django - 来自 CharField 的具有默认参数的自定义字段

发布于 2025-01-11 20:24:50 字数 768 浏览 0 评论 0原文

我正在尝试在我的项目中使用多个自定义字段。例如CurrencyField。我想给它一个默认参数，如 verbose_name - "mena" 等。Django

引发错误：

kwargs['verbose_name'] = kwargs['verbose_name'] or 'Mena'

我想这是因为我有时使用 verbose_name 作为位置参数。我怎样才能使它“通用”？

class CurrencyChoices(models.TextChoices):
    EUR = 'EUR'
    CHF = 'CHF'
    CZK = 'CZK'
    DKK = 'DKK'
    GBP = 'GBP'
    HRK = 'HRK'
    HUF = 'HUF'
    PLN = 'PLN'
    RON = 'RON'
    SEK = 'SEK'
    USD = 'USD'

class CurrencyField(models.CharField):

    def __init__(self, *args, **kwargs):
        kwargs['verbose_name'] = kwargs['verbose_name'] or 'Mena'
        kwargs['max_length'] = 5
        kwargs['choices'] = CurrencyChoices.choices
        super().__init__(*args, **kwargs)

原文

I'm trying to use multiple custom fields in my project. For example CurrencyField.
I want to give it a default arguments like verbose_name - "mena" etc.

Django raises error:

kwargs['verbose_name'] = kwargs['verbose_name'] or 'Mena'

I guess it's because I sometimes use verbose_name as a positional argument. How can I make it "universal"?

class CurrencyChoices(models.TextChoices):
    EUR = 'EUR'
    CHF = 'CHF'
    CZK = 'CZK'
    DKK = 'DKK'
    GBP = 'GBP'
    HRK = 'HRK'
    HUF = 'HUF'
    PLN = 'PLN'
    RON = 'RON'
    SEK = 'SEK'
    USD = 'USD'

class CurrencyField(models.CharField):

    def __init__(self, *args, **kwargs):
        kwargs['verbose_name'] = kwargs['verbose_name'] or 'Mena'
        kwargs['max_length'] = 5
        kwargs['choices'] = CurrencyChoices.choices
        super().__init__(*args, **kwargs)

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

百思不得你姐 2025-01-18 20:24:50

如果您没有在构造函数中指定 verbose_name ，它将引发一个 KeyError ，您可以使用 .get(…) 来代替，或者也许更好：.setdefault(…)：

class CurrencyField(models.CharField):
    
    def __init__(self, *args, **kwargs):
        kwargs.setdefault('verbose_name', 'Mena')
        kwargs['max_length'] = 5
        kwargs['choices'] = CurrencyChoices.choices
        super().__init__(*args, **kwargs)

If you do not specify the verbose_name in the constructor, it will raise a KeyError, you can work with .get(…) instead, or perhaps even better: .setdefault(…):

class CurrencyField(models.CharField):
    
    def __init__(self, *args, **kwargs):
        kwargs.setdefault('verbose_name', 'Mena')
        kwargs['max_length'] = 5
        kwargs['choices'] = CurrencyChoices.choices
        super().__init__(*args, **kwargs)

回复收藏 0 原文

~没有更多了~