处理涉及FieldFile附件的Django表单验证的最佳方法是什么？

from django import forms

class MyForm(forms.Form):
    attachment = forms.FileField()

    def clean_attachment(self):
        attachment = self.cleaned_data['attachment']
        # 验证文件类型
        if not attachment.content_type.startswith('image'):
            raise forms.ValidationError("只允许上传图片文件")
        # 验证文件大小
        if attachment.size > 10 * 1024 * 1024:
            raise forms.ValidationError("文件大小不能超过10MB")
        return attachment

# 在视图函数中使用表单验证和文件上传处理
def my_view(request):
    if request.method == 'POST':
        form = MyForm(request.POST, request.FILES)
        if form.is_valid():
            # 处理验证通过的表单数据和附件
            attachment = form.cleaned_data['attachment']
            # 保存附件到指定位置
            with open('path/to/save/attachment.jpg', 'wb') as f:
                for chunk in attachment.chunks():
                    f.write(chunk)
            # 其他处理逻辑...
    else:
        form = MyForm()
    return render(request, 'my_template.html', {'form': form})