Django-haystack插件实现

项目地址：https://github.com/ylpxzx/lifeblog

步骤

1. 安装依赖包

pip install whoosh,jieba,django-haystack# 尽量采用其他源的pip进行安装，比如
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple django-haystack

2. 将haystack加入INSTALLED_APPS

INSTALLED_APPS = ['django.contrib.admin',...'post','haystack',   #添加该行
]

3. 在需要搜索的应用app下创建search_indexes.py，如在post应用下。

from haystack import indexes
from .models import Post# 类名的命名规则是固定的,严格按照“应用名+Index”
class PostIndex(indexes.SearchIndex, indexes.Indexable):text = indexes.CharField(document=True, use_template=True,template_name='search/indexes/post/post_text.txt')def get_model(self):return Postdef index_queryset(self, using=None):return self.get_model().objects.all()

4. 将site-packages/haystack/backends/whoosh_backend.py复制到应用app下，并更名为whoosh_cn_backend.py

5. 在settings.py中设置haystack配置

# 配置搜索设置
HAYSTACK_CONNECTIONS = {'default': {'ENGINE': 'post.whoosh_cn_backend.WhooshEngine',  # post应用下的whoosh_cn_backend.py文件'PATH': os.path.join(BASE_DIR, 'whoosh_index'),  # 指定了索引文件需要存放的位置，我们设置为项目根目录 BASE_DIR 下的 whoosh_index 文件夹（在建立索引时会自动创建）。},
}
HAYSTACK_SEARCH_RESULTS_PER_PAGE = 6  # 指定如何对搜索结果分页，这里设置为每 6 项结果为一页。
HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'  # 指定什么时候更新索引，这里我们使用 haystack.signals.RealtimeSignalProcessor，作用是每当有文章更新时就更新索引。由于博客文章更新不会太频繁，因此实时更新没有问题。

6. 创建template/search/indexes/app_name/model_text.txt文件,建立指定的字段索引

# 如：创建template/search/indexes/post/post_text.txt
{{ object.title }}
{{ object.content }}

7. 创建索引，自动生成whoosh_index文件夹

# 创建索引
python manage.py rebuild_index  # 输入y即可# 更新索引
python manage.py update_index

8. 在应用app的views.py下继承SearchView

from haystack.views import SearchView
from django.core.paginator import Paginator,EmptyPage,PageNotAnInteger
from django.conf import settings
from django.shortcuts import render,redirect
from django.db.models import Q
class MySearchIndex(SearchView):# template = 'search.html'def extra_context(self):context = super(MySearchIndex,self).extra_context()context['category_list'] = Category.objects.all().order_by('post_category')context['popular_post'] = Post.objects.all().order_by('-total_views')[:4]return contextdef create_response(self):if self.request.GET.get('q'):# print("进入not self.request")keyword = self.request.GET.get('q')# post_info = Post.objects.filter(title__contains=keyword)post_info = Post.objects.filter(Q(title__icontains=keyword)|Q(content__icontains=keyword)).order_by("id")  # 搜索标题和文章内容# post_info = Post.objects.all()paginator = Paginator(post_info, settings.HAYSTACK_SEARCH_RESULTS_PER_PAGE)try:page = paginator.page(int(self.request.GET.get('page', 1)))except PageNotAnInteger:page = paginator.page(1)except EmptyPage:page = paginator.page(paginator.num_pages)context = {'query': self.query,'form': self.form,'page': page,'paginator': paginator,'suggestion': None,}context.update(self.extra_context())return render(self.request, self.template, context)else:qs = super(MySearchIndex, self).create_response()# print(self.get_context())return qs

8. 在应用urls下配置路由

url(r'^search/$', MySearchIndex(), name='haystack_search'),

9. 创建template/search/search.html文件

{% extends 'index.html' %}
{% block Banner %}{% endblock %}{% block area %}<div class="col-lg-8"><div class="blog_left_sidebar"><div class="row">{% for post in page.object_list %}<div class="col-md-6"><article class="blog_style1 small"><div class="blog_img"><img class="img-fluid" style="height: 280px;" src="/media/{{ post.cover }}" alt=""></div><div class="blog_text"><div class="blog_text_inner"><div class="cat"><a class="cat_btn" href="#">{{ post.category }}</a><a href="#"><i class="fa fa-calendar" aria-hidden="true"></i> {{ post.create_time|date:"Y-m-d" }}</a><a href="#"><i class="fa fa-comments-o" aria-hidden="true"></i> 05</a></div><a href="{% url 'post:detail' post.id %}" ><h4>{{ post.title }}</h4></a><p>{{ post.short_detail|safe }}</p><a class="blog_btn" href="{% url 'post:detail' post.id %}">Read More</a></div></div></article></div>{% empty %}<h3>没有找到相关文章</h3>{% endfor %}</div><!-- 分页栏 --><nav class="blog-pagination justify-content-center d-flex"><ul class="pagination">{% if page.has_previous %}<li class="page-item"><a href="{% url 'post:haystack_search' %}?q={{ query }}&page={{ page.previous_page_number }}" class="page-link" aria-label="Previous"><span aria-hidden="true"><span class="lnr lnr-chevron-left"></span></span></a></li>{% else %}<li class="page-item"><a href="#" class="page-link" aria-label="Previous"><span aria-hidden="true"><span class="lnr lnr-chevron-left"></span></span></a></li>{% endif %}{% for num in page.paginator.page_range %}{% if num == page.number %}<li class="page-item active"><a href="{% url 'post:haystack_search' %}?q={{ query }}&page={{ num }}" class="page-link">{{ num }}</a></li>{% else %}<li class="page-item"><a href="{% url 'post:haystack_search' %}?q={{ query }}&page={{ num }}" class="page-link">{{ num }}</a></li>{% endif %}{% endfor %}{% if page.has_next %}<li class="page-item"><a href="{% url 'post:haystack_search' %}?q={{ query }}&page={{ page.next_page_number }}" class="page-link" aria-label="Next"><span aria-hidden="true"><span class="lnr lnr-chevron-right"></span></span></a></li>{% else %}<li class="page-item"><a href="#" class="page-link" aria-label="Next"><span aria-hidden="true"><span class="lnr lnr-chevron-right"></span></span></a></li>{% endif %}</ul></nav></div></div>
{% endblock %}

网上示例需要在字段选取中间加个object,如：

<p>{{ post.object.short_detail|safe }}</p>

项目文件结构

---

异常解决

• ImportError: cannot import name ‘six’ from ‘django.utils’

1. 安装six

pip install six

2. 将six.py复制到django/utils

文件路径

site-packages/six.py

site-packages/django/utils

• ImportError: cannot import name python_2_unicode_compatible

1. 报错位置导入的包替代为以下导入语句

from django.utils.six import python_2_unicode_compatible