Python django.views.generic.ListView() Examples

def get_list_class_view(self):
        name = '{0}_{1}'.format(self.get_name(), 'ListView')
        options_dict = {
            'kind': 'list',
            'model': self.model,
        }

        if hasattr(self, 'list_template_name') and self.list_template_name:
            options_dict['template_name'] = self.list_template_name

        parent_classes_list = [FallbackTemplateMixin]
        parent_classes_list.extend(self.list_mixins)
        parent_classes_list.append(self.list_view_class)

        klazz = type(name, tuple(parent_classes_list), options_dict )
        klazz.get_context_data = self.get_get_context_data(klazz)

        return klazz 

def get_context_data(self, **kwargs):
        """
        在视图函数中将模板变量传递给模板是通过给 render 函数的 context 参数传递一个字典实现的，
        例如 render(request, 'blog/index.html', context={'post_list': post_list})，
        这里传递了一个 {'post_list': post_list} 字典给模板。
        在类视图中，这个需要传递的模板变量字典是通过 get_context_data 获得的，
        所以我们复写该方法，以便我们能够自己再插入一些我们自定义的模板变量进去。
        """

        # 首先获得父类生成的传递给模板的字典。
        context = super(IndexView, self).get_context_data(**kwargs)

        # 父类生成的字典中已有 paginator、page_obj、is_paginated 这三个模板变量，
        # paginator 是 Paginator 的一个实例，
        # page_obj 是 Page 的一个实例，
        # is_paginated 是一个布尔变量，用于指示是否已分页。
        # 例如如果规定每页 10 个数据，而本身只有 5 个数据，其实就用不着分页，此时 is_paginated=False。
        # 关于什么是 Paginator，Page 类在 Django Pagination 简单分页。
        # 由于 context 是一个字典，所以调用 get 方法从中取出某个键对应的值。

        paginator = context.get('paginator')
        page = context.get('page_obj')
        is_paginated = context.get('is_paginated')

        # 调用自己写的 pagination_data 方法获得显示分页导航条需要的数据，见下方。
        pagination_data = self.pagination_data(paginator, page, is_paginated)

        # 将分页导航条的模板变量更新到 context 中，注意 pagination_data 方法返回的也是一个字典。
        context.update(pagination_data)

        # 将更新后的 context 返回，以便 ListView 使用这个字典中的模板变量去渲染模板。
        # 注意此时 context 字典中已有了显示分页导航条所需的数据。

        context['category'] = self.big_slug
        return context 

def post(self, request, *args, **kwargs):
        self.object = self.get_object()

        # Make sure the ListView gets setup
        self.get(self.request, *self.args, **self.kwargs)

        # Check form validity
        transaction_form = self.get_transaction_form()
        leg_formset = self.get_leg_formset()

        if transaction_form.is_valid() and leg_formset.is_valid():
            return self.form_valid(transaction_form, leg_formset)
        else:
            return self.form_invalid(transaction_form, leg_formset) 

def test_views_have_correct_parent_class(self):
        self.assertEquals(self.list_view.__bases__[-1].__name__, "ListView")
        self.assertEquals(self.create_view.__bases__[-1].__name__, "CreateView")
        self.assertEquals(self.update_view.__bases__[-1].__name__, "UpdateView")
        self.assertEquals(self.delete_view.__bases__[-1].__name__, "DeleteView")
        self.assertEquals(self.detail_view.__bases__[-1].__name__, "DetailView") 

def test_views_have_correct_parent_class(self):
        self.assertEquals(self.list_view.__bases__[-1].__name__, "ListView")
        self.assertEquals(self.create_view.__bases__[-1].__name__, "CreateView")
        self.assertEquals(self.update_view.__bases__[-1].__name__, "UpdateView")
        self.assertEquals(self.delete_view.__bases__[-1].__name__, "DeleteView")
        self.assertEquals(self.detail_view.__bases__[-1].__name__, "DetailView") 

def question_list_view():
    class DummyView(mixins.ProjectMixin, ListView):
        model = question_models.Question
    return DummyView.as_view() 

def get_context_data(self, **kwargs):
        context = super(ListView, self).get_context_data(**kwargs)
        self.generate_product_version_data(context)
        return context 

def get(self, request, *args, **kwargs):
        return generic.ListView.get(self, request, *args, **kwargs) 

def get(self, request, *args, **kwargs):
        return generic.ListView.get(self, request, *args, **kwargs) 

def get_context_data(self, *, object_list=None, **kwargs):  # pylint: disable=unused-argument
        """Overriding get_context_data to add additional context."""
        context = super(ListView, self).get_context_data(**kwargs)

        # Provides the base template to extend from
        context['template_extends'] = self.template_extends

        return context 

def get_context_data(self, **kwargs):
        context = super(ListView, self).get_context_data(**kwargs)
        context['title'] = context['panel_title'] = _('Search: ') + self.kwargs.get('keyword')
        context['show_order'] = True
        return context 

def get_context_data(self, **kwargs):
        context = super(ListView, self).get_context_data(**kwargs)
        context['user'] = User.objects.get(pk=self.kwargs.get('pk'))
        context['panel_title'] = context['title'] = context['user'].username
        return context 

def get_context_data(self, **kwargs):
        context = super(ListView, self).get_context_data(**kwargs)
        current = Topic.objects.visible().get(pk=self.kwargs.get('pk'))
        current.increase_view_count()
        context['topic'] = current
        context['title'] = context['topic'].title
        context['node'] = context['topic'].node
        context['form'] = ReplyForm()
        return context 

def get_context_data(self, **kwargs):
        context = super(ListView, self).get_context_data(**kwargs)
        context['node'] = node = Node.objects.get(pk=self.kwargs.get('pk'))
        context['title'] = context['panel_title'] = node.title
        context['show_order'] = True
        return context 

def get_context_data(self, **kwargs):
        context = super(ListView, self).get_context_data(**kwargs)
        context['panel_title'] = _('New Topics')
        context['title'] = _('Index')
        context['show_order'] = True
        return context 

def get_queryset(self, **kwargs):
        queryset = Site.objects.filter(project_id=self.kwargs.get('pk'), is_survey=False, is_active=True)
        
        if self.kwargs.get('region_id') == "0":
            object_list = queryset.filter(region=None)
        else:    
            object_list = queryset.filter(region_id=self.kwargs.get('region_id'))
        return object_list

# class RegionalSitelist(ProjectRoleMixin, TemplateView):
#     def get(self, request, *args, **kwargs):
#         queryset = Site.objects.filter(project_id=self.kwargs.get('pk'), is_survey=False, is_active=True)
#         if self.kwargs.get('region_id') == "0":
#             object_list = queryset.filter(region=None)
#         else:    
#             object_list = queryset.filter(region_id=self.kwargs.get('region_id'))
#         if self.kwargs.get('region_id') == "0":
#             return render(request, 'fieldsight/site_list.html',{'object_list':object_list, 'project_id':self.kwargs.get('pk'),'type':"Unregioned", 'pk': self.kwargs.get('pk'),'region_id':self.kwargs.get('region_id'),})
        
#         obj = get_object_or_404(Region, id=self.kwargs.get('region_id'))
#         return render(request, 'fieldsight/site_list.html',{'object_list':object_list, 'obj':obj, 'type':"region", 'pk': self.kwargs.get('pk'), 'region_id':self.kwargs.get('region_id'),})

# class RegionalSitelist(ProjectRoleMixin, ListView):
#     paginate_by = 10
#     def get(self, request, *args, **kwargs):
#         if self.kwargs.get('region_pk') == "0":
#             sites = Site.objects.filter(region=None)
#             return render(request, 'fieldsight/site_list.html' ,{'all_sites':sites, 'project_id':self.kwargs.get('pk'),'type':"Unregioned",'pk':self.kwargs.get('region_pk'),})

#         obj = get_object_or_404(Region, id=self.kwargs.get('region_pk'))
#         sites = Site.objects.filter(region_id=self.kwargs.get('region_pk'))
#         return render(request, 'fieldsight/site_list.html',{'all_sites':sites, 'obj':obj, 'type':"region",'pk':self.kwargs.get('region_pk'),}) 

def get_queryset(self):
        """
        Gets queryset for ListView to return to view
        """
        # Filter by program (self.program set in test_func())
        financial_aids = FinancialAid.objects.filter(
            tier_program__program=self.program
        )

        # Filter by status
        self.selected_status = self.kwargs.get("status", None)
        if self.selected_status is None or self.selected_status not in FinancialAidStatus.ALL_STATUSES:
            self.selected_status = self.default_status
        financial_aids = financial_aids.filter(status=self.selected_status)

        # Filter by search query
        self.search_query = self.request.GET.get("search_query", "")
        search_query = reduce(
            lambda q, term: (
                q |
                Q(user__profile__first_name__icontains=term) |
                Q(user__profile__last_name__icontains=term)
            ),
            self.search_query.split(),
            Q()
        )
        if search_query:
            financial_aids = financial_aids.filter(search_query)

        # Annotate with adjusted cost
        self.course_price = self.program.price
        financial_aids = financial_aids.annotate(adjusted_cost=self.course_price - F("tier_program__discount_amount"))

        # Sort by field
        self.sort_field = self.request.GET.get("sort_by", self.default_sort_field)
        if self.sort_field.startswith("-"):
            self.sort_field = self.sort_field[1:]
            # Defined above: self.sort_direction = ""
            self.sort_direction = "-"
        if self.sort_field not in self.sort_fields:
            self.sort_field = self.default_sort_field
            self.sort_direction = ""
        financial_aids = financial_aids.order_by(
            "{sort_direction}{sort_field}".format(
                sort_direction=self.sort_direction,
                sort_field=self.sort_field_mappings.get(self.sort_field, self.sort_field)
            )
        )

        return financial_aids