Suggesting a correct query

It's very common for users to commit a typewriting error or to need help to complete the words. This scenario is solved by ElasticSearch with the suggest functionality.

Getting ready

You need a working ElasticSearch cluster and an index populated with the script available in online code.

How to do it...

For suggesting a correct term by query, we need to perform the following steps:

1. From command line, we can execute the following suggest call:

   curl -XGET 'http://127.0.0.1:9200/test-index/_suggest' -d ' {
     "suggest1" : {
       "text" : "we find tester",
       "term" : {
         "field" : "parsedtext"
       }
     }
   }'
   

2. The result returned by ElasticSearch, if everything is all right, should be as follows:

   {
       "_shards": {
           "failed": 0,
           "successful": 5,
           "total": 5
       },
       "suggest1": [
           {
               "length": 2,
               "offset": 0,
               "options": [],
               "text": "we"
           },
           {
               "length": 4,
              ...