我有以下代码不起作用......不工作意味着在这种情况下它不会在数据库中持续......
DTO / DAO
def createChangelogEntry(changeLog: ChangelogModel): Future[ChangelogModel] = {
println("..........................................")
println(changeLog)
val entry =
(changelogs returning changelogs.map(_.id)
into ((log,id) => log.copy(id=Some(id)))
) += ChangelogModel(None, changeLog.createdat, changeLog.text)
db.run(entry)
}
在这种情况下可能是什么问题?模型上的匹配工作正常......
U更新:
查询语句:
CREATE TABLE Changelog (
id BIGINT(255) NOT NULL,
createdat DATETIME NOT NULL,
text text NOT NULL
)ENGINE=InnoDB DEFAULT CHARSET=utf8;
我的型号:
package models
import java.sql.Date
import play.api.libs.json.{JsValue, Json, Writes}
/**
* Created by Felix Hohlwegler on 08.06.2017.
*/
case class ChangelogModel(
id: Option[Int] = None,
createdat: String,
text: String
)
object ChangelogModel {
implicit val changelogFormat = Json.format[ChangelogModel]
}
控制器功能:
package controllers
import javax.inject.{Inject, Singleton}
import dto.changelogDTO
import models.{ChangelogModel, ProcessTemplatesModel}
import play.api.libs.json.{JsError, JsSuccess, Json}
import play.api.mvc.{Action, AnyContent, Controller, Request}
import scala.concurrent.Future
/**
* Created by Felix Hohlwegler on 08.06.2017.
*/
@Singleton
class Changelogs @Inject()(changelogDTO: changelogDTO) extends Controller {
def createChangelogEntry = Action { implicit request =>
request.body.asJson.map(_.validate[ChangelogModel] match {
case JsSuccess(process, _) =>
changelogDTO.createChangelogEntry(process)
case err@JsError(_) => BadRequest("TEST")
case _ => BadRequest("fail to create Counter")
}).getOrElse(BadRequest("Failure tu create Counter"))
Ok("s")
}
}
一个问题是您没有等待您的插入从您的控制器完成:
// Problem
case JsSuccess(process, _) => changelogDTO.createChangelogEntry(process)
您应该映射未来并像这样异步返回其结果:
// Do this
case JsSuccess(process, _) => changelogDTO.createChangelogEntry(process).map(model => Ok(Json.toJson(model))
但是,这意味着您将需要所有其他情况也返回期货,并且您必须将结果操作更改为 async。这就是我将如何做到的:
def createChangelogEntry = Action.async(parse.json) { implicit request =>
request.body.validate[ChangelogModel].fold(
errors => Future(BadRequest(JsError.toJson(errors))),
changelogModel => changelogDTO.createChangelogEntry(changelogModel).map(model => Ok(Json.toJson(model))
)
}
同时,您可能会发现通过将当前插入内容包装在这样的方式中更容易调试Await.result
:
import scala.concurrent.duration._
case JsSuccess(process, _) =>
val model = Await.result(changelogDTO.createChangelogEntry(process), 5 seconds)
Ok("We inserted the thing")
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