```object AnnouncementsTable : IntIdTable() { ...

# exposed

[oSumAtrIX]

object AnnouncementsTable : IntIdTable() {
    val author = varchar("author", 32).nullable()
    val title = varchar("title", 64)
    val content = text("content").nullable()
    val channel = varchar("channel", 16).nullable()
    val createdAt = datetime("createdAt")
    val archivedAt = datetime("archivedAt").nullable()
    val level = integer("level")
}

object AttachmentsTable : IntIdTable() {
    val url = varchar("url", 256)
}

So I am trying to make a many to one relation between attachments and announcements. Each announcement can have multiple attachments, but I am not sure how to proceed here. The Exposed wiki is unclear to me here