我在两个模型之间有很多个域:
class userProfile(models.Model):
boughtCoupons = models.ManyToManyField(Coupon, through='UserCoupons')
class UserCoupons(models.Model):
user = models.ForeignKey(userProfile)
coupon = models.ForeignKey(Coupon)
date = models.DateField()
class Coupon(models.Mod