Spring JPA :: No converter found capable of converting from type

Question

I am using spring with JPA and trying to execute query using @query with SQL query.and trying to map the result to an object. I have different entity class and mapping to other

Answer 1

You can solve this issue and achieve the result by using projections by making your DTO an interface with getters for columns returned by the query. That's what I did when I faced the same issue.

For example in your case change StatsDTO to interface like shown below, make sure to give alias for your columns if you are using '.' operator:

public interface StatsDTO {
    Integer getUserCount();
    Byte getTypeId();
    Instant getModifiedAt();
}

Also in your query give alias for your columns like userCount, typeId, modifiedAt respectively so that it is mapped correctly.