Django haystack实现全文搜索代码示例

from django.db import models
from django.contrib.auth.models import User
class Note(models.Model):
  user = models.ForeignKey(User)
  pub_date = models.DateTimeField()
  title = models.CharField(max_length=200)
  body = models.TextField()

  def __str__(self):
    return self.title

INSTALLED_APPS = [ 
    'django.contrib.admin',
    'django.contrib.auth', 
    'django.contrib.contenttypes', 
    'django.contrib.sessions', 
    'django.contrib.sites', 

     # Added. haystack先添加，
     'haystack', 
     # Then your usual apps... 自己的app要写在haystakc后面
     'blog',
]

import os
HAYSTACK_CONNECTIONS = {
  'default': {
    'ENGINE': 'haystack.backends.whoosh_backend.WhooshEngine',
    'PATH': os.path.join(os.path.dirname(__file__), 'whoosh_index'),
  },
}

import datetime
from haystack import indexes
from myapp.models import Note

class NoteIndex(indexes.SearchIndex, indexes.Indexable):
  text = indexes.CharField(document=True, use_template=True)
  
  author = indexes.CharField(model_attr='user')
  pub_date = indexes.DateTimeField(model_attr='pub_date')

  def get_model(self):
    return Note

  def index_queryset(self, using=None):
    """Used when the entire index for model is updated."""
    return self.get_model().objects.filter(pub_date__lte=datetime.datetime.now())

from django.conf.urls import url
from haystack.views import SearchView

urlpatterns = [
  url(r'^$', SearchView(), name='haystack_search'),
]

{% extends 'base.html' %}

{% block content %}
  <h2>Search</h2>

  <form method="get" action=".">
    <table>
      {{ form.as_table }}
      <tr>
        <td> </td>
        <td>
          <input type="submit" value="Search">
        </td>
      </tr>
    </table>

    {% if query %}
      <h3>Results</h3>

      {% for result in page.object_list %}
        <p>
          <a href="{{ result.object.get_absolute_url }}" rel="external nofollow" >{{ result.object.title }}</a>
        </p>
      {% empty %}
        <p>No results found.</p>
      {% endfor %}

      {% if page.has_previous or page.has_next %}
        <div>
          {% if page.has_previous %}<a href="" rel="external nofollow" >{% endif %}« Previous{% if page.has_previous %}</a>{% endif %}
          |
          {% if page.has_next %}<a href="" rel="external nofollow" >{% endif %}Next »{% if page.has_next %}</a>{% endif %}
        </div>
      {% endif %}
    {% else %}
      {# Show some example queries to run, maybe query syntax, something else"htmlcode">

import os
HAYSTACK_CONNECTIONS = {
  'default': {
    'ENGINE': 'blog.whoosh_cn_backend.WhooshEngine',
    'PATH': os.path.join(BASE_DIR, 'whoosh_index'
  },
}


第三步
重建索引，在进行搜索中文试试吧。
索引自动更新
如果没有索引自动更新，那么每当有新数据添加到数据库，就要手动执行update_index命令是不科学的。自动更新索引的最简单方法在settings.py添加一个信号。

 HAYSTACK_SIGNAL_PROCESSOR =

"haystack.signals.RealtimeSignalProcessor"

官方文档
看了这入门篇，你现在应该大概能配置一个简单的全文搜索了吧，如果想自定义怎么办？ 建议阅读官方文档和github的源码。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。