case and accent insensitive mapping and query in elasticsearch

elasticsearch: case accent insensitive

PUT /my_index
{
  "settings": {
    "analysis": {
      "analyzer": {
        "case_accent_analyzer": {
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "asciifolding"
          ]
        }
      },
      "normalizer": {
        "case_accent_normalizer": {
          "type": "custom",
          "filter": [
            "lowercase",
            "asciifolding"
          ]
        }
      }
    }
  },
  "mappings": {
    "properties": {
      "text": {
        "type": "text",
        "analyzer": "case_accent_analyzer",
        "fields": {
          "keyword": {
            "type": "keyword",
            "normalizer": "case_accent_normalizer"
          }
        }
      },
      "keyword": {
        "type": "keyword",
        "normalizer": "case_accent_normalizer"
      }
    }
  }
}


POST my_index/_doc/1
{ "text":"olá", "keyword": "chá"}

GET /my_index/_doc/1

GET /my_index/_search
{
  "query": {
    "query_string": {
      "query": "keyword:cha AND text.keyword:olá"
    }
  }
}