I am using NODE JS with elastic search DB . I am using this package https://www.npmjs.com/package/@elastic/elasticsearch I have this collection in my elastic search DB

[
  {
    "_index": "products",
    "_id": "wZRh3n8Bs9qQzO6fvTTS",
    "_score": 1.0,
    "_source": {
      "title": "laptop issues",
      "description": "laptop have issue present in according"
    }
  },
  {
    "_index": "products",
    "_id": "wpRh3n8Bs9qQzO6fvzQM",
    "_score": 1.0,
    "_source": {
      "title": "buy mobile",
      "description": "mobile is in Rs 250"
    }
  },
  {
    "_index": "products",
    "_id": "w5Rh3n8Bs9qQzO6fvzTz",
    "_score": 1.0,
    "_source": {
      "title": "laptop payment",
      "description": "laptop payment is given in any way"
    }
  }
]

now I am planning to fetch data from elastic DB . when I am passing "LAP" or "lap" . it is giving me blank array or [] array why ? "lap" is present in all object

I am doing like that

 const result= await client.search({
      index: 'products',
      query: {
        match_phrase: {
            description: "lap"
        }
      }  

where I am doing wrong . I need all result where lap keywords is present

CodePudding user response：

Match query is not working because you are trying to search partial character of laptop term.

You can use Prefix Query for single term like below:

{
  "query": {
    "prefix": {
      "title": {
        "value": "lap"
      }
    }
  }
}

If you want to search for phrase then you can use Phrase Prefix Query:

{
  "query": {
    "match_phrase_prefix": {
      "title": "lap"
    }
  }
}

If you want to match only some of the word from query then you can use match query with operator set to or.

POST querycheck/_search
{
  "query": {
    "match": {
      "title": {
        "query": "i have issues",
        "operator": "or"
      }
    }
  }
}