What are some examples of using ModelFormSets in Django?

What are some examples of using ModelFormSets in Django?

ModelFormSets in Django allow you to manage multiple forms on a single page. For example, you can create a formset for a list of items, like products in a shopping cart.

Can you show me a code example of a ModelFormSet?

Sure! Here's a simple example:

from django.forms import modelformset_factory
from .models import Product

ProductFormSet = modelformset_factory(Product, fields=('name', 'price'), extra=3)

This creates a formset for the Product model with three extra empty forms.

How do I handle form submission for a ModelFormSet?

You can handle form submission by checking if the request method is POST, then binding the formset to the request data. If valid, save the formset:

if request.method == 'POST':
    formset = ProductFormSet(request.POST)
    if formset.is_valid():
        formset.save()

What if I want to customize the formset behavior?

You can customize the formset by subclassing BaseModelFormSet and overriding methods like save() or add_fields() to change how forms are processed.