Django: ManyToManyField on ModelForm as checkbox widget

By default, Django will use a mutli-select widget for rendering a ManyToManyField on a ModelForm. Switching it out for checkboxes is simple.

from django.db import models
from django.forms.models import ModelForm
from django.forms.widgets import CheckboxSelectMultiple

class Company(models.Model):  
    industries = models.ManyToManyField(Industry, blank=True, null=True)

class CompanyForm(ModelForm):
    
    class Meta:
        model = Company
        fields = ("industries")
             
    def __init__(self, *args, **kwargs):
        
        super(CompanyForm, self).__init__(*args, **kwargs)
        
        self.fields["industries"].widget = CheckboxSelectMultiple()
        self.fields["industries"].queryset = Industry.objects.all()