Django populate a form.ChoiceField field from a queryset and relate the choice back to the model object

You can use ModelChoiceField instead.

choice = forms.ModelChoiceField(queryset=MyChoices.objects.all())

And you can get by simply call cleaned_data like this.

if request.method == "POST":
    form = SubmissionQuickReplyForm(request.POST)
    if form.is_valid():
        ch = form.cleaned_data.get('choice')

For ChoiceField you can use

    choice = forms.ChoiceField(choices=[
    (choice.pk, choice) for choice in MyChoices.objects.all()])

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