Django 全文检索haystack实现重载context内容

第一次翻官方文档，确实比看别人写的博客管用多了，看博客说重载extra_context()，然后写了继承调用不出来，博客里面说什么降低haystack版本就可以继承出来，我都觉得这不是开玩笑吗，个人认为高版本代码跑起来总比低版本代码效率高吧，所以不要去降什么库不至于朋友们，还是要尝试下翻官方文档。

https://django-haystack.readthedocs.io/en/master/

'''
官方文档代码
重载context: get_context_data()
# do something
'''
# views.py
from datetime import date

from haystack.generic_views import SearchView

class MySearchView(SearchView):
    """My custom search view."""

    def get_queryset(self):
        queryset = super(MySearchView, self).get_queryset()
        # further filter queryset based on some set of criteria
        return queryset.filter(pub_date__gte=date(2015, 1, 1))

    def get_context_data(self, *args, **kwargs):
        context = super(MySearchView, self).get_context_data(*args, **kwargs)
        # do something
        return context

# urls.py

urlpatterns = [
    url(r'^/search/?$', MySearchView.as_view(), name='search_view'),
]

首先要清楚context里面都有什么（翻代码）

'''
检索出来的内容都在object_list
context['object_list']
'''
context = {
                'paginator': paginator,
                'page_obj': page,
                'is_paginated': is_paginated,
                'object_list': queryset
            }

 输出检索内容的相关国家

# models.py 不完善
class Country(models.Model):
    name = models.CharField(max_length=128, verbose_name='国家', null=True)
    slug = models.SlugField(unique=True, help_text='与该条数据的id值相同即可')

    class Meta:
        verbose_name = '国家'
        verbose_name_plural = '国家列表'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('blog:country', kwargs={'slug': self.slug})

    def get_article_list(self):
        '''返回当前标签下所有发表的文章列表'''
        return Article.objects.filter(country=self)

class Article(models.Model):
    author = models.ForeignKey(settings.AUTH_USER_MODEL, verbose_name='上传人员', on_delete=models.PROTECT)
    title = models.CharField(max_length=150, verbose_name='文章标题')
    country = models.ForeignKey(Country, verbose_name='国家', on_delete=models.PROTECT, null=True)


# views.py
# 重写搜索视图，可以增加一些额外的参数，且可以重新定义名称
class MySearchView(SearchView):
    context_object_name = 'search_list'
    paginate_by = getattr(settings, 'BASE_PAGE_BY', None)
    paginate_orphans = getattr(settings, 'BASE_ORPHANS', 0)
    queryset = SearchQuerySet().order_by('-views')

    def get_context_data(self, *args, **kwargs):
        context = super(MySearchView, self).get_context_data(*args, **kwargs)
        # do something

        for i in context['object_list']:
            print(i.object.country)

        return context


# urls.py
path('search/', MySearchView.as_view(), name='search_view'),  # 全文搜索