Spring boot cache return list of objects with null?

Question

Java

Hello! The first time I get data from the database, everything works fine, but when I get null attribute values ​​from the cache
``` code

@Cacheable(value = "userStore)
    public List<UserDto> getAllUsers(String typeCode) {
        return userRepo.findAllByType(typeCode).stream().map(this::mapEntityToDto).collect(Collectors.toList());
    }

Cache response:

[
  {
    "login": null,
    "name": null
  },
  {
    "login": null,
    "name": null
  },
  {
    "login": null,
    "name": null
  }
]

The value of the key in radish is something like this:
��srjava.util.ArrayListx����a�......

Answer 1

Returned null fields, because it inherits these fields from the parent, and it was not serializable.
If your object is serializable and extends an object that is not serializable, then instead of the NotSerializeException which would be useful, the fields of the parent object are only initialized which is why you have them as nulls.