Django

Question

我有一个货币模型定义如下：

class Currency(models.Model):

    """
    Currency Model
    Defines the attribute of Currency
    """

    class Meta:
        verbose_name        = "Currency"
        verbose_name_plural = "Currencies"
        ordering            = ['Currency_Name']

        def __str__(self):
            return self.Currency_Name

    Currency_Date           = models.DateTimeField(auto_now_add=True)
    Currency_Date_Update    = models.DateTimeField(auto_now=True)
    Currency_Name           = models.CharField(max_length=3, unique=True)
    Is_Secondary_Ccy        = models.CharField(max_length=1, choices=Y_N_BOOLEAN)
    Primary_Currency        = models.ForeignKey('self', on_delete=models.DO_NOTHING, null=True)   # to refer to itself
    Primary_Factor          = models.IntegerField(default=1)
    Currency_Name_Reuters   = models.CharField(max_length=3)

模型通过 "Primary_Currency"

列链接到自身

在我的管理员中（下图）我可以看到链接，但是如果我打开下拉菜单，标签对用户来说不友好"Currency object (0) etc..."

我可以得到 "Primary_Currency" 的值 "Currency_Name" 吗？

感谢您的帮助:)

Answer 1

使用模型 class、

的 __str__() 方法

class Currency(models.Model):
    ...

    # your code

    <b>def __str__(self):
        try:
            return self.Primary_Currency.Currency_Name
        except AttributeError:
            return self.Currency_Name</b>

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