elasticsearch : dealing with case and accents

validate-es-behaviour.sh

# delete index (will print an error if 'my_index' doesn't exist, you can safely ignore it)
curl -XDELETE 'http://localhost:9200/my_index'

# create index with its settings
curl -XPOST 'http://localhost:9200/my_index' -d '{
    "index.analysis.analyzer.default.type":"custom",
    "index.analysis.analyzer.default.tokenizer":"standard",
    "index.analysis.analyzer.default.filter.0":"lowercase",
    "index.analysis.analyzer.default.filter.1":"asciifolding"
}'

# check index analyzer behaviour
# we can note that lowercase filter and asciifolding filters work at index phase
# 2 tokens are stored : 'ingenieur' and 'java'
curl -XGET 'localhost:9200/my_index/_analyze?text=Ingénieur+Java'


# add data
curl -XPUT 'http://localhost:9200/my_index/my_type/1' -d '{"reference":"ADV-REF-00000001", "title":"Ingénieur Java"}'
curl -XPUT 'http://localhost:9200/my_index/my_type/2' -d '{"reference":"ADV-REF-00000002", "title":"Conservateur documentaliste"}'
curl -XPUT 'http://localhost:9200/my_index/my_type/3' -d '{"reference":"ADV-REF-00000003", "title":"Technicien qualité validation H/F"}'
curl -XPUT 'http://localhost:9200/my_index/my_type/4' -d '{"reference":"ADV-REF-00000004", "title":"Valet de chambre"}'
curl -XPUT 'http://localhost:9200/my_index/my_type/5' -d '{"reference":"ADV-REF-00000005", "title":"Ingénieur PHP"}'

# search data
# the above queries should return the same results (2 hits)
curl http://localhost:9200/my_index/my_type/_search?q=Ingénieur*
curl http://localhost:9200/my_index/my_type/_search?q=ingénieur*
curl http://localhost:9200/my_index/my_type/_search?q=ingenieur*
curl http://localhost:9200/my_index/my_type/_search?q=Ingén*
curl http://localhost:9200/my_index/my_type/_search?q=ingén*
curl http://localhost:9200/my_index/my_type/_search?q=ingén*
curl http://localhost:9200/my_index/my_type/_search?q=ingen*

The problem is the oposite, i need also to get Ingen ... tried like this:

curl -XGET 'http://172.16.181.128:9200/sandbox/tests/_search' -d '{
"query" : {
"text" : {
"user" : {
"query" : "ingen",
"type" : "boolean",
"operator" : "AND",
"fuzziness" : "0.5"
}
}
}
}'

AND IT WORKS but because the aproximation if i have too many differences between the words than it will not work... so this does not solve all the accent problem.. do someone know how to simply index by IGNORING accents?

You can try this:

analysis-asciifolding

Or replace chars with accents with ? exmple

Find: "camión"
{ "query": { "query_string": { "analyze_wildcard": true, "query": "cami?n" } } }