我在scala playframework项目中有一些复杂的模型。我必须做一些数据库请求,然后我必须为模型分配新的值。
整个方法如下:
def getEditProcessTemplateData(processTemplateId: Int): Action[AnyContent] = Action.async {
//Get all steps of this process templates
val stepIds: Future[Seq[Int]] = processTemplateDTO.getProcessStepTemplateIds(processTemplateId)
val process = for {
allApprovedProcessTemplates <- processTemplateDTO.getApprovedProcessTemplates //Get all approved process templates
processTemplate <- processTemplateDTO.getProcessTemplate(processTemplateId) // Get the Process Template
prerequisites <- getProcessTemplateForEdit(processPrerequisitesDTO.getProcessPrerequisiteProcessTemplateIdsByProcessTemplateId(processTemplateId))
postConditions <- getProcessTemplateForEdit(processPostConditionsDTO.getProcessPostConditionProcessTemplateIdsByProcessTemplateId(processTemplateId))
approvedProcessTemplate <- processTemplateDTO.getProcessTemplate(processTemplate.get.approveprocess)
trainedProcessTemplate <- processTemplateDTO.getProcessTemplate(processTemplate.get.trainingsprocess)
processSteps <- processTemplateDTO.getProcessStepTemplates(processTemplateId)
// Step prerequisites
processStepsPrerequisites <- getProcessStepsPrerequisites(stepIds)
processStepsPrerequisiteProcessTemplate <- getProcessStepsPrerequisiteProcessTemplate(stepIds)
processTemplatesForStepPrerequisites <- getProcessTemplateForStepPrerequisite(stepIds)
// Step post conditions
processStepsPostConditions <- getProcessStepsPostConditions(stepIds)
processStepPostConditionProcessTemplate <- getProcessStepPostConditionProcessTemplate(stepIds)
processTemplatesForStepPostConditions <- getProcessTemplateForStepPostCondition(stepIds)
// Derived processes
derivedProcesses <- getDerivedProcesses(stepIds)
processTemplatesForStepDerivedProcesses <- getProcessStepsDerivedProcesses(stepIds)
// Process to process step
processStepsTemplates_ProcessTemplates <- getProcessStepsTemplates_ProcessTemplates(stepIds)
processTemplatesForProcessTemplatesToProcessStep <- getProcessTemplateToProcessStepId(stepIds)
responsible <- raciProcessTemplateDTO.getResponsibleProcessTemplates(processTemplateId) // get all responsibles for this process template
accountable <- raciProcessTemplateDTO.getAccountableProcessTemplates(processTemplateId) // get all accountables for this process template
consulted <- raciProcessTemplateDTO.getConsultedProcessTemplates(processTemplateId) // get all consulted for this process template
informed <- raciProcessTemplateDTO.getInformedProcessTemplates(processTemplateId) // get all consulted for this process template
} yield (allApprovedProcessTemplates, processTemplate, prerequisites, postConditions, processSteps, processStepsPrerequisites,
processStepsPrerequisiteProcessTemplate, processTemplatesForStepPrerequisites, processStepsPostConditions, processStepPostConditionProcessTemplate, processTemplatesForStepPostConditions, derivedProcesses,
processTemplatesForStepDerivedProcesses, processStepsTemplates_ProcessTemplates, processTemplatesForProcessTemplatesToProcessStep, approvedProcessTemplate, trainedProcessTemplate, responsible, accountable, consulted, informed)
process.map({ case (allApprovedProcessTemplates, processTemplate, prerequisites, postConditions, processSteps, processStepsPrerequisites,
processStepsPrerequisiteProcessTemplate, processTemplatesForStepPrerequisites, processStepsPostConditions, processStepPostConditionProcessTemplate, processTemplatesForStepPostConditions, derivedProcesses,
processTemplatesForStepDerivedProcesses, processStepsTemplates_ProcessTemplates, processTemplatesForProcessTemplatesToProcessStep, approvedProcessTemplate, trainedProcessTemplate, responsible, accountable, consulted, informed) =>
processSteps.map{ psteps: Seq[ProcessStepTemplatesModel] =>
Future.sequence(psteps.map {
step => {
val prerequisiteFuture = processStepPrerequisitesDTO.getProcessStepPrerequisiteIdsByProcessTemplateIdSeq(step.id.get)
prerequisiteFuture.map(prereqs => step.copy(prerequisites = Some(prereqs)))
}
})
}
Ok(Json.obj(
"allApprovedProcessTemplates" -> allApprovedProcessTemplates,
"processTemplate" -> processTemplate,
"prerequisites" -> prerequisites,
"postConditions" -> postConditions,
"approvedProcessTemplate" -> approvedProcessTemplate,
"trainedProcessTemplate" -> trainedProcessTemplate,
// Step prerequisites
"processStepsPrerequisites" -> processStepsPrerequisites,
"processStepsPrerequisiteProcessTemplate" -> processStepsPrerequisiteProcessTemplate,
"processTemplatesForStepPrerequisites" -> processTemplatesForStepPrerequisites,
// Step post conditions
"processStepsPostConditions" -> processStepsPostConditions,
"processStepPostConditionProcessTemplate" -> processStepPostConditionProcessTemplate,
"processTemplatesForStepPostConditions" -> processTemplatesForStepPostConditions,
// Derived processes
"derivedProcesses" -> derivedProcesses,
"processTemplatesForStepDerivedProcesses" -> processTemplatesForStepDerivedProcesses,
// Process to process step
"processStepsTemplates_ProcessTemplates" -> processStepsTemplates_ProcessTemplates,
"processTemplatesForProcessTemplatesToProcessStep" -> processTemplatesForProcessTemplatesToProcessStep,
"steps" -> processSteps,
"responsible" -> responsible,
"accountable" -> accountable,
"consulted" -> consulted,
"informed" -> informed
))
})
}
我遇到问题的代码部分是:
processSteps.map{ psteps: Seq[ProcessStepTemplatesModel] =>
Future.sequence(psteps.map {
step => {
val prerequisiteFuture = processStepPrerequisitesDTO.getProcessStepPrerequisiteIdsByProcessTemplateIdSeq(step.id.get)
prerequisiteFuture.map(prereqs => step.copy(prerequisites = Some(prereqs)))
}
})
}
我收到了这个错误:
found : Seq[models.ProcessStepTemplatesModel] => scala.concurrent.Future[Seq[models.ProcessStepTemplatesModel]]
required: models.ProcessStepTemplatesModel => ?
[error] processSteps.map{ psteps: Seq[ProcessStepTemplatesModel] =>
我该如何解决这个问题?
谢谢!
答案 0 :(得分:1)
我认为您已经安装了所需的代码,只需要进行一些小修改:
Future.sequence {
processSteps.map { step =>
val prerequisiteFuture = processStepPrerequisitesDTO.getProcessStepPrerequisiteIdsByProcessTemplateIdSeq(step.id.get)
prerequisiteFuture.map(prereqs => step.copy(prerequisites = Some(prereqs)))
}
}