Django表单中两个日期字段之间的差异

from django import forms
from datetime import datetime

class DateForm(forms.Form):
    start_date = forms.DateField(label='开始日期')
    end_date = forms.DateField(label='结束日期')

    def clean(self):
        cleaned_data = super().clean()
        start_date = cleaned_data.get('start_date')
        end_date = cleaned_data.get('end_date')

        if start_date and end_date:
            if start_date > end_date:
                raise forms.ValidationError('开始日期不能晚于结束日期')

            # 计算日期差异
            diff = end_date - start_date
            cleaned_data['diff'] = diff.days

        return cleaned_data

from django.shortcuts import render
from .forms import DateForm

def calculate_date_diff(request):
    if request.method == 'POST':
        form = DateForm(request.POST)
        if form.is_valid():
            diff = form.cleaned_data['diff']
            return render(request, 'result.html', {'diff': diff})
    else:
        form = DateForm()

    return render(request, 'form.html', {'form': form})

<form method="post">
  {% csrf_token %}
  {{ form.as_p }}
  <button type="submit">计算</button>
</form>

<p>日期差异为: {{ diff }} 天</p>