What are some examples of using formsets in Django?

What are some examples of using formsets in Django?

Django formsets allow you to manage multiple forms on a single page. For example, you can create a formset for a blog where users can add multiple comments at once.

Can you show me a code example of a formset in Django?

Sure! Here's a simple example:

from django import forms
from django.forms import formset_factory

class CommentForm(forms.Form):
    name = forms.CharField(max_length=100)
    comment = forms.CharField(widget=forms.Textarea)

CommentFormSet = formset_factory(CommentForm)

This creates a formset for comments where users can fill in their name and comment.

How do I render this formset in a template?

You can render the formset in your template like this:

<form method="post">
    {% csrf_token %}
    {{ formset.management_form }}
    {% for form in formset.forms %}
        {{ form.as_p }}
    {% endfor %}
    <button type="submit">Submit</button>
</form>

What if I want to add validation to the formset?

You can override the is_valid() method in your formset class to add custom validation logic. For example, you can check if any comment is empty and raise a validation error.