Hits are not being rescored

[bartvanremortele]

I'm having an issue with this plugin. It seems as if no matter what I try to do all of my hits only get rescored by the low.

My query looks like this: (I have also tried using match_all)

query= {
    "query": {
        "function_score": {
            "query": {
                "match": {
                    "data": testString
                }
            },
            "script_score": {
                "script": "entity-resolution",
                "lang": "native",
                "params": {
                    "entity": {
                        "fields": [
                            {
                                "field": "data",
                                "value": testString,
                                "cleaners": [],
                                "comparator": {
                                    "name": "no.priv.garshol.duke.comparators.Levenshtein"
                                },
                                "low": 0.3,
                                "high": 0.88
                            }
                        ]
                    }
                }
            },
            "boost_mode": "replace"
        }
    }
}

and my index looks like this:

    "receipt": {
      "_source": { "enabled": true },
      "properties": {
        "id": { "type": "string" },
        "retailer_id": { "type": "string" },
        "images": {
          "type" : "object",
          "properties": {
            "processed": { "type": "string" },
            "original": { "type": "string" }
          }
        },
        "data": {
          "type": "string",
          "fields": {
            "raw":   { "type": "string", "index": "not_analyzed" }
          }
        },
        "created_at": { "type": "date" },
        "updated_at": { "type": "date" }
      }
    }

I have tried multiple comparators just to try if it actually does anything but I feel like it's not doing anything at all. I'm using elasticsearch Version: 2.1.1, Build: 40e2c53/2015-12-15T13:05:55Z, JVM: 1.8.0_71

I installed the plugin by downloading the .zip and .md5