python - Django self.cleaned_data Keyerror

Question

我正在写一个 Django 网站，我正在为一个表单编写我自己的验证:

class CreateJobOpportunityForm(forms.Form):
    subject = forms.CharField(max_length=30)
    start_date = forms.DateField(widget=SelectDateWidget)
    end_date = forms.DateField(widget=SelectDateWidget)

    def clean_start_date(self):
        start_date = self.cleaned_data['start_date']
        end_date = self.cleaned_data['end_date']
        if start_date > end_date :
            raise forms.ValidationError("Start date should be before end date.")
        return start_date

但是当 start_date 小于 end_date 时它说:

KeyError at /create_job_opportunity
'end_date'

为什么它不能识别 'end_date' 键？

Answer 1

由于一个字段依赖于另一个字段，最好是在表单的 clean 方法中进行清理，而不是单独的 clean_field 方法。

def clean(self):
    cleaned_data = super(CreateJobOpportunityForm, self).clean()
    end_date = cleaned_data['end_date']
    start_date = cleaned_data['start_date']
    # do your cleaning here
    return cleaned_data

否则，您必须确保您的 end_date 字段在 start_date 之前得到清理。