Java 如何重新声明@Embedded using Room for Android的索引？

使用Room注释@Embedded是一种简化1:1层次结构的简便方法，以便能够从Java/Kotlin中更轻松地使用它，但我在理解和摆脱嵌入列方面遇到了困难

架构如下所示：

@Entity
class TicketRecord {

    @PrimaryKey
    var id: String = ""

    @Embedded(prefix = "origin_")
    var origin: TicketLocationRecord? = null
}

@Entity(foreignKeys = [(ForeignKey(entity = TicketRecord::class, parentColumns = arrayOf("id"), childColumns = arrayOf("ticketRecordId"), onDelete = ForeignKey.CASCADE))],
    indices = [Index("ticketRecordId")])
class TicketLocationRecord {

    @PrimaryKey
    var id: String = ""

    // ForeignKey
    var ticketRecordId: String? = null
}

我不断收到以下警告：

warning: Indices defined in TicketLocationRecord will be dropped when it is merged into TicketRecord (origin). You can re-declare them in TicketRecord. - origin in TicketRecord
private TicketLocationRecord origin;

即使我尝试重新声明索引，如下所示：

@Entity(indices = [
Index(value = ["origin_ticketRecordId"], unique = true)
])
class TicketRecord {

    @PrimaryKey
    var id: String = ""

    @Embedded(prefix = "origin_")
    var origin: TicketLocationRecord? = null
}

---

我如何消除警告，或者通过抑制它们（我想它们不再是真正需要的？）或者通过重新声明它们来修复它？

我想通过将以下内容添加到

TicketRecord

@SuppressWarnings(RoomWarnings.INDEX_FROM_EMBEDDED_ENTITY_IS_DROPPED)

或

看看哪个有效

我认为您不需要重新声明索引，因为带有索引的var基本上与

TicketRecord

中的id值相同，id是主键。我认为主键在sql中是默认索引的

---

origin_ticketRecordId甚至被添加到合并表中，这给我留下了深刻的印象。这是多余的，对吗？

这对我没有帮助。这方面有更新吗？谢谢，你是怎么修好的？

@SuppressWarnings(RoomWarnings.INDEX_FROM_EMBEDDED_FIELD_IS_DROPPED)