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Django 全文检索

作者:互联网

全文检索

操作

1.在虚拟环境中依次安装包

pip install django-haystack
pip install whoosh
pip install jieba

2.修改settings.py文件

INSTALLED_APPS = (
    ...
    'haystack',
)
HAYSTACK_CONNECTIONS = {
    'default': {
        'ENGINE': 'haystack.backends.whoosh_cn_backend.WhooshEngine',
        'PATH': os.path.join(BASE_DIR, 'whoosh_index'),
    }
}
 
#自动生成索引
HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'

3.在项目的urls.py中添加url

 
urlpatterns = [
    ...
    Re_path(r'^search/', include('haystack.urls')),
]

4.在应用目录下建立search_indexes.py文件

# coding=utf-8
from haystack import indexes
from shopadmin import Good
 
 
class GoodIndex(indexes.SearchIndex, indexes.Indexable):
    text = indexes.CharField(document=True, use_template=True)
 
    def get_model(self):
        return GoodsInfo
 
    def index_queryset(self, using=None):
        return self.get_model().objects.all()

5.在目录“templates/search/indexes/shopadmin/”下创建“模型类名称_text.txt”文件

#good_text.txt,这里列出了要对哪些列的内容进行检索
{{ object.name }}
{{ object.description }}

6.在目录“templates/search/”下建立search.html

<!DOCTYPE html>
<html>
<head>
    <title></title>
</head>
<body>
{% if query %}
    <h3>搜索结果如下:</h3>
    {% for result in page.object_list %}
        <a href="/{{ result.object.id }}/">{{ result.object.name }}</a><br/>
    {% empty %}
        <p>啥也没找到</p>
    {% endfor %}
 
    {% if page.has_previous or page.has_next %}
        <div>
            {% if page.has_previous %}<a href="?q={{ query }}&amp;page={{ page.previous_page_number }}">{% endif %}&laquo; 上一页{% if page.has_previous %}</a>{% endif %}
        |
            {% if page.has_next %}<a href="?q={{ query }}&amp;page={{ page.next_page_number }}">{% endif %}下一页 &raquo;{% if page.has_next %}</a>{% endif %}
        </div>
    {% endif %}
{% endif %}
</body>
</html>

7.建立ChineseAnalyzer.py文件(找到python 根路径)

import jieba
from whoosh.analysis import Tokenizer, Token
 
 
class ChineseTokenizer(Tokenizer):
    def __call__(self, value, positions=False, chars=False,
                 keeporiginal=False, removestops=True,
                 start_pos=0, start_char=0, mode='', **kwargs):
        t = Token(positions, chars, removestops=removestops, mode=mode,
                  **kwargs)
        seglist = jieba.cut(value, cut_all=True)
        for w in seglist:
            t.original = t.text = w
            t.boost = 1.0
            if positions:
                t.pos = start_pos + value.find(w)
            if chars:
                t.startchar = start_char + value.find(w)
                t.endchar = start_char + value.find(w) + len(w)
            yield t
 
 
def ChineseAnalyzer():
    return ChineseTokenizer()

8.复制whoosh_backend.py文件,改名为whoosh_cn_backend.py

from .ChineseAnalyzer import ChineseAnalyzer 
查找
analyzer=StemmingAnalyzer()
改为
analyzer=ChineseAnalyzer()

9.生成索引

python manage.py rebuild_index

10.在模板中创建搜索栏

<form method='get' action="/search/" target="_blank">
    <input type="text" name="q">
    <input type="submit" value="查询">
</form>

 

标签:py,whoosh,Django,全文检索,haystack,indexes,page
来源: https://www.cnblogs.com/wyf2019/p/10972664.html