如何使用scala在play-slick中編寫包含引用列的表的插入查詢到另一個表？

Question

我使用slick 3.1，Play框架2.5和scala 2.11。我的應用程序有'用戶'表，其中引用列'addressId'表示'地址'表的'id'列。我無法在這兩個表中插入數據。下面是該

此代碼的用戶窗體：

val registerForm: Form[RegisterForm] = Form { 
mapping(
    "id" -> optional(number), 
    "firstname" -> nonEmptyText.verifying("letters only", name => name.isEmpty || name.matches("[A-z\\s]+")), 
    "lastname" -> nonEmptyText.verifying("letters only", name => name.isEmpty || name.matches("[A-z\\s]+")), 
    "email" -> text.verifying(nonEmpty), 
    "password" -> text.verifying(nonEmpty), 
    "address" -> mapping(
     "id" -> optional(number), 
     "city" -> nonEmptyText.verifying("letters only", name => name.isEmpty || name.matches("[A-z\\s]+")), 
     "state" -> text, 
     "country" -> text, 
     "pin" -> number 
    )(AddressForm.apply)(AddressForm.unapply) 
)(RegisterForm.apply)(RegisterForm.unapply) 
} 

這是兩個模型類：

case class Address(id: Option[Int], city: String, state: String, country: String, pin: Int) 
case class User(id: Option[Int], firstname: String, lastname: String, email: String, password: String, addressId: Option[Int]) 

這裏是映射到相應的數據庫表與表查詢兩類：

private class UserDB(tag: Tag) extends Table[User](tag, "user") { 

def id = column[Option[Int]]("id", O.PrimaryKey, O.AutoInc) 

def firstname = column[String]("firstname") 

def lastname = column[String]("lastname") 

def email = column[String]("email") 

def password = column[String]("password") 

def addressId = column[Option[Int]]("address_id") 

override def * = (id, firstname, lastname, email, password, addressId) <> ((User.apply _).tupled, User.unapply) 

def address_fk= foreignKey("fk_user_address", addressId, addressTable)(_.id) 

} 

private class AddressDB(tag: Tag) extends Table[Address](tag, "address") { 

def id = column[Option[Int]]("id", O.PrimaryKey, O.AutoInc) 

def city = column[String]("city") 

def state = column[String]("state") 

def country = column[String]("country") 

def pin = column[Int]("pin") 

override def * = (id, city, state, country, pin) <> ((Address.apply _).tupled, Address.unapply) 

} 


private val userTable = TableQuery[UserDB] 

private val addressTable = TableQuery[AddressDB] 

請告訴我如何插入數據到兩個相關的表使用光滑的查詢。

非常感謝您提前。

Answer 1

您應該使用ID返回的地址刀片和刀片在單個事務中用戶表，例如：

val query = for { 
    adressId <- addressTable returning addressTable.map(_.id) += Address(....) 
    userTable += User(..., Some(adressId), ....) 
} yield() 

db.run(query.transactionally) 

編輯：上面的查詢，如果你需要創建的用戶，使用不返回任何東西，：

val query = for { 
    adressId <- addressTable returning addressTable.map(_.id) += Address(....) 
    user <- userTable returning userTable += User(..., Some(adressId), ....) 
} yield user 

db.run(query.transactionally)