def get_all_cars_by_attribute(attribute_name, value):
return [
attribute for car in Customer.all() for attribute in car.cars
if attribute[attribute_name] == value
]
def get_all_customers():
return Customer.all()
def get_all_cars():
car_list = [[car for car in customer.cars] for customer in Customer.all()
if customer.cars]
return [car for sub_list in car_list for car in sub_list]