Elastic Search - implement "Did you Mean"
As of version 0.90.0.Beta1, ElasticSearch has a "term suggest" feature included, which is what you are looking for:
http://www.elasticsearch.org/guide/reference/api/search/term-suggest/
E.g. get from this query: "devloping distibutd saerch engies"this result: "developing distributed search engines"
Elasticsearch doesn't have it yet, it is opened as issue here basically it is waiting for the next Lucene release.
I achieved a similar "did you mean" behaviour using the phonetic analyzers, which worked for my use case, location names, that is not gonna work for all use cases....
a example mapping:- https://gist.github.com/1171014
so you can query using the REST api like this (mispelled london):-
{ "query": { "field": { "nameSounds": "lundon" } }}
You can use fuzzy search:
"fuzzy" : { "user" : { "value" : "Jon", "boost" : 1.0, "fuzziness" : 3, "prefix_length" : 0, "max_expansions": 100 }}Check this link for fuzzy : http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-fuzzy-query.html