https://mastodon.social/@bmispelon/98896116173634118

form_to_POST.py

from django.forms.widgets import MultiWidget

def form_to_POST(form):
    """
    Given a form, convert its initial data into a dict that can simulate
    the request.POST that would be generated if that form was submitted as-is.

    This will respect the form's prefix and will convert all field values to
    strings.
    """
    data = {}
    for boundfield in form:
        value = boundfield.value()
        widget = boundfield.field.widget
        if not isinstance(widget, MultiWidget):
            data[boundfield.html_name] = value
        else:
            # For MultiWidget, things get a bit more complicated because
            # we need to add several keys to the `data` dict.
            # Unfortunately, the MultiWidget class doesn't provide many useful
            # hooks to split a value into its subwidget-specific components
            # so we end up copy/pasting most of the logic from MultiWidget.render()
            # here.
            decompressed_value = widget.decompress(value)
            for i, (widget, widget_value) in enumerate(zip(widget.widgets, decompressed_value)):
                subwidget_name = '{}_{}'.format(boundfield.html_name, i)
                data[subwidget_name] = widget_value

    return data