如何通过父对象的昵称过滤子对象来获取所有子对象？
我有父实体：

import jakarta.persistence.*;
import lombok.Data;
import org.hibernate.validator.constraints.Length;
@Entity
@Data
@Table(name = "parent")
public class ParentEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Byte id;
    private Integer age;
    
    @Column(columnDefinition = "VARCHAR(100)")
    private String nickname;
}

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我有子实体：

import jakarta.persistence.*;
import lombok.Data;
import org.hibernate.validator.constraints.Length;
@Entity
@Data
@Table(name = "child")
public class ChildEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    private String name;
    private String surname;
    @Column(name = "parent_id", nullable = false)
    private Byte parentId;
    @ManyToOne(targetEntity = ParentEntity.class)
    @JoinColumn(name = "parent_id", updatable = false, insertable = false)
    private ParentEntity parentEntity;
}

型
我有一个repository：

import com.example.ParentEntity;
import com.example.ChildEntity;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository
public interface ChildRepository extends JpaRepository<ChildEntity, String> {
    // I guess something like this but I was not able to figure out
    List<ChildEntity> findAllByParentEntity(String nickname);
}

型