Django manytomany 关系："元组"对象没有属性"all"

Question

我在Django中遇到了'self' many - many关系的问题:

My models:

class EcomProduct(models.Model):
    products = models.ManyToManyField('self', through='EcomProductToProduct', symmetrical=False),

class EcomProductToProduct(models.Model):
    from_ecom_product = models.ForeignKey(EcomProduct,related_name='from_ecomproduct')
    to_ecom_product = models.ForeignKey(EcomProduct,related_name='to_ecomproduct')
    class Meta:
        db_table = u'ecom_product_to_product'

现在在views.py中，我需要获得与特定产品相关的所有产品:

def show_product(request, ecomproduct_slug, template_name="catalog/product.html"):
     p = get_object_or_404(EcomProduct, slug=ecomproduct_slug)
     related_products_to_product = p.products.all() #it doesn't work     

And I receive message:

Exception Value: 'tuple' object has no attribute 'all'

我不知道如何修理它。问题是如何将所有相关产品与特定产品联系起来?

Answer 1

在EcomProduct模型定义中的programs声明之后有一个逗号。这会把它变成一个元组，这是你肯定不想要的。