RangeWidget produces 1 subwidget, itself

[Ryan Heard]

The RangeWidget cannot be iterated over correctly, as it returns a list of itself for it's subwidgets.

{% for subwidget in form.date_range.subwidgets %}
  {{ forloop.counter }}
  {{ subwidget }}
{% endfor %}

I would expect that to output "1" then the start widget, then "2" then the end widget. However it only prints "1" and then both widgets, since the subwidget is really the current widget.

[Carlton Gibson]

You need to drill down further to access the child widgets.

form.date_range is a BoundField. subwidgets returns the single item list of the BoundWidget wrapping your RangeWidget, which is a MultiWidget subclass. The RangeWidget has a widgets property containing the child widgets you're after.

As ​per the multi widget docs RangeWidget will add subwidgets to the context to be used by the widget template:

>>>f["a_range"].subwidgets[0].parent_widget.get_context('a_range', '', {})["widget"]["subwidgets"]
[{'name': 'a_range_0', 'is_hidden': False, 'required': False, 'value': None, 'attrs': {}, 'template_name': 'django/forms/widgets/number.html', 'type': 'number'}, {'name': 'a_range_1', 'is_hidden': False, 'required': False, 'value': None, 'attrs': {}, 'template_name': 'django/forms/widgets/number.html', 'type': 'number'}]

It's that that can be iterated as you're intending. Please see TicketClosingReasons/UseSupportChannels.