views.py 文件源码

def sale_edit(request, pk=None):
    if pk:
        instance = get_object_or_404(Sale, pk=pk)
    else:
        instance = Sale()
    form = forms.SaleForm(
        request.POST or None, instance=instance)
    if form.is_valid():
        instance = form.save()
        msg = pgettext_lazy(
            'Sale (discount) message', 'Updated sale') if pk else pgettext_lazy(
                'Sale (discount) message', 'Added sale')
        messages.success(request, msg)
        return redirect('dashboard:sale-update', pk=instance.pk)
    ctx = {'sale': instance, 'form': form}
    return TemplateResponse(request, 'dashboard/discount/sale/form.html', ctx)