def delete(self, doc):
        if doc.id is None:
            raise DatabaseException('Document does not have id')
        if doc.sid is None:
            try:
                rs = self.db.docs.remove({'id': doc.id}, safe=True)
                assert rs['n'] == 1
            except Exception as e:
                raise DatabaseException(e)
            return None
        doc.data = None
        return self.update(doc)
def config(self):
        settings = {
            # Use SYSTEMMPI since openfoam-org doesn't have USERMPI
            'mplib': 'SYSTEMMPI',

            # Add links into bin/, lib/ (eg, for other applications)
            'link': False,
        }
        # OpenFOAM v2.4 and earlier lacks WM_LABEL_OPTION
        if self.spec.satisfies('@:2.4'):
            settings['label-size'] = False
        return settings