Pass initial value to a modelform in django

Question

How can I pass an initial value for a field to a model form. I have something like the following code

class ScreeningForm(forms.ModelForm):
    class Meta:
        model = Screening

    def __init__(self, *args, **kwargs):
        super(ScreeningForm, self).__init__(*args, **kwargs)
        self.fields['blood_screen_type'] =  CommaSeparatedCharField(
            label=self.fields['blood_screen_type'].label,
            initial=self.fields['blood_screen_type'].initial,
            required=False,
            widget=CommaSeparatedSelectMultiple(choices=BLOOD_SCREEN_TYPE_CHOICES)
        )

class ScreeningAdmin(admin.ModelAdmin):
    #form = ScreeningForm
    form = ScreeningForm(initial={'log_user':get_current_user()})

Now I want to pass an initial value for a field of the Person class. How can I do that?

Answer 1

You can pass initial value to a ModelForm like this:

form = PersonForm(initial={'fieldname': value})

For example, if you wanted to set initial age to 24 and name to "John Doe":

form = PersonForm(initial={'age': 24, 'name': 'John Doe'})

Update

I think this addresses your actual question:

def my_form_factory(user_object):
    class PersonForm(forms.ModelForm):
        # however you define your form field, you can pass the initial here
        log_user = models.ChoiceField(choices=SOME_CHOICES, initial=user_object)
        ...
    return PersonForm

class PersonAdmin(admin.ModelAdmin):
    form = my_form_factory(get_current_user())