表单中的clean()方法不起作用(加载到ListView中)

from django import forms

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

    def clean(self):
        cleaned_data = super().clean()
        field1 = cleaned_data.get("field1")
        field2 = cleaned_data.get("field2")

        if field1 and field2:
            # 添加自定义验证逻辑
            if field1.lower() == 'invalid':
                raise forms.ValidationError("Field 1 cannot be 'invalid'.")
            if field2 < 0:
                raise forms.ValidationError("Field 2 cannot be negative.")

        return cleaned_data

from django.views.generic import ListView
from .forms import MyForm

class MyListView(ListView):
    model = YourModel
    template_name = 'your_template.html'
    context_object_name = 'object_list'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['form'] = MyForm(self.request.POST or None)
        return context

    def post(self, request, *args, **kwargs):
        form = MyForm(request.POST)
        if form.is_valid():
            # 处理表单数据
            pass
        return self.get(request, *args, **kwargs)

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