我有以下功能:功能与未来的返回类型总是返回无
//retrieves record from database
def getAll: Future[List[User]] = {
try {
Logger.info("Getting all user record.")
db.run(userTableQuery.to[List].result)
}
catch {
case ex: Exception => Logger.error("Exception in getting all user record. " + ex)
Future {
List[User]()
}
}
}
//checks whethe the email exist in list or not
def checkEmail(email : String): Future[Option[User]] ={
/* userRepo.getAll.map(userList => userList.filter(user => user.email == email).map { value => println(value)
userList
})*/
userRepo.getAll.map(userList => userList.filter(user => user.email == email).headOption)
}
//allows to sign in and redirects to dashboard
def signIn() = {
Logger.debug("signingIn in progress. ")
loginForm.bindFromRequest.fold(
formWithErrors => {
Logger.error("Sign-In badRequest.")
Future(BadRequest(views.html.home(webJarAssets, formWithErrors, signUpForm)))
},
validData => {
userService.checkEmail(validData.email).map(value => {
value match {
case Some(us) =>Redirect(routes.HomeController.homePage).flashing("ERROR" -> "User exist")
case None => Redirect(routes.HomeController.homePage).flashing("ERROR" -> "User doesn't exist")
}
}
)
}
)
}
但是当我打电话signin()
它总是返回None
。
我使用了一些调试器代码,我猜0123¾里面的checkMail()
工作不正常。 但getall()
正常工作并给出数据库中的所有记录。
那么问题是什么? –
userRepo.getAll返回什么? userRepo是您正在显示其功能的类的实例吗? – sascha10000