如何让Django表单同时验证多个字段

from django import forms

class MyForm(forms.Form):
    field1 = forms.CharField(max_length=100)
    field2 = forms.EmailField()

    def clean(self):
        cleaned_data = super().clean()
        field1_value = cleaned_data.get('field1')
        field2_value = cleaned_data.get('field2')

        # 自定义验证规则
        if field1_value and field2_value:
            if field1_value == field2_value:
                raise forms.ValidationError("field1和field2的值不能相同")

        return cleaned_data

from django.shortcuts import render
from .forms import MyForm

def my_view(request):
    if request.method == 'POST':
        form = MyForm(request.POST)
        if form.is_valid():
            # 表单验证通过，执行相应的操作
            # 可以通过form.cleaned_data获取验证后的数据
            # 例如：field1_value = form.cleaned_data['field1']
            #      field2_value = form.cleaned_data['field2']
            pass
    else:
        form = MyForm()

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