views.py

@ajax_login_required
def share_content(request):
    if request.method == 'POST':
        model = request.POST.get('model').split('.')
        Model = get_model(model[0], model[1])
        shared_object = Model.objects.get(pk=request.POST.get('pk'))
        queryset_companies = _get_company_queryset(shared_object=shared_object)
        form = ShareContentForm(queryset=queryset_companies, data=request.POST)
        if form.is_valid():
            for company in form.cleaned_data.get('companies'):
                shared_object.shared_to.add(company)
        messages.success(request, _('Content has been shared.'))
        return redirect('lbb_stream_business')
    elif request.method == 'GET':
        model = request.GET.get('model').split('.')
        Model = get_model(model[0], model[1])
        shared_object = Model.objects.get(pk=request.GET.get('pk'))
        queryset_companies = _get_company_queryset(shared_object=shared_object)
        form = ShareContentForm(queryset=queryset_companies)
        return render(request, 'companies/share_content_form.html', {'form': form,
                                                                     'pk': shared_object.pk,
                                                                     'model': request.GET.get('model')})


def _get_company_queryset(shared_object):
    queryset_companies = CompanyOffice.objects.filter(company=shared_object.office.company).exclude(pk=shared_object.pk)
    return queryset_companies