Я пытаюсь написать простое приложение CRUD для play-slick.Я могу вставить в базу данных и отобразить всех пользователей, но не могу обновить или удалить пользователей.Весь мой код ниже
package models
import javax.inject.{ Inject, Singleton }
import play.api.db.slick.DatabaseConfigProvider
import slick.jdbc.JdbcProfile
import scala.concurrent.{ Future, ExecutionContext }
/**
* A repository for people.
*
* @param dbConfigProvider The Play db config provider. Play will inject this for you.
*/
@Singleton
class PersonRepository @Inject() (dbConfigProvider: DatabaseConfigProvider)(implicit ec: ExecutionContext) {
// We want the JdbcProfile for this provider
private val dbConfig = dbConfigProvider.get[JdbcProfile]
// These imports are important, the first one brings db into scope, which will let you do the actual db operations.
// The second one brings the Slick DSL into scope, which lets you define the table and other queries.
import dbConfig._
import profile.api._
/**
* Here we define the table. It will have a name of people
*/
private class PeopleTable(tag: Tag) extends Table[Person](tag, "people") {
/** The ID column, which is the primary key, and auto incremented */
def id = column[Long]("id", O.PrimaryKey, O.AutoInc)
/** The name column */
def name = column[String]("name")
/** The age column */
def age = column[Int]("age")
/**
* This is the tables default "projection".
*
* It defines how the columns are converted to and from the Person object.
*
* In this case, we are simply passing the id, name and page parameters to the Person case classes
* apply and unapply methods.
*/
def * = (id, name, age) <> ((Person.apply _).tupled, Person.unapply)
}
/**
* The starting point for all queries on the people table.
*/
private val people = TableQuery[PeopleTable]
/**
* Create a person with the given name and age.
*
* This is an asynchronous operation, it will return a future of the created person, which can be used to obtain the
* id for that person.
*/
def create(name: String, age: Int): Future[Person] = db.run {
// We create a projection of just the name and age columns, since we're not inserting a value for the id column
(people.map(p => (p.name, p.age))
// Now define it to return the id, because we want to know what id was generated for the person
returning people.map(_.id)
// And we define a transformation for the returned value, which combines our original parameters with the
// returned id
into ((nameAge, id) => Person(id, nameAge._1, nameAge._2))
// And finally, insert the person into the database
) += (name, age)
}
/**
* List all the people in the database.
*/
def list(): Future[Seq[Person]] = db.run {
people.result
}
def del(id: Int) : Future[Seq[Person]] = db.run {
people.filter(_.id === id).delete
}
def update (id: Int, name: String) : Future[Seq[Person]] = {
db.run(people.filter(_.id === id).update("john"))
}
}
Возможно также, что я исключил некоторые операции импорта, поэтому, пожалуйста, проверьте, нужно ли мне что-либо импортировать.
Я также получаю эту ошибку, и я не знаю, что она означает:
несоответствие типов;Найдено: UserData.this.dbConfig.profile.ProfileAction [Int, slick.dbio.NoStream, slick.dbio.Effect.Write] (который расширяется до) slick.sql.FixedSqlAction [Int, slick.dbio.NoStream, slick.dbio.Effect.Write] требуется: slick.dbio.DBIOAction [Seq [models.User], slick.dbio.NoStream, Nothing]