elasticsearch mapping for products

Question

i want to implement a search engine for my online shopping site
i test a few analyzers but i didn't see significance difference between them.i used snowball,ngram,standard analyzers
i don't know for the products name which analyzer suits and give me the best results,also i don't know which search query i should use
this is my schema for mapping

{
    "settings": {
        "analysis": {
            "analyzer": {
                "autocomplete": {
                    "type": "custom",
                    "tokenizer": "standard",
                    "filter": ["standard", "lowercase", "stop", "kstem", "ngram"]
                }
            }
        }
    }
    ,
    "mappings": {
        "products": {
            "properties": {
                "id": {
                    "type": "integer",
                    "index": "no"
                },
                "name": {
                    "type": "multi_field",
                    "fields": {
                        "name": {
                            "type": "string"
                        },
                        "snowball": {
                            "type": "string",
                            "analyzer": "snowball"
                        },
                        "autocomplete": {
                            "analyzer": "autocomplete",
                            "type": "string"
                        }
                    }
                }
            }
        }
}

and search query,i don't know using match query is good or not for my usecase

{
        "query": {
            "multi_match": {
                "fuzziness":2,
                "type" : "phrase",
                "query": "term",
                "fields": ["name", "name.snowball",
                    "name.autocomplete"]
                }
        }
}

Answer 1

Use the Analyze API to see what tokens are generated in the Lucene index for the different analyzers that you use. The query 'term' is not a good example to test with, use something a bit longer.

What are the requirements for your search?

Don't use the multi-match query to test the results, test the analyzers in individual searches.

curl -XGET 'http://localhost:9200/yourindex/_search?q=name:yourSearchTerm'

curl -XGET 'http://localhost:9200/yourindex/_search?q=name.snowball:yourSearchTerm'

curl -XGET 'http://localhost:9200/yourindex/_search?q=name.autocomplete:yourSearchTerm'

For autocomplete have a look at the Completion Suggesster API.

Also, the Snowball stemmer is quite aggressive and can produce undesirable results, you may want to use a lighter stemmer.