django如何将日期格式化为DD/MM/YYYY [英] django how to format date to DD/MM/YYYY

问题描述

django在这种情况下如何将日期格式化为DD/MM/YYYY:

django how to format date to DD/MM/YYYY in this case :

class Invoice(models.Model):
    date = models.DateField(default=timezone.now)

class InvoiceForm(ModelForm):
    class Meta:
        model = Invoice
        fields = "__all__"

推荐答案

Model 并不关乎如何向客户展示数据，而是关乎如何在数据库中存储数据.

A Model is not about how you present data to the customer, it is about how you store data in the database.

如果向用户显示数据，则取决于激活的设置.例如，如果 USE_L10N 设置[Django-doc] 处于活动状态，它将尝试确定用户的语言环境，并根据该格式设置日期.这意味着德国用户将看到与美国用户不同的日期格式.

If you present data to the user, it depends on the settings that are active. If for example USE_L10N setting [Django-doc] is active, it will try to determine the locale of the user, and based on that format the date. This means that a German user will see a different date format than an American user for example.

如果 USE_L10N 设置为 False ，则使用

If USE_L10N is set to False, the form field with use the first item in the DATE_INPUT_FORMATS setting [Django-doc]. By default this is:

[
    '%Y-%m-%d', '%m/%d/%Y', '%m/%d/%y', # '2006-10-25', '10/25/2006', '10/25/06'
    '%b %d %Y', '%b %d, %Y',            # 'Oct 25 2006', 'Oct 25, 2006'
    '%d %b %Y', '%d %b, %Y',            # '25 Oct 2006', '25 Oct, 2006'
    '%B %d %Y', '%B %d, %Y',            # 'October 25 2006', 'October 25, 2006'
    '%d %B %Y', '%d %B, %Y',            # '25 October 2006', '25 October, 2006' ]

因此它将首先格式化年，月，然后格式化日期，例如 2020-08-28 .因此，您可以为第一个具有Form 更改一个不同的元素(第一个)./#datefield"rel =" nofollow noreferrer> DateField 字段[Django-doc] .

so it will first format the year, month and then date, so 2020-08-28 for example. You thus can specify a different element (first) to change this for all Forms that have DateField fields [Django-doc].

如果要指定一次性字段，则可以使用 DateInput 小部件的 format =… 参数[Django-doc] :

If you want to specify a one-off field, you can use the format=… parameter [Django-doc] of the DateInput widget for example:

from django import forms

class InvoiceForm(ModelForm):
    date = forms.DateField(widget=forms.DateInput(format='%d/%m%Y'))

    class Meta:
        model = Invoice
        fields = '__all__'

然后，您还应该在 DATE_INPUT_FORMATS 设置中包括该格式，并且优先级比重叠"更好.％m/％d/％Y 和％m/％d/％y 之类的格式，以确保也可以解析该值.

Then you should also include the format in the DATE_INPUT_FORMATS setting, and better with a higher priority than "overlapping" formats like %m/%d/%Y and %m/%d/%y, to ensure that the value can also be parsed.

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