I am trying to deserialize an associative array into array of objects with a string-key.

{
"en": {
  "name": "Name of product"
},
"ar": {
  "name": "Name of product in arabic"
}
}

I have a class Catalog, where product translations stored in array with a locale as a key.

Symfony serializer returns me an error: The type of the key “ru” must be “int” (“string” given).

Symfony 7.1 is used.

The incoming payload comes from serializing Doctrine Collection with indexBy attribute.

How can I set an type of key for specific field in my class?

Thanks a lot,
Best regards,
Oleg