播放 2.4 - Slick 3.0.0 - DELETE 不工作

Play 2.4 - Slick 3.0.0 - DELETE not working(播放 2.4 - Slick 3.0.0 - DELETE 不工作)

问题描述

我正在尝试升级到 Slick 3.0.0 和 Play 2.4 (Scala)，但是删除行不起作用.在下面的代码中，一切正常:查询所有行，插入和更新 - 除了删除.

I am trying to upgrade to Slick 3.0.0 and Play 2.4 (Scala), but deleting rows is not working. In the code below, everything works: querying all rows, inserting and updating - except delete.

package dao

import scala.concurrent.Future
import models._
import models.Tables._
import play.api.Play
import play.api.db.slick.DatabaseConfigProvider
import play.api.db.slick.HasDatabaseConfig
import play.api.libs.concurrent.Execution.Implicits.defaultContext
import slick.driver.JdbcProfile

class UserDAO extends HasDatabaseConfig[JdbcProfile] {
  protected val dbConfig =  DatabaseConfigProvider.get[JdbcProfile](Play.current)

  import driver.api._

  def all(): Future[List[UserRow]] = db.run(Tables.User.result).map(_.toList)

  def findByEmail(email: String): Future[Option[UserRow]] = {
    db.run(Tables.User.filter(_.email === email).result.headOption)
  }

  def update(id: Int, newData: UserRow): Future[Int] = {
    db.run(Tables.User.filter(_.id === id).update(newData))
  }

  def delete(id: Int): Future[Int] = {
    db.run(Tables.User.filter(_.id === id).delete)
  }

}

代码生成以下编译错误:

The code generates the following compilation error:

value delete is not a member of slick.lifted.Query[models.Tables.User,models.Tables.User#TableElementType,Seq]

我在application.conf中使用slick.driver.MySQLDriver$/com.mysql.jdbc.Driver，models.Tables.scala文件是slick-codegen lib自动生成的.

I am using slick.driver.MySQLDriver$ / com.mysql.jdbc.Driver in the application.conf, and the models.Tables.scala file is automatically generated by slick-codegen lib.

谁能帮我解决这个问题?谢谢！

Can anyone help me to fix this? Thanks!

推荐答案

尝试导入更具体的 API，而不是 import driver.api._ 使用 import slick.driver.MySQLDriver.api._.

Try importing a more specific API, so instead of import driver.api._ use import slick.driver.MySQLDriver.api._.

我刚刚遇到了同样的问题，发现了这个关于 slick 的错误报告:https://github.com/playframework/play-slick/issues/249

I just had the same issue and found this bug report for slick: https://github.com/playframework/play-slick/issues/249

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