@property
    def file_length(self):
        return self._file_length
Operations that involve sharing FK objects across databases raise an error
dataset/ETHPy150Open timknip/pyswf/swf/movie.py/SWFHeader.file_length--crossover with--dataset/ETHPy150Open django/django/tests/multiple_database/tests.py/QueryTestCase.test_foreign_key_cross_database_protection