我在用户和 LinkedAccount 之间有一对多的关系,一个用户可以有多个关联的帐户。
LinkedAccount(id, provider_user_id, salt, provider_id, auth_method, avatar_url, User.findBy(user))
我通过在解析器中加载 LinkedAccount 和它的用户没有问题:
我不知道如何用它的 LinkedAccounts 加载用户。我想我需要让用户知道 LinkedAccounts .. 但是如何?
每次我想查找用户是否有给定类型的链接帐户时,我都希望摆脱对数据库的额外 sql 调用。目前我喜欢这样:
def findLinkedAccountByUserAndProvider(userId: Pk[Long], providerId : String) = {
DB.withConnection {
implicit connection =>
SQL("select * from linked_account la where la.user_id = {userId} and la.provider_id = {providerId}")
.on("userId" -> userId, "providerId" -> providerId).as(LinkedAccount.simple.singleOpt)
}
}
或者当用户知道它的 LinkedAccounts 并且 LinkedAccount 知道它的用户时,这会导致问题吗?
用户:
case class User(id: Pk[Long] = NotAssigned,
firstName: String,
lastName: String,
email: String,
emailValidated: Boolean,
lastLogin: DateTime,
created: DateTime,
modified: DateTime,
active: Boolean)
object User {
val simple = {
get[Pk[Long]]("id") ~
get[String]("first_name") ~
get[String]("last_name") ~
get[String]("email") ~
get[Boolean]("email_validated") ~
get[DateTime]("last_login") ~
get[DateTime]("created") ~
get[DateTime]("modified") ~
get[Boolean]("active") map {
case id ~ first_name ~ last_name ~ email ~ email_validated ~ last_login ~ created ~ modified ~ active =>
User(id, first_name, last_name, email, email_validated, last_login, created, modified, active)
}
}
}
关联账户:
case class LinkedAccount(id: Pk[Long] = NotAssigned,
providerUserId: String,
salt: Option[String],
providerId: String,
authMethod: Option[String],
avatarUrl: Option[String],
user: User
)
object LinkedAccount {
val simple = {
get[Pk[Long]]("id") ~
get[String]("provider_user_id") ~
get[Option[String]]("salt") ~
get[String]("provider_id") ~
get[Option[String]]("auth_method") ~
get[Option[String]]("avatar_url") ~
get[Pk[Long]]("user_id") map {
case id ~ provider_user_id ~ salt ~ provider_id ~ auth_method ~ avatar_url ~ user =>
LinkedAccount(id, provider_user_id, salt, provider_id, auth_method, avatar_url, User.findBy(user))
}
}
}