kotlin - 如何使用 Room `` `@Ignore ``` 注释忽略 kotlin 委托(delegate)属性

Question

我想向我的 Composition 添加一个委托(delegate)属性类，如下

@Entity
data class Composition(
        val author: String="",
        val background: String?,
        val description: String="",
        val downloadURL: String="",
        val duration: String="",
        val headPortrait: String?,
        @PrimaryKey val id: String,
        val isLike: Boolean,
        val likeAmount: String="",
        val playingAmount: Int=0,
        val replyAmount: String?,
        val showStyle: String?,
        val title: String?,
        val userId: String?,
        val commentAmount: String?,
        val cover: String=""
){

    val  showDuration by lazy{
        val minutes = duration.toInt() /60
        val seconds =duration.toInt()%60
        "$minutes:$seconds"
    }
}

但是会出现编译错误，因为委托(delegate)属性无法保存在数据库中。所以我想
添加一个 Ignore该字段的注释。可惜Androidstuio会吐槽 “此注释不适用于目标'具有委托(delegate)的成员属性” .谁有这个问题的想法？

Answer 1

作为用户 IR42在他的评论中指出，你可以使用 @delegate:Ignore .