django haystack实现全文检索的示例代码

pip3 install django-haystack
pip3 install whoosh
pip3 install jieba

'''注册app '''
INSTALLED_APPS = [
  'django.contrib.admin',
  'django.contrib.auth',
  'django.contrib.contenttypes',
  'django.contrib.sessions',
  'django.contrib.messages',
  'django.contrib.staticfiles',
  # haystack要放在应用的上面
  'haystack',
  'myapp', # 这个jsapp是自己创建的app
]


'''配置haystack '''
# 全文检索框架配置
HAYSTACK_CONNECTIONS = {
  'default': {
    # 指定whoosh引擎
    'ENGINE': 'haystack.backends.whoosh_backend.WhooshEngine',
    # 'ENGINE': 'myapp.whoosh_cn_backend.WhooshEngine',   # whoosh_cn_backend是haystack的whoosh_backend.py改名的文件为了使用jieba分词
    # 索引文件路径
    'PATH': os.path.join(BASE_DIR, 'whoosh_index'),
  }
}
# 添加此项，当数据库改变时，会自动更新索引，非常方便
HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'

from django.db import models

# Create your models here.
class UserInfo(models.Model):
  name = models.CharField(max_length=254)
  age = models.IntegerField()


class ArticlePost(models.Model):
  author = models.ForeignKey(UserInfo,on_delete=models.CASCADE)
  title = models.CharField(max_length=200)
  desc = models.SlugField(max_length=500)
  body = models.TextField()

from haystack import indexes
from .models import ArticlePost

# 修改此处，类名为模型类的名称+Index，比如模型类为GoodsInfo,则这里类名为GoodsInfoIndex(其实可以随便写)
class ArticlePostIndex(indexes.SearchIndex, indexes.Indexable):
  # text为索引字段
  # document = True，这代表haystack和搜索引擎将使用此字段的内容作为索引进行检索
  # use_template=True 指定根据表中的那些字段建立索引文件的说明放在一个文件中
  text = indexes.CharField(document=True, use_template=True)

  # 对那张表进行查询
  def get_model(self): # 重载get_model方法，必须要有！
    # 返回这个model
    return ArticlePost

  # 建立索引的数据
  def index_queryset(self, using=None):
    # 这个方法返回什么内容，最终就会对那些方法建立索引，这里是对所有字段建立索引
    return self.get_model().objects.all()

{{ object.title }}
{{ object.author.name }}
{{ object.body }}

python manage.py rebuild_index # 建立索引文件

'''1.复制源码中文件并改名 '''
将 /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/
site-packages/haystack/backends/whoosh_backend.py文件复制到项目中
并将 whoosh_backend.py改名为 whoosh_cn_backend.py 放在APP中如：
myapp\whoosh_cn_backend.py

'''2.修改源码中文件'''
# 在全局引入的最后一行加入jieba分词器
from jieba.analyse import ChineseAnalyzer

# 修改为中文分词法
查找
analyzer=StemmingAnalyzer()
改为
analyzer=ChineseAnalyzer()

from django.shortcuts import render

# Create your views here.
import json
from django.conf import settings
from django.core.paginator import InvalidPage, Paginator
from django.http import Http404, HttpResponse,JsonResponse
from haystack.forms import ModelSearchForm
from haystack.query import EmptySearchQuerySet
RESULTS_PER_PAGE = getattr(settings, 'HAYSTACK_SEARCH_RESULTS_PER_PAGE', 20)



def basic_search(request, load_all=True, form_class=ModelSearchForm, searchqueryset=None, extra_context=None, results_per_page=None):
  query = ''
  results = EmptySearchQuerySet()
  if request.GET.get('q'):
    form = form_class(request.GET, searchqueryset=searchqueryset, load_all=load_all)

    if form.is_valid():
      query = form.cleaned_data['q']
      results = form.search()
  else:
    form = form_class(searchqueryset=searchqueryset, load_all=load_all)

  paginator = Paginator(results, results_per_page or RESULTS_PER_PAGE)
  try:
    page = paginator.page(int(request.GET.get('page', 1)))
  except InvalidPage:
    result = {"code": 404, "msg": 'No file found！', "data": []}
    return HttpResponse(json.dumps(result), content_type="application/json")

  context = {
    'form': form,
    'page': page,
    'paginator': paginator,
    'query': query,
    'suggestion': None,
  }
  if results.query.backend.include_spelling:
    context['suggestion'] = form.get_suggestion()

  if extra_context:
    context.update(extra_context)


  jsondata = []
  print(len(page.object_list))
  for result in page.object_list:
    data = {
      'pk': result.object.pk,
      'title': result.object.title,
      'content': result.object.body,

    }
    jsondata.append(data)
  result = {"code": 200, "msg": 'Search successfully！', "data": jsondata}
  return JsonResponse(result, content_type="application/json")