Django表单:在DateField上设置初始值

Question

我有以下代码来设置DateField和CharField的初始值.CharField的初始值设置正确,但DateField的初始值仍为空白.

class MyForm(forms.ModelForm):
    dummy = fiscal_year_end = forms.CharField()
    date = forms.DateField()

    def __init__(self, *args, **kwargs):

        super(MyForm, self).__init__(*args, **kwargs)
        today = datetime.date.today()
        new_date = datetime.date(year=today.year-1, month=today.month, day=today.day)
        self.fields["date"].initial = new_date
        self.fields["dummy"].initial = 'abc'

Answer 1

您可以在创建DateField的同一行中设置默认值:

date = forms.DateField(initial=datetime.date.today)

或者,如果要传递特定日期,可以创建一个函数并将其传递给DateField,如下所示:

def my_date():
    return datetime.date(year=today.year-1, month=today.month, day=today.day)


class MyForm(forms.ModelForm):
    #...
    date = forms.DateField(initial=my_date)
    #...

此外,您可以查看文档以获得更多帮助;)

Answer 2

我不确定这是否回答了（不是 100% 清楚）最初的问题，但我到了这里，所以这是我的解决方案。

日期字段的HTMLvalue属性包含日期，但其格式取决于语言，而且从来都不是预期的格式。强制日期为 ISO 格式就可以了：

class MyForm(forms.ModelForm):
    my_date = forms.DateField(widget=forms.DateInput(attrs={'type': 'date'}))

    def __init__(self, *args, **kwargs):
        super(MyForm, self).__init__(*args, **kwargs)
        self.initial['my_date'] = self.instance.my_date.isoformat()  # Here