Question

我有一个CUSTOMER表和一个CUSTOMER_PAYMENT表（包含客户，金额，到期日期和付款）。我想在CUSTOMER中插入一个值时，将自动生成CUSTOMER_PAYMENT中的值。这就像是每月结算信息

在CUSTOMER中插入客户A

CUSTOMER_PAYMENT
____________________________________
|CUSTOMER|AMOUNT|     DUE   | PAID  |
|  A     | 100  | 2011-01-15| False |
|  A     | 100  | 2011-02-15| False |
|  A     | 100  | 2011-03-15| False |

这是怎么做到的？

Django没有触发器。我试过谷歌，但我找不到。

Answer 1

有两种方式：

在post_save信号中编写代码
覆盖save（）方法

<强>信号：

post_save.connect(CUSTOMER_post_save, sender = CUSTOMER , 
                 instance = instance, create = create) 

def CUSTOMER_post_save(sender, instance, **kwargs):
        if create:
            cd = CUSTOMER_PAYMENT()
            cd.amount = ....
            cd.save()

<强>覆写：

class CUSTOMER(model.Model):
    ...    
    def save(self, *args, **kwargs):
        is_new = self.pk is None
        super(yourModel, self).save(*args, **kwargs)
        if is_new:
            cd = CUSTOMER_PAYMENT()
            cd.amount = ....
            cd.save()

Answer 2

Post Save Signals可能是您正在搜索的内容

django：自动将行插入数据库

2 个答案: