Django源码学习-8-ListView 通用视图-续

from django.views.generic import ListView

context_object_name [get_context_object_name()]

extra_context

model

queryset
用来代替 model, 比如: Publisher.objects.all()[:10]  
模板 context 中的变量名会有 object_list, <model_name>_list (publisher_list)，拥有相同数据

ordering
一个字符串或数组，传给 queryset; 相当于：queryset.objects.order_by()

allow_empty

paginate_by [get_paginate_by()]
每页的 object 的数量，页数用 request.GET (?page=1) 或 path('<int:page>\', PublisherList.as_view()) 指明;
 (第一页是: ?page=1, 最后一页是：?page=last)

paginate_orphans
指明最后一页最多可以有几个 object (正常+溢出)

template_name [get_template_names()]

template_name_suffix：默认为 '_list'

allow_empty
默认为 True (False 表示 object_list 为 空时，显示 404)

get_context_data()
可以添加额外的模板 context , 默认将 model / queryset 指定的 objects 添加到模板 context

get_queryset()
默认返回属性 queryset

from django.views.generic import ListView

class PublisherBookList(ListView):

    template_name = 'books/books_by_publisher.html'

    def get_queryset(self):
        self.publisher = get_object_or_404(Publisher, name=self.kwargs['publisher']) # 根据链接提取除publisher
        return Book.objects.filter(publisher=self.publisher)  # 筛选出该出版社的所有书籍

    def get_context_data(self, **kwargs):
        # Call the base implementation first to get a context
        context = super().get_context_data(**kwargs)
        # Add in the publisher
        context['publisher'] = self.publisher  # 将 publisher 添加到 模板 context
        return context