def db_for_read(self, model, **hints):
        return DEFAULT_DB_ALIAS if this_thread_is_pinned() else get_slave()
Send reads to slaves in round-robin unless this thread is "stuck" to
dataset/ETHPy150Open mozilla/inventory/vendor-local/src/django-multidb-router/multidb/__init__.py/PinningMasterSlaveRouter.db_for_read