Question

我有这样的事情：

class Basket(models.Model):
    owner = models.ForeignKey(User, related_name='user_basket', verbose_name='Owner')
    name = models.CharField("Basket_Name", max_length=30)
    products = models.ManyToManyField('Product', through='BasketProduct', blank=True, null=True)

class BasketProduct(models.Model):
    product = models.ForeignKey('Product')
    basket = models.ForeignKey('Basket')
    quantity = models.IntegerField()

我尝试从用户Basket获取所有产品，并以“Notebook - 2，PC - 5，Phone - 1”的形式创建其价格和名称字符串

我的尝试：

user = request.user
b = Basket.objects.filter(owner=user)
bp = BasketProduct.objects.filter(basket=b)

for a in bp:
    a = '%s - %s' % (a.product, a.quantity)
    print a

这在shell中返回类似的内容：

[06/Oct/2012 19:44:41] "GET /list/ HTTP/1.1" 200 0
PC - 3 #single object
Notebook - 1 #second single object

我需要：string =“PC - 3，Notebook - 1”

请帮忙

Answer 1

你可以做你已经做过的前三个陈述。然后join通过循环查看前三个语句产生的查询集返回的中间结果数组：

', '.join(['%s - %s' % (a.product, a.quantity) for a in bp])

创建多个对象的字符串

1 个答案: