使用MongoDB进行弹性搜索：搜索PDF [英] Elastic search With MongoDB : Searching PDFs

问题描述

我正在将我的pdf文件保存在Mongo Db的gridFS中，然后使用弹性搜索搜索该pdf。我执行以下操作：

1）Mongo DB Side：

  mongod --port 27017 --replSet rs0 --dbpathD：\Mongo-DB\mongodb-win32-i386-2.0.7\data17
 mongod --port 27018 --replSet rs0 --dbpath D：\Mongo-DB\mongodb-win32-i386-2.0.7\data18
 mongod --port 27019 --replSet rs0 --dbpathD：\Mongo-DB\mongodb -win32-i386-2.0.7\data19
 
 mongo localhost：27017 
 rs.initiate（）
 rs.add（hostname：27018）
 rs.add（hostname：27019）
 
 mongofiles -hlocalhost：27017 --db testmongo  - 收藏文件 - 类型应用程序/ pdf put D：\Sherlock-Holmes.pdf 
  

2）弹性搜索端（已安装插件：bigdesk / head / mapper-attachments / river-mongodb） p>

- >使用弹性搜索头从任何请求选项卡中提供以下请求

  URL：http：// localhost：9200 / _river / mongodb / 
 _meta / PUT 
 
 {
type：mongodb，
 mongodb：{
db：testmongo，
collection：fs.files，
gridfs：true，
contentType ，
content：base64 / path / filename | perl -pe's / \\\
 / \\\\
 / g'
}，
index：{
name：testmongo，
 type：files，
content_type：application / pdf
} 
} 
  

现在我正在尝试访问以下URL：

  http：// localhost：9200 / testmongo / files / 508e82e21e43def09b5e1602？pretty = true 
  

我收到以下回应（我相信是如预期的）：

  {
_index：testmongo，
_type：files ，
_id：508e82e21e43def09b5e1602，
_version：1，
exists：true，_source：{_id：508e82e21e43def09b5e1602，filename D：\\Sherlock-Holmes.pdf， CHUNKSIZE：262144 uploadDate： 2012-10-29T13：21：38.969Z， MD5： 025fa2046f9254d2aecb9e52ae851065， 长度：98272 ，contentType：application / pdf} 
} 
  

但是当我在尝试使用以下URL搜索此pdf：

  http：// localhost：9200 / testmongo / files / _search？q = Albers& pretty = true 
  

它给我以下结果：

  {
taken：0，
timed_out：false，
_shards：{
total：5，
success：5，
failed：0 
 
hits：{
total：0，
max_score：null，
hits：[] 
} 
} 
  

这里它显示了我没有任何命中，但这个pdf中出现了Albers。请帮忙。感谢提前。

解决方案

我想你必须指定要搜索的属性

  http：// localhost：9200 / testmongo / files / _search？q =< PROPERTYNAME>：Albers& pretty = true 
  

甚至复杂的搜索

  $ curl -XPOST'http：// localhost：9200testmongo / files / _search？q'-d'{
< PROPERTYNAME> ：value，
< PROPERTYNAME> ：{
< PROPERTYNAME> ：value，
< PROPERTYNAME> ：value
} 
} 
'
  

据我所知，您只能在索引数据后搜索您定义的属性。

I were trying to save my pdf file in Mongo Db's gridFS and then searching in that pdfs using elastic search. I performed following :

1) Mongo DB Side:

mongod --port 27017 --replSet rs0 --dbpath "D:\Mongo-DB\mongodb-win32-i386-2.0.7\data17"
mongod --port 27018 --replSet rs0 --dbpath "D:\Mongo-DB\mongodb-win32-i386-2.0.7\data18"
mongod --port 27019 --replSet rs0 --dbpath "D:\Mongo-DB\mongodb-win32-i386-2.0.7\data19"

mongo localhost:27017
rs.initiate()
rs.add("hostname:27018")
rs.add("hostname:27019")

mongofiles -hlocalhost:27017 --db testmongo --collection files --type application/pdf put D:\Sherlock-Holmes.pdf

2) Elastic Search Side (Installed Plugins : bigdesk/head/mapper-attachments/river-mongodb)

-> Using Elastic Search Head given following request from "Any request" tab

URL : http://localhost:9200/_river/mongodb/
_meta/PUT

{
  "type": "mongodb",
  "mongodb": {
    "db": "testmongo",
    "collection": "fs.files",
    "gridfs": true,
    "contentType": "",
    "content": "base64 /path/filename | perl -pe 's/\n/\\n/g'"
  },
  "index": {
    "name": "testmongo",
    "type": "files",
    "content_type": "application/pdf"
  }
}

Now i am trying to access following URL :

http://localhost:9200/testmongo/files/508e82e21e43def09b5e1602?pretty=true

I got following response (Which i believe is as expected) :

{
  "_index" : "testmongo",
  "_type" : "files",
  "_id" : "508e82e21e43def09b5e1602",
  "_version" : 1,
  "exists" : true, "_source" : {"_id":"508e82e21e43def09b5e1602","filename":"D:\\Sherlock-Holmes.pdf","chunkSize":262144,"uploadDate":"2012-10-29T13:21:38.969Z","md5":"025fa2046f9254d2aecb9e52ae851065","length":98272,"contentType":"application/pdf"}
}

But when i were trying to search on this pdf using following URL:

http://localhost:9200/testmongo/files/_search?q=Albers&pretty=true

Its giving me following result :

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 0,
    "max_score" : null,
    "hits" : [ ]
  }
}

Here its showing me no any hit but word "Albers" present in this pdf. Please help. Thanks in advance.

解决方案

i think you have to specify the property to be searched

http://localhost:9200/testmongo/files/_search?q=<PROPERTYNAME>:Albers&pretty=true

or even for complex searches

$ curl -XPOST 'http://localhost:9200testmongo/files/_search?q' -d '{
    <PROPERTYNAME> : "value",
    <PROPERTYNAME> : {
                          <PROPERTYNAME> : "value",
                          <PROPERTYNAME> : "value"
                     }
}
'

but as far as i know you can only search for your defined properties after indexing your data.

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