ModelChoiceField , removing the blank choice

Question

I want to get rid of the "-------------" choice Django adds in a select input representing a Foreign Key on a ModelForm

It's been answered that you can use the empty_label=none option, but I have a ModelForm, not a regular form and overriding the field is not allowed.

I know that I can override the __init__() method of the ModelForm in order to modify a ModelChoiceField's queryset using

self.fields['my_foreign_key'].queryset = .... 

But this would be really ugly, as this happens over +10 foreign_keys on the "Main" model, and there's more than a Modelform based on this model

The whole context :

• each one of these foreign_key points to the same kind of models : they are particular lists of choices, many models to ease their modification via the admin.
• all these models are related to the Main model via a "to_field=code" relation, based on a Charfield which contains a three-letter code (hey, not my fault, I had to use a legacy MS Access DB), this CharField has the blank=True, unique=True options, so I could, for each list, create a "---No information yet---" record which has, you bet, a blank value instead of a three letter code...

The situation is now : I get a select input field with two "blank value" choices : the django one and mine, one after the other. I just miss a 'empty_label=none` option here too...

Answer 1

If you want to remove the blank choice for all ModelChoiceField you could do something like..

class Form(forms.ModelForm):     class Meta:         model = MyModel      def __init__(self, *args, **kwargs):         super(Form, self).__init__(*args, **kwargs)         modelchoicefields = [field for field_name, field in self.fields.iteritems() if             isinstance(field, forms.ModelChoiceField)]          for field in modelchoicefield:             field.empty_label = None 

But that would replace all ModelChoiceFields, so maybe something more fine grained like:

for fieldname in ('field1','field2','field3','field4','field5','field6'):     self.fields[fieldname].empty_label = None 

Certainly easier than the __init__ overwrite you mentioned!

Update from Moritz

You can use 2017+ use:

forms.ModelChoiceField(... empty_label=None