normalizer mapping

gistfile1.txt

private static $mapping = [
  'fiscalCode' => ['type' => 'keyword', 'include_in_all' => false],
  'vatNumber' => ['type' => 'keyword', 'include_in_all' => false],
  'businessName' => ['type' => 'keyword', 'include_in_all' => true,],
  'city' => ['type' => 'keyword', 'normalizer' => 'lowercase_asciifolding', 'include_in_all' => false],     
  'createdAt' => ['type' => 'keyword', 'include_in_all' => false],
];

$settings = [
  'settings' => [
      'index' => [
          'number_of_shards' => 4,
          'number_of_replicas' => 0,
          'analysis' => [
              'normalizer' => [
                  'lowercase_asciifolding' => [
                      'type' => 'custom',
                      'char_filter' => [],
                      'filter' => ['lowercase', 'asciifolding'],
                  ],
              ],
          ]
      ]
  ]
];


$index = $this->elasticaClient->getIndex($this->indexName);
$index->create($settings , true);
        
$mapping = new Mapping();
$mapping->setProperties(self::$mapping);
$elasticaType = $index->getType(self::TYPE);
$elasticaType->setMapping($mapping);