@json_view(permission='upload_tender_documents', validators=(validate_file_upload,))
    def collection_post(self):
        """Tender Document Upload"""
        if self.request.authenticated_role != 'auction' and self.request.validated['tender_status'] != 'active.enquiries' or \
           self.request.authenticated_role == 'auction' and self.request.validated['tender_status'] not in ['active.auction', 'active.qualification']:
            self.request.errors.add('body', 'data', 'Can\'t add document in current ({}) tender status'.format(self.request.validated['tender_status']))
            self.request.errors.status = 403
            return
        document = upload_file(self.request)
        self.context.documents.append(document)
        if save_tender(self.request):
            self.LOGGER.info('Created tender document {}'.format(document.id),
                        extra=context_unpack(self.request, {'MESSAGE_ID': 'tender_document_create'}, {'document_id': document.id}))
            self.request.response.status = 201
            document_route = self.request.matched_route.name.replace("collection_", "")
            self.request.response.headers['Location'] = self.request.current_route_url(_route_name=document_route, document_id=document.id, _query={})
            return {'data': document.serialize("view")}
dataset/ETHPy150Open openprocurement/openprocurement.api/src/openprocurement/api/views/tender_document.py/TenderDocumentResource.collection_post/original