斯卡拉playframework在flatMap

Question

確定返回

我有以下功能：

def createProcessTemplate: Action[AnyContent] = Action.async { implicit request => 
    println(request.body.asJson) 
    request.body.asJson.map(_.validate[ProcessTemplatesModel] match { 
     case JsSuccess(process, _) => 
     processTemplateDTO.createProcessTemplate(process).map { 
      process => { 

      // Create process steps templates 
      createNewProcessStepTemplate(request, process.id.get) 


      // Create prerequisites 
      createProcessTemplatePrerequisite(request, process.id.get) 

      // Create postConditions 
      createProcessTemplatePostCondition(request, process.id.get) 

      processTemplateDTO.getProcessStepTemplates(process.id.get).flatMap(
       steps => Ok(Json.obj("id" -> process.id, "title" -> process.title, "steps" -> steps))) 
      } 
     } 
     case JsError(_) => 
     Future.successful(BadRequest("Process Template not create client")) 
     case _ => Future.successful(BadRequest("Process Template create client")) 
    }).getOrElse(Future.successful(BadRequest("Process Template create client"))) 
    } 

我想回到在確定聲明的步驟，但得到這個錯誤：

可能是什麼在這種情況下的問題？

感謝

Answer 1

試試這個代碼：

def createProcessTemplate: Action[AnyContent] = Action.async { implicit request => 
println(request.body.asJson) 
request.body.asJson.map(_.validate[ProcessTemplatesModel] match { 
    case JsSuccess(process, _) => 
    processTemplateDTO.createProcessTemplate(process).flatMap { 
     process => { 

     // Create process steps templates 
     createNewProcessStepTemplate(request, process.id.get) 


     // Create prerequisites 
     createProcessTemplatePrerequisite(request, process.id.get) 

     // Create postConditions 
     createProcessTemplatePostCondition(request, process.id.get) 

     processTemplateDTO.getProcessStepTemplates(process.id.get).map(
      steps => Ok(Json.obj("id" -> process.id, "title" -> process.title, "steps" -> steps))) 
     } 
    } 
    case JsError(_) => 
    Future.successful(BadRequest("Process Template not create client")) 
    case _ => Future.successful(BadRequest("Process Template create client")) 
}).getOrElse(Future.successful(BadRequest("Process Template create client"))) 

}

我已經關掉出現各地調用processTemplateDTO方法map和flatMap。在第一個中，您需要flatMap，因爲您返回Future，但在第二個中您實際上需要map，因爲您返回Result。