使用for循环遍历Django模型字段

好吧,首先,如果你试图访问一个你应该使用的对象 get 而不是 filter 自从 得到 返回单个对象,而 滤波器 返回一个查询集。

instance = get_object_or_404(models_bdc, id_bdc='1')  # Get single object or 404 if not found

至于循环,你可以使用Python动态访问Django模型实例的字段 getattr 在你的循环中发挥作用。以下是在您看来实现这一目标的方法:

def your_view(request):
    queryset = models_bdc.objects.filter(id_bdc='1')  # Assuming '1' is a valid id_bdc
    if queryset.exists():
        instance = queryset.first()

        for i in range(1, 4):  # Range should be from 1 to 4 because your fields are indexed from 1 to 3
            index_field = f'bdc_index_line_{i}'
            quantity_field = f'bdc_quantity_{i}'
            description_field = f'bdc_description_{i}'

            index_value = getattr(instance, index_field)
            quantity_value = getattr(instance, quantity_field)
            description_value = getattr(instance, description_field)

            # Replace or process the values as needed
            print(index_value, quantity_value, description_value)

如果你试图为多个对象实现这一点,那么 滤波器 就是这样,你只需为它添加一个循环 queryset 自身:

 queryset = models_bdc.objects.filter(id_bdc='1')  # Assuming '1' is a valid id_bdc

 for instance in queryset:
        for i in range(1, 4): 
            ...