Django Paginated Class View

paginated_list_view.py

"""
Very simple PaginatedListView
"""
class PaginatedListView(ListView, FormView):

    queryset = None

    def get_context_data(self, **kwargs):
        #logging.debug('ApplicationListView.get_context_data')
        context = super(self.__class__, self).get_context_data(**kwargs)
        # paginate by
        context['is_paginated'] = self.is_paginated
        context['page_obj'] = self.page_obj
        return context

    def get_queryset(self):
        
        ## this is where you put your code ##
        query_set = CALCULATE YOUR QUERYSET HERE. or use self.query_set
        ## end of your code ##

        # make my own (simple?) pagination
        count = query_set.count()
        MAX_ELEMENTS = 20
        try:
            page = int(self.request.GET.get('page', 0))
        except:
            page = 0

        if page or count>MAX_ELEMENTS:
            import math
            if not page:
                page = 1

            self.is_paginated = True
            _from = (page-1)*MAX_ELEMENTS
            _to = min(page*MAX_ELEMENTS-1, count)
            last_page = math.trunc(count / MAX_ELEMENTS)+1
            query_set = query_set[_from:_to]

            query_string = self.request.GET.copy()
            query_string['page'] = page+1
            next_page_url = query_string.urlencode()
            query_string['page'] = page-1
            prev_page_url = query_string.urlencode()

            self.page_obj = {
                'has_previous': page>1,
                'has_next': page<last_page,
                'number': page,
                'next_page_number': page+1,
                'next_page': next_page_url,
                'prev_page_number': page-1,
                'prev_page': prev_page_url,
                'paginator': {
                    'num_pages': last_page
                }
            }
        else:
            self.is_paginated = False
            self.page_obj = {}

        return query_set

If you are still writing with the old style views (booo!) you need to:

1. take the def get_queryset(self): and make it into def get_paginated_queryset(request, queryset):
2. replace self. with... nothing
3. return query_set, is_paginated, page_obj` (you can combine the last two)
4. in your view, after you calculate the query set, do: yourqueryset, is_paginated, page_obj = get_paginated_queryset(request, yourqueryset)
5. add is_paginated and page_obj to your response context, eg: return render(request, 'myapp/template.html', {"queryset": yourqueryset, "is_paginated": is_paginated, "page_obj": page_obj})