@cached_property
    def content_length(self):
        return get_content_length(self.environ)
Returns all devices owned by the given user that can be alerted.
dataset/ETHPy150Open Eforcers/gae-flask-todo/lib/werkzeug/wrappers.py/CommonRequestDescriptorsMixin.content_length--crossover with--dataset/ETHPy150Open viewfinderco/viewfinder/backend/db/device.py/Device.QueryAlertable