Elasticsearch - using the path hierarchy tokenizer to access different level of categories

Question

I\'m very new in Elasticsearch and have a question about the hierarchical tokenizer of a path. Here is my code example:

My mapping code:

PUT /my_inde         


        

Answer 1

The only way I found to do this is to use the exclude syntax to exclude the levels you don't want.

    {
   "aggs": {
      "category": {
         "terms": {
            "field": "group_path",
            "size": 0, 
            "exclude" : ".*\\..*"
         }
      }
   }
}

Will then return

aggregations: {
     category: {
       buckets: [
          {
             key: Book
             doc_count: 1
          }
          {
             key: DVD
            doc_count: 1
          }
       ]
     }
}

If you select book, you can then search like this

{
    "query" : {
        "filtered": {
            "filter": {
        "prefix": {
          "group_path": "Book"
        }
            }
        }
    },
    "aggs" : {
      "category": {
        "terms": {
          "field": "group_path",
          "size": 0,
          "include" : "Book\\..*",
          "exclude": ".*\\..*\\..*"
        }
      }
    }
}

Will then return

aggregations: {
     category: {
       buckets: [
          {
             key: Book.Thriller
             doc_count: 1
          }
       ]
     }
}