Django的get_context_data函数不起作用？

Question

I'm practicing with Django's Class Based View.

It seems like my overridden get_context_data function is not working properly, but I have no idea what is wrong :(

My code:

urls.py

url(r'^user/(?P<pk>\d+)/posts/$', UserPosts.as_view(), name='user_post'),

views.py

class UserPosts(ListView):
    template_name = 'app_blog/user_posts_page.html'
    context_object_name = 'post_list'

    def get_queryset(self):
        self.user = get_object_or_404(User, id=self.kwargs['pk'])
        return self.user.post_set.order_by('-id')
    def get_context_data(self, **kwargs):   
        context = super(UserPosts, self).get_context_data(**kwargs)
        context['user'] = self.user
        return context

user_post_page.html

{% block content %}
    <div class="main_content">
        <h2>Welcome to {{user.username}}'s User Post Page!</he>
        <ul>
        {% for post in post_list %}
            <li><a href="/blog/post/{{post.id}}/">{{post.post_title}}</a></li>
        {% endfor %}
        </ul>
    </div>
{% endblock %}

The html page correctly displays the user's post_list, BUT the h2 tag displays:

Welcome to 's User Post Page!

I'm pretty sure I passed the 'user' variable in the get_context_data function, but the html page does not displa the user.username... Any idea why this is happening :(??

Thanks

Answer 1

Use another name that is not user . It seems like RequestContext overwrite user variable.

Answer 2

Please see the default TEMPLATE_CONTEXT_PROCESSORS , which set the django.contrib.auth.context_processors.auth .

If TEMPLATE_CONTEXT_PROCESSORS contains this processor, every RequestContext will contain these variables:

• user – An auth.User instance representing the currently logged-in user (or an AnonymousUser instance, if the client isn't logged in).
• perms – An instance of django.contrib.auth.context_processors.PermWrapper , representing the permissions that the currently logged-in user has.

So you'd better give your user variable another name.

Answer 3

As the other answers said, don't use the variable name user . But even more importantly, in this particular case the ListView is not the best generic class to use; instead, you're better off using the DetailView , which makes your view much simpler:

class UserPosts(DetailView):
    model = User
    template_name = 'app_blog/user_posts_page.html'
    context_object_name = 'listed_user'

The only change in your template is to use listed_user instead of the user variable. Since DetailView already looks into the pk URL argument, it will select and return the right User automatically.