Question About EdgeNGram

[dvreed77]

I'm not seeing the expected behaviour when using the EdgeNGram Analyzer. First I have some setup questions:

I have configured my settings.py as per instructions:

HAYSTACK_CONNECTIONS = {
    'default': {
        'ENGINE': 'elasticstack.backends.ConfigurableElasticSearchEngine',
        'URL': 'http://127.0.0.1:9200/',
        'INDEX_NAME': 'haystack',
    },
}
ELASTICSEARCH_INDEX_SETTINGS = {
     'settings': {
         "analysis": {
             "analyzer": {
                 "synonym_analyzer" : {
                     "type": "custom",
                     "tokenizer" : "standard",
                     "filter" : ["synonym"]
                 },
                 "ngram_analyzer": {
                     "type": "custom",
                     "tokenizer": "lowercase",
                     "filter": ["haystack_ngram", "synonym"]
                 },
                 "edgengram_analyzer": {
                     "type": "custom",
                     "tokenizer": "standard",
                     "filter": ["haystack_edgengram"]
                 }
             },
             "tokenizer": {
                 "haystack_ngram_tokenizer": {
                     "type": "nGram",
                     "min_gram": 1,
                     "max_gram": 15,
                 },
                 "haystack_edgengram_tokenizer": {
                     "type": "edgeNGram",
                     "min_gram": 1,
                     "max_gram": 15,
                     "side": "front"
                 }
             },
             "filter": {
                 "haystack_ngram": {
                     "type": "nGram",
                     "min_gram": 1,
                     "max_gram": 15
                 },
                 "haystack_edgengram": {
                     "type": "edgeNGram",
                     "min_gram": 1,
                     "max_gram": 15
                 },
                 "synonym" : {
                     "type" : "synonym",
                     "ignore_case": "true",
                     "synonyms_path" : "synonyms.txt"
                 }
             }
         }
     }
 }

When I do python manage.py show_mapping --detail I see

default
-------
{
    "django_ct": {
        "include_in_all": false,
        "index": "not_analyzed",
        "type": "string"
    },
    "text": {
        "type": "string",
        "analyzer": "edgengram_analyzer"
    },
    "django_id": {
        "include_in_all": false,
        "index": "not_analyzed",
        "type": "string"
    },
    "address": {
        "type": "string",
        "analyzer": "edgengram_analyzer"
    }
}

Which looks good, but why don't I see this when I do a CURL GET /haystack/_mapping I see:

{
   "haystack": {
      "mappings": {
         "modelresult": {
            "properties": {
               "address": {
                  "type": "string"
               },
               "django_ct": {
                  "type": "string"
               },
               "django_id": {
                  "type": "string"
               },
               "id": {
                  "type": "string"
               },
               "text": {
                  "type": "string"
               }
            }
         }
      }
   }
}

also, when I do a CURL GET /haystack/_settings I see:

{
   "haystack": {
      "settings": {
         "index": {
            "creation_date": "1454206129416",
            "number_of_shards": "5",
            "number_of_replicas": "1",
            "uuid": "3kN6tYG0SHWkICsDT63mBw",
            "version": {
               "created": "2010199"
            }
         }
      }
   }
}

On to expected behavior. When I do:

GET /haystack/modelresult/_search
{
    "query": {
        "match": {
            "text": "bost"
        }
    }
}

I don't get matched on "30 Boston St." for example.

Do I have something configured wrong?

[dvreed77]

I figured it out. The put_mapping call to elastic_search was failing silently since I didn't have a synonyms.txt file.