class Product(models.Model):
name = models.CharField(max_length=200)
price = models.FloatField()
avgrating = models.FloatField()
def __str__(self):
return self.name
class Rating(models.Model):
Product_id = models.ForeignKey('Product', related_name='Product_id')
User_id = models.ForeignKey('User', related_name='User_id')
rate = models.IntegerField()
我想要 - 产品名称 - 产品价格 - avgrating(AVG评级) - 取决于User_id和Product_id以及
SQL查询如:
select p.name,p.price,p.avgrating,r.rate from Product p, Rating r where User_id=1;
out赞:
在json formate中
{
"name":"Iphone 8",
"Price":80000,
"avgrating":3.5,
"rate":5
}
答案 0 :(得分:1)
results = Rating.objects.filter(User_id_id = 1)
data = []
for res in results:
data.append( {
"name": res.Product_id.name,
"Price": res.Product_id.price,
"avgrating": res.Product_id.avgrating,
"rate": res.rate
})
为什么我使用User_id_id?
Beacuse,Django为所有与密钥相关的名称附加'_id'。因此,如果您直接使用键值,请使用'_id'。