Java 对布尔Y/N字段使用JPA AttributeConverter:"；无法呈现布尔文字值"；

我正在实现将“Y”/“N”列转换为布尔值的解决方案：

@Basic(optional = false)
@Column(name = "ACTIVE_YN")
@Convert(converter = BooleanToStringConverter.class)
private Boolean active;

。。以及：

@Converter
public class BooleanToStringConverter implements AttributeConverter<Boolean, String> {

    @Override
    public String convertToDatabaseColumn(Boolean value) {
        return (value != null && value) ? "Y" : "N";
    }

    @Override
    public Boolean convertToEntityAttribute(String value) {
        return "Y".equals(value);
    }
}

错误：

java.lang.IllegalArgumentException: Validation failed for query for method public abstract x.y.z.MyThing x.y.z.MyThingRepository.findOneActive(x.y.z.ThingIdEnum)!
...
Unable to render boolean literal value [select thing from MyThing thing where thing.id = :id and thing.active = true]
...
org.hibernate.type.descriptor.converter.AttributeConverterTypeAdapter cannot be cast to org.hibernate.type.LiteralType

---

事实证明，因为该字段在转换之前是varchar/char，所以JPQL需要将其视为字符串。我不确定是否有更好的方法来做到这一点，但以下方法奏效了：

@Query("select thing from MyThing thing where thing.id = :id and thing.active = 'Y'")
public MyThing findOneActive(@Param("id") ThingIdEnum id);

@Query("select thing from MyThing thing where thing.id = :id and thing.active = 'Y'")
public MyThing findOneActive(@Param("id") ThingIdEnum id);