作业有什么问题

Question

怎么了？

File "trunk/website/auth/user/emailchange/views.py" in email_change_view
102. context['form'] = form
File "/usr/local/lib/python2.6/dist-packages/django/template/context.py" in __setitem__
39. self.dicts[-1][key] = value

Exception Type: TypeError at /accounts/email/change/ Exception Value: 'SendUsernameForm' object does not support item assignment

这是代码

else:
    form = EmailChangeForm(username=request.user.username)

context = RequestContext(request, extra_context)
context['form'] = form

return render_to_response(template_name, context_instance=context)

HTML 代码：

<form method="post">{% csrf_token %}
            {{ form.as_p }}
            <p><input type="submit" value="Change email address" /></p>
</form>

有什么想法吗？

Answer 1

将form 添加到extra_context dic，而不是context。

错误的意思是，context['form'] 无效，所以这是一个开始思考是否应该以这种方式使用 RequestContext 的好地方。

RequestContext 文档：http://docs.djangoproject.com/en/dev/ref/templates/api/#django.template.RequestContext

else:
    form = EmailChangeForm(username=request.user.username)

extra_context['form'] = form
context = RequestContext(request, extra_context)