Django学习---完成全文检索day6

利用pip一次安装安装包

haystack：全文检索的框架

whoosh：纯Python编写的全文搜索引擎

jieba：一款免费的中文分词包

pip install django-haystack
pip install whoosh
pip install jieba

创建文件夹whoosh_index

创建文件夹： templates/search、templates/search/indexes、templates/search/indexes/df_goods

被检索的模型对象的目录下创建文件(文件名称固定)

df_goods/search_indexes.py

# coding=utf-8
from haystack import indexes
from .models import GoodsInfo


class GoodsInfoIndex(indexes.SearchIndex, indexes.Indexable):
    text = indexes.CharField(document=True, use_template=True)

    def get_model(self):
        # 返回对象类即可
        return GoodsInfo  

    def index_queryset(self, using=None):
        return self.get_model().objects.all()

创建文件(固定格式：模型类名_text.txt)： templates/search/indexes/df_goods/goodsinfo_text.txt

文件内容：对象的属性

{{ object.gtitle }}
{{ object.gjianjie }}
{{ object.gcontent }}

创建显示页面：

templates/search/indexes/search.html

manas/settings.py

# 添加搜索引擎
HAYSTACK_CONNECTIONS = {
    'default': {
        # 指定使用的搜索引擎
        'ENGINE': 'haystack.backends.whoosh_cn_backend.WhooshEngine',
        # 指定索引文件存放位置
        'PATH': os.path.join(BASE_DIR, 'whoosh_index'),
    }
}

#新增的数据自动生成索引 HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'

manas/urls.py

创建ChineseAnalyzer.py文件

保存在haystack的安装文件夹下，Linux路径如“/home/python/.virtualenvs/django_py2/lib/python2.7/site-packages/haystack/backends”
保存在haystack的安装文件，Window路径 C:\Users\Administrator\AppData\Roaming\Python\Python35\site-packages\haystack\backends.

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()

生成索引

python manage.py rebuild_index

搜索栏实现搜索

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

fas

Django学习---完成全文检索day6

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