@Mapping(target = "id", source = "postId")
    @Mapping(target = "subforumName", source = "subforum.name")
    @Mapping(target = "userName", source = "user.username")
    @Mapping(target = "commentCount", expression = "java(commentCount(post))")
    @Mapping(target = "duration", expression = "java(getDuration(post))")