Feature Request: Add support for formsets/multiple of the same form

[Francois16]

Problem: The django-tomselect package currently provides excellent integration of the Tom Select library with Django forms. However, it lacks support for Django formsets / using with multiple of the same form

Current Issue:

let wasReset{{ widget.name }} = false;
var {{ widget.name }} = new TomSelect(..., config);

Issue 1: It looks to be an issue with the way variable names are being set from the the widget.name rendering '-' which is causing the JS to break
Proposed solution: Perhaps add property onto the model to be used only for the variable names that replaces dashes -> underscores

Issue 2: It should also be able to handle copying the formset.empty_form which should initialize the widgets
Proposed solution: Honestly not sure how one would go about this

Issue 3: I've tried loading my forms independently using HTMX, this also does not work since having multiple of the same form Tomselect cannot differentiate between them i.e I have a button that adds a new form dynamically, the first form initializes correctly, when I add another form Tomselect cannot initialize it correctly.
Proposed solution: Perhaps initializing the Tomselects with a UUID of some kind using data attributes

[jacklinke]

@Francois16 I had avoided this, mainly because I rarely use formsets myself.

But I figured it would be an easy update. Oops 😆

It involved a major rework of how tomselect.html is organized and the tomselect elements are initialized.

But it's working now in release 2025.1.2!

I haven't updated the docs to reflect the changes yet, but I did add tests along with two demos for the example app:

• Plain formset demo (template, forms, views)
• Model formset demo (template, forms, views)

Enjoy, and let me know if you run into problems!