ModelForm中的DurationField格式 [英] DurationField format in a ModelForm
问题描述
我有一个包含持续时间字段的Django模型:
class Entry(models.Model):
持续时间= models.DurationField()
我想使用ModelForm为该模型渲染一个表单:
class EditEntryForm(forms.ModelForm):
class Meta:
model = Entry
字段= ['持续时间']
这都是正常的。但是,如果编辑现有模型,则在文本框中呈现的持续时间的格式为 HH:MM:SS
我永远不会处理一个多小时的持续时间。我如何更改Django将表单中的字段格式化为 MM:SS
的方式?
我已经在呈现模型时使用了自定义模板过滤器,我只是想不出如何更改表单的呈现方式。
谢谢
您应该可以通过为字段提供自定义小部件来实现此目的:
<$ p从django.forms.widgets导入$ p>
从django.utils.dateparse导入TextInput
导入parse_duration
class DurationInput(TextInput):
def _format_value(self,value):
duration = parse_duration(value)
seconds = duration.seconds
分钟=秒// 60
秒=秒%60
分钟=分钟%60
返回'{:02d}:{:02d}'。format(分钟,秒)
,然后在字段上指定此小部件:
cla ss EditEntryForm(forms.ModelForm):
类Meta:
模型=条目
字段= ['duration']
小部件= {
'duration':DurationInput( )
}
当然,如果供应时间超过一个小时...
I have a Django model that contains a duration field:
class Entry(models.Model):
duration = models.DurationField()
And I want to render a form for this model using a ModelForm:
class EditEntryForm(forms.ModelForm):
class Meta:
model = Entry
fields = ['duration']
Which is all working. However, if editing an existing model, the duration rendered in the text box is of the format HH:MM:SS
I will never be dealing with durations over an hour. How can I change how Django is formatting this field in the form to just be MM:SS
?
I already have a custom template filter in use when rendering the model, I just can't figure out how to change how the form is rendered.
Thanks
You should be able to do this by providing a custom widget for the field:
from django.forms.widgets import TextInput
from django.utils.dateparse import parse_duration
class DurationInput(TextInput):
def _format_value(self, value):
duration = parse_duration(value)
seconds = duration.seconds
minutes = seconds // 60
seconds = seconds % 60
minutes = minutes % 60
return '{:02d}:{:02d}'.format(minutes, seconds)
and then you specify this widget on the field:
class EditEntryForm(forms.ModelForm):
class Meta:
model = Entry
fields = ['duration']
widgets = {
'duration': DurationInput()
}
Of course, this will cause weirdness if you do ever supply durations longer than an hour...
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