带有钱包推荐和钱包日志的模型架构流程

Question

任务是：我如何link所有三个模型都符合我的要求。

要求： 如果用户推荐某人 (other User) 他将在他的 wallet (Referral Based) 中得到一些 amount 。一个 user 可以 refer 到许多 user.

正如我上面提到的要求标准...请满足需求

我必须创建下面提到的三个模型，它们 link 与 User 模型组合在一起。

1. Wallet
2. Wallet_Log
3. Referral

看到创建的模型需要建议..

class Wallet(models.Model):
    owner = models.OneToOneField(user, related_name='wallet', unique=True)
    amount = models.FloatField(default=0.0)
    datetime = models.DateTimeField(auto_now_add=True,null=True)
    walletID = models.CharField(max_length=10, default="00000")
    ack = models.BooleanField(default=False)

    def __unicode__(self):
            return u'%s' % self.owner

    @property
    def set_ack(self):
        return self.ack

    @set_ack.setter
    def set_ack(self, bol):
        self.ack = bol

class WalletLog(models.Model):
    wallet = models.ForeignKey(Wallet)
    user_from = models.ForeignKey(user, null=True, blank=True)
    amount = models.FloatField()   
    datetime = models.DateTimeField(auto_now_add=True, null=True)
    report = models.CharField(max_length=100)  


    def get_wallet_log(self):
        if(self.wallet):
            return "%s"%(self.wallet.amount)
        else:
            return "Not Available"

    def get_user_from_log(self):
        if(self.user_from):
            return "%s"%(self.user_from.user_first_name)
        else:
            return "Not Available"

    def __unicode__(self):
            return u'%s' % self.wallet


class OrderReferral(models.Model):

    referrer = models.ForeignKey(user, related_name='referrer')
    referred = models.ForeignKey(user, related_name='referred')
    wallet = models.ForeignKey(Wallet, related_name='order_referred')
    created_date = models.DateTimeField()
    updated_date = models.DateTimeField()
    order_active = models.BooleanField()

    def __unicode__(self):
        return '%s %s made a referral' % (self.referrer.first_name, self.referrer.last_name)


    class Meta:
        verbose_name_plural = "Order Referral"

Answer 1

是的最后以适当的方式设置 model relationship 以避免不必要的 join query 通过编写 test case 和 code.

带有钱包推荐和钱包日志的模型架构流程

Model Arcitecture Flow With Wallet Referral and WalletLog

python

django-models

foreign-key-relationship