无法在ElasticSearch索引文档中搜索附件类型字段

Question

Search does not return any results although I do have a document that should match the query.

I do have the ElasticSearch mapper-attachments plugin installed per https://github.com/elasticsearch/elasticsearch-mapper-attachments . I have also googled the topic as well as browsed similar questions in stack overflow, but have not found an answer.

Here's what I typed into a windows 7 command prompt:

c:\Java\elasticsearch-1.3.4>curl -XDELETE localhost:9200/tce
{"acknowledged":true}

c:\Java\elasticsearch-1.3.4>curl -XPUT localhost:9200/tce
{"acknowledged":true}

c:\Java\elasticsearch-1.3.4>curl -XPUT localhost:9200/tce/contact/_mapping -d{\"
contact\":{\"properties\":{\"my_attachment\":{\"type\":\"attachment\"}}}}
{"acknowledged":true}

c:\Java\elasticsearch-1.3.4>curl -XPUT localhost:9200/tce/contact/1 -d{\"my_atta
chment\":\"SGVsbG8=\"}
{"_index":"tce","_type":"contact","_id":"1","_version":1,"created":true}

c:\Java\elasticsearch-1.3.4>curl localhost:9200/tce/contact/_search?pretty
{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 1,
    "max_score" : 1.0,
    "hits" : [ {
      "_index" : "tce",
      "_type" : "contact",
      "_id" : "1",
      "_score" : 1.0,
      "_source":{"my_attachment":"SGVsbG8="}
    } ]
  }
}

c:\Java\elasticsearch-1.3.4>curl localhost:9200/tce/contact/_search?pretty -d{\"
query\":{\"term\":{\"my_attachment\":\"Hello\"}}}
{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 0,
    "max_score" : null,
    "hits" : [ ]
  }
}

Note that the base64 encoded value of "Hello" is "SGVsbG8=", which is the value I have inserted into the "my_attachment" field of the document.

I am assuming that the mapper-attachments plugin has been deployed correctly because I don't get an error executing the mapping command above.

Any help would be greatly appreciated.

Answer 1

What analyzer is running against the my_attachment field?

if it's the standard analyser (can't see any listed) then the Hello in the text will be made lowercase in the index.

ie when doing a term search (which doesn't have an analyzer on it) - try searching for hello

 curl localhost:9200/tce/contact/_search?pretty -d'
     {"query":
       {"term":
         {"my_attachment":"hello"
      }}}'

you can also see which terms have been added to the index:

curl 'http://localhost:9200/tce/contact/_search?pretty=true' -d '{
   "query" : {
      "match_all" : { }
   },
   "script_fields": {
      "terms" : {
        "script": "doc[field].values",
        "params": {
            "field": "my_attachment"
         }
       }
    }
 }'