT: This is documented, though you wouldn't necessarily know to look for ModelChoiceField if you're working with an auto-generated ModelForm.
EDIT: As jlpp notes in his answer, this isn't complete - you have to re-assign the choices to the widgets after changing the empty_label attribute. Since that's a bit hacky, the other option that might be easier to understand is just overriding the entire ModelChoiceField:
class ThingForm(models.ModelForm):
verb = ModelChoiceField(Verb.objects.all(), empty_label=None)
class Meta:
model = Thing
from the docs
The blank choice will not be included if the model field has blank=False and an explicit default value (the default value will be initially selected instead).
so set the default and you're ok
With Carl's answer as a guide and after rooting around the Django source for a couple hours I think this is the complete solution:
To remove the empty option (extending Carl's example):
class ThingForm(models.ModelForm):
class Meta:
model = Thing
def __init__(self, *args, **kwargs):
super(ThingForm, self).__init__(*args, **kwargs)
self.fields['verb'].empty_label = None
# following line needed to refresh widget copy of choice list
self.fields['verb'].widget.choices =
self.fields['verb'].choices
To customize the empty option label is essentially the same:
class ThingForm(models.ModelForm):
class Meta:
model = Thing
def __init__(self, *args, **kwargs):
super(ThingForm, self).__init__(*args, **kwargs)
self.fields['verb'].empty_label = "Select a Verb"
# following line needed to refresh widget copy of choice list
self.fields['verb'].widget.choices =
self.fields['verb'].choices
I think this approach applies to all scenarios where ModelChoiceFields are rendered as HTML but I'm not positive. I found that when these fields are initialized, their choices are passed to the Select widget (see django.forms.fields.ChoiceField._set_choices). Setting the empty_label after initialization does not refresh the Select widget's list of choices. I'm not familiar enough with Django to know if this should be considered a bug.
You can use this on your model:
class MyModel(models.Model):
name = CharField('fieldname', max_length=10, default=None)
default=None is the answer :D
NOTE: I tried this on Django 1.7
As for the django 1.4 all you need is to set the "default" value and "blank=False" on the choices field
class MyModel(models.Model):
CHOICES = (
(0, 'A'),
(1, 'B'),
)
choice_field = models.IntegerField(choices=CHOICES, blank=False, default=0)
you can do this in admin:
formfield_overrides = {
models.ForeignKey: {'empty_label': None},
}
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