Question

class item_sort_info(models.Model):
    sort = models.CharField(max_length=100, primary_key=True, null=False)


class items(models.Model):
    name = models.CharField(max_length=15, null=False, primary_key=True)
    inventory = models.PositiveSmallIntegerField(null=False)
    price = models.PositiveIntegerField(null=False)
    sort = models.ForeignKey(item_sort_info, on_delete=models.CASCADE)


class item_info(models.Model):
    serial_num = models.PositiveIntegerField(null=False, primary_key=True)
    items = models.ForeignKey(items, on_delete=models.CASCADE)
    inbound_date = models.DateField(auto_now_add=True)


class pur_history(models.Model):
    customer = models.ForeignKey(customer_info, on_delete=models.CASCADE)
    time = models.DateTimeField(auto_now_add=True)
    item = models.OneToOneField(item_info, on_delete=models.CASCADE)

为什么我会收到Django SQLite＆＃34;外键不匹配＆＃34;执行该脚本时出错？

编译说

外键不匹配 - ＆＃34; pur_history＆＃34;引用＆＃34; item_info＆＃34;

Answer 1

尝试将“ to_field” 参数添加到“ pur_history” 类的字段“ item” 中，

item = models.OneToOneField(item_info, to_field='serial_num', on_delete=models.CASCADE)

我希望这能对我有用

Django SQLite外键不匹配错误

1 个答案: