One-To-One Relationship Example

OneToOneRelationExample.kt

@Entity
data class User(
    @PrimaryKey val userId: Long,
    val name: String,
    val age: Int
)

@Entity(foreignKeys = @ForeignKey(entity = User.class,
                                  parentColumns = "userId",
                                  childColumns = "userOwnerId",
                                  onDelete = CASCADE))
data class Library(
    @PrimaryKey val libraryId: Long,
    val title: String,
    val userOwnerId: Long
)

data class UserAndLibrary(
    @Embedded val user: User,
    @Relation(
         parentColumn = "userId",
         entityColumn = "userOwnerId"
    )
    val library: Library
)