mizdb-inlines

Django inline formsets with bootstrap for the MIZDB app.

Requires django_bootstrap5.

Formsets will be rendered in a layout with two columns. One column is for the formset form, and the other column is for the delete button of a given formset form.

Installation

Install using pip:

pip install mizdb-inlines

Add to your INSTALLED_APPS in your settings.py:

INSTALLED_APPS = [
    ...,
    "mizdb_inlines",
]

Usage

Add mizdb_inlines/js/mizdb_inlines.js javascript and render the formset using the inline_formset template tag from the mizdb_inlines template tag library:

<!DOCTYPE html>
{% load static mizdb_inlines django_bootstrap5 %}
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>My Awesome Form</title>
    {{ combined_media }}
    <script src="{% static 'mizdb_inlines/js/mizdb_inlines.js' %}"></script>
    {% bootstrap_css %}
    {% bootstrap_javascript %}
</head>
<body>
<form class="container mt-3" method="post">
    {% csrf_token %}

    {% bootstrap_form form %}
    {% inline_formset formset layout="horizontal" %}
    {% bootstrap_button button_type="submit" button_class="btn-success" content="Save" %}
    {% bootstrap_button button_type="reset" button_class="btn-warning" content="Reset" %}
</form>
</body>
</html>

The template tag instantiates an InlineFormsetRenderer and returns the renderers render() output. The template tag passes all keyword arguments along to the renderer. The renderer takes an additional keyword argument add_text with which you can set the text of the add button (defaults to the verbose name of the inline formset model). For example, in a template:

{% inline_formset formset layout="horizontal" add_text="Add another delicious Topping" %}

View mixin for inline formsets

Use the InlineFormsetMixin view mixin to remove some of the boilerplate from handling inline formsets. Simply declare the formset classes to use in the formset_classes attribute.

from mizdb_inlines.views import InlineFormsetMixin


class MyView(InlineFormsetMixin, UpdateView):
    model = Pizza
    fields = "__all__"
    template_name = "pizza.html"
    success_url = "/"

    formset_classes = (
        inlineformset_factory(Pizza, Toppings, fields="__all__", extra=1),
        MyAwesomeFormset,
    )

This will add formset instances to the template context with the context variable formsets. The combined media of the formsets and the view's model form is available with the variable combined_media :

{{ combined_media }}

{% for formset in formsets %}
    {% inline_formset formset %}
{% endfor %}

To perform additional actions after the form and formsets have been saved, you can use the post_save hook:

class MyView(InlineFormsetMixin, UpdateView):
    ...
    
    def post_save(self, form, formsets):
        # Log that the form was saved:
        create_logentry(form, formsets)

Tabular inline formset

If you prefer the formset fields to be in a tabular layout, you can use the tabular_inline_formset template tag instead:

{% load mizdb_inlines %}

{% for formset in formsets %}
    {% tabular_inline_formset formset %}
{% endfor %}

Development & Demo

python3 -m venv venv
source venv/bin/activate
make init

See the demo for a preview: run make init-demo and then start the demo server python demo/manage.py runserver.

Run tests with make test. To install required browsers for playwright: playwright install.