django - add extra field to ModelForm -

i adding field django modelform that:

class form(forms.modelform):     extra_field = forms.charfield(label='name of institution')     class meta:         model = db_institutioninstitution         fields = ['conn_kind','time','inst_name2'] 

the form working fine, cant prepopulate it. use in modelformset_factory:

formset = modelformset_factory(db_institutioninstitution,form=form) 

i manually run through queryset , add entry in dictionary needed additional form in formset. however, when call:

formset1 = formset(prefix='brch',queryset=qs1) 

the extra_field not prepopulated intended (the rest working fine).

can help?

if want set default.

extra_field = forms.charfield(label='name of institution', default="harvard") 

if want dynamically set value:

def __init__(self, *args, **kwargs):      super(form,self).__init(*args, **kwargs)     self.fields['extra_field'].initial = "harvard"