questions/views.py

   1 # -*- coding: utf-8 -*-
   2 # This file is part of PrawoKultury, licensed under GNU Affero GPLv3 or later.
   3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   4 #
   5 from django.core.urlresolvers import reverse_lazy
   6 from django.db import models
   7 from django.shortcuts import get_object_or_404
   8 from django.views.generic import ListView
   9 from django.views.generic.edit import FormView
  10 from .forms import QuestionForm
  11 from .models import Question, Tag, TagCategory
  12
  13
  14 class QuestionFormView(FormView):
  15     form_class = QuestionForm
  16     template_name = "questions/question_form.html"
  17     success_url = reverse_lazy("questions_thanks")
  18
  19     def form_valid(self, form):
  20         form.save()
  21         return super(QuestionFormView, self).form_valid(form)
  22
  23
  24 class QuestionListView(ListView):
  25     def get(self, request, *args, **kwargs):
  26         self.tag = None
  27         if 'tag' in request.GET:
  28             try:
  29                 self.tag = Tag.objects.filter(items__question__published=True, slug=request.GET['tag'])[0]
  30             except IndexError:
  31                 pass
  32         return super(QuestionListView, self).get(request, *args, **kwargs)
  33
  34     def get_queryset(self):
  35         qs = Question.objects.filter(published=True
  36                 ).order_by('-published_at')
  37         if self.tag:
  38             qs = qs.filter(tags=self.tag)
  39             self.tag.click_count += 1
  40             self.tag.save()
  41         return qs
  42
  43     def get_context_data(self, *args, **kwargs):
  44         context = super(QuestionListView, self).get_context_data(*args, **kwargs)
  45         context['tag'] = self.tag
  46         context['tag_categories'] = TagCategory.objects.all().annotate(click_count = models.Sum('tags__click_count'))
  47         context['tag_lists'] = dict()
  48
  49         tags = Tag.objects.filter(items__question__published=True
  50             ).annotate(c=models.Count('items__tag')).order_by('category__slug', '-c', 'slug')
  51         all_tag_clicks_count = Tag.objects.all().aggregate(models.Sum('click_count'))['click_count__sum']
  52         uncategorized_tag_clicks_count = Tag.objects.filter(category=None).aggregate(models.Sum('click_count'))['click_count__sum']
  53         annotated_categories = dict()
  54         minimum_factor = 0.7
  55         for category in context['tag_categories']:
  56             annotated_categories[category.id] = category
  57             category.factor =  '%.2f' % (minimum_factor + ((float(category.click_count) / all_tag_clicks_count) if all_tag_clicks_count else 0))
  58         for tag in tags:
  59             if tag.category:
  60                 click_count = annotated_categories[tag.category.id].click_count
  61             else:
  62                 click_count = uncategorized_tag_clicks_count
  63             tag.factor = '%.2f' % (minimum_factor + ((float(tag.click_count) / click_count) if click_count else 0))
  64             context['tag_lists'].setdefault(tag.category.id if tag.category else 0, []).append(tag)
  65         return context