如何在Django CBV ListView中具有多个列表？

Question

In my app, I want to have an index page which will display two lists of objects, where both lists contain the same type of object (ie, same Model).

In traditional function based views this is easy: I define two variables, assign them to querysets, and pass them into the context to my template where I can easily access them by name.

I'm still new to CBVs and it seems there is a lot of magic, a lot of things that are handled automatically. I understand how I can override the queryset for a ListView (which defaults to all objects for the given Model), but what I don't get is how to supply multiple querysets, so that my ListView can actually display two lists.

My only thought so far is to override self.object_list to be a tuple of two querysets, but that seems like it would make my template code less clear and I'm not even certain it would work.

Answer 1

If you do not want to support pagination in your multiple lists view, I would suggest overwriting the get_context_data and get methods of your view class

def get_context_data(self, **kwargs):
    """
    Get the context for this view.
    """
    queryset = kwargs.pop('object_list', self.object_list)
    queryset2 = kwargs.pop('object_list', self.object_list2)

    context = {
        'paginator': None,
        'page_obj': None,
        'is_paginated': False,
        'object_list': queryset,
        'object_list3': queryset2
    }

    context.update(kwargs)

    return context

def get(self, request, *args, **kwargs):
    self.object_list1 = self.get_queryset1()
    self.object_list2 = self.get_queryset2()

    context = self.get_context_data()
    return self.render_to_response(context)

Sorry for the names (1 and 2) but you should place more descriptive whenever I placed names like "get_queryset1"

Answer 2

What is the difference between the items in both lists? If you're talking about a single list (ie queryset) which can be split in two by some of their properties, this should simply be done in the template itself.

For example, imagine you have a list of users, and you want to display them by gender, ie men in one list and women in the other. In this case simply return a single queryset like normally with the ListView , and then in the template put something like:

<h4>Male Users</h4>
<li>
    {% for user in users %}
    {% if not user.is_female %}<ul>{{ user.full_name }}</ul>
    {% endfor %}
</li>

<h4>Female Users</h4>
<li>
    {% for user in users %}
    {% if user.is_female %}<ul>{{ user.full_name }}</ul>
    {% endfor %}
</li>