django-haystack==2.8.1
drf-haystack==1.8.6
Django==2.0.5
djangrestframework==3.8.2
elasticsearch==6.4.0

# 首先:
cd /usr/local/
mkdir javajdk
# 将下载的文件上传到:
/usr/local/javajdk
# 将文件解压到此文件夹
tar -xzvf jdk-8u231-linux-i586.tar.gz 
mv jdk1.8.0_231 java
# 配置环境变量:
vim /etc/profile

# 在文件最后添加这几行:

export JAVA_HOME=/usr/local/javajdk/java
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

　# 然后

　source /etc/profile

useradd -g elastic elastic
# 在/home新建用户目录
mkdir elastic
# 将下载的安装包上传到 elastic 目录下
tar -xzvf elasticsearch-2.4.1.tar.gz -C /home/elastic/
# 给此目录授权
chown -R elastic:elastic elastic
# 切换用户
su - elastic
# 修改配置文件:
vim /home/elastic/elasticsearch-2.4.1/config/elasticsearch.yml
# 修改内容

path.data: /home/elastic/elasticsearch-2.4.1/data
path.logs: /home/elastic/elasticsearch-2.4.1/logs
network.host: 172.xxx.xxx.xxx
http.cors.allow-origin: "*"
# 如果没有data与logs在相关目录下建立

# 启动ES,在elasticsearch的bin目录下:
./elasticsearch

1.最大文件描述符太少了，至少要65536，修改/etc/security/limits.conf文件
命令：vim /etc/security/limits.conf
内容修改为：* hard nofile 65536

2.一个进程可以拥有的VMA(虚拟内存区域)的数量太少了，至少要262144，修改文件　　
命令：vim /etc/sysctl.conf
增加内容为：vm.max_map_count=262144

3.最大线程太少了，至少要4096，修改/etc/security/limits.conf文件
命令：vim /etc/security/limits.conf
增加内容为：* hard nproc 65536

1.插件安装方式（推荐）
#在Elasticsearch目录下
elasticsearch/bin/plugin install mobz/elasticsearch-head

2.下载安装方式
从https://github.com/mobz/elasticsearch-head下载ZIP包。

在 elasticsearch  目录下创建目录/plugins/head/_site 并且将刚刚解压的elasticsearch-head-master目录下所有内容COPY到当前创建的/plugins/head/_site/目录下即可。

需要注意的是在5.xx后的版本,安装方法与这个不一样!

3.重启elasticsearch访问:
 访问地址是http://{你的ip地址}:9200/_plugin/head/
 http  端口默认是9200  

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'rest_framework',
    'silk',
    'debug_toolbar',
    'haystack',
    'app001',
]


# 搜索引擎配置:

# haystack配置
HAYSTACK_CONNECTIONS = {
    'default': {
        # 'ENGINE': 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine',
        'ENGINE': 'app001.elasticsearch_ik_backend.IKSearchEngine',    # 如果配置分词需要重新制定引擎,下面会写到
        'URL': 'http://172.16.xxx.xxx:9200/',　　 # elasticseach 服务地址
        'INDEX_NAME': 'haystack',                # 索引名称
    },
}

# 保持索引都是最新的
HAYSTACK_SIGNAL_PROCESSOR  =  'haystack.signals.RealtimeSignalProcessor'
# 搜索显示的最多条数
HAYSTACK_SEARCH_RESULTS_PER_PAGE  =  50

from haystack.backends.elasticsearch_backend import ElasticsearchSearchBackend
from haystack.backends.elasticsearch_backend import ElasticsearchSearchEngine
class IKSearchBackend(ElasticsearchSearchBackend):
    DEFAULT_ANALYZER = "ik_max_word" # 这里将 es 的 默认 analyzer 设置为 ik_max_word

    def __init__(self, connection_alias, **connection_options):
        super().__init__(connection_alias, **connection_options)

    def build_schema(self, fields):
        content_field_name, mapping = super(IKSearchBackend, self).build_schema(fields)
        for field_name, field_class in fields.items():
            field_mapping = mapping[field_class.index_fieldname]
            if field_mapping["type"] == "string" and field_class.indexed:
                if not hasattr(
                    field_class, "facet_for"
                ) and not field_class.field_type in ("ngram", "edge_ngram"):
                    field_mapping["analyzer"] = getattr(
                        field_class, "analyzer", self.DEFAULT_ANALYZER
                    )
            mapping.update({field_class.index_fieldname: field_mapping})
        return content_field_name, mapping


class IKSearchEngine(ElasticsearchSearchEngine):
    backend = IKSearchBackend

class EsSearch(APIView):
    def get(self,request):
        es = Elasticsearch(["http://xxx.xxx.xxx.xxx:9200"])
        query = request.GET.get("query")
　　　　　# 这里面的搜索方式可以定制你自己想要用的查询:
　　　　　　
　　　　　# https://www.elastic.co/guide/cn/elasticsearch/guide/current/match-query.html

        body = {
                "query":{
                    "multi_match": {
                    "query": "%s" % query,
                    "fields": [ "text", "content" ]
                    }
                },
                "highlight":{
                    "fields":{
                        "content":{},
                        "text":{}
                    }
                }
            }
        result = es.search(index="haystack", doc_type="modelresult", body=body)
        return Response(result)

"""tool_bar URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/2.0/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path
from django.conf import settings
from django.conf.urls import url,include
from django.conf.urls.static import static
from django.conf import settings


from app001.views import Index,Uploads
from rest_framework import routers

from app001.views import LocationSearchView,EsSearch
from app002.views import BlogView

# drf-haystack查询
router = routers.DefaultRouter()
router.register("search", LocationSearchView,base_name="location-search")

urlpatterns = [
    # 使用自定义查询
    url(r'elastic_search/',EsSearch.as_view()),
　　url(r"api/", include(router.urls)),

]