grails，row已被另一个事务更新或删除

Question

我试图在我的控制器update方法中调用一些服务。不幸的是，这导致StaleObjectStateException，我真的不知道为什么，因为我只是＆＃34;只是＆＃34;调用transactional

的服务方法

以下是例外：

| Error 2015-06-21 15:43:43,091 [http-bio-8080-exec-7] ERROR errors.GrailsExceptionResolver  - StaleObjectStateException occurred when processing request: [PUT] /time-tracking-backend/projectBooking/update/1 - parameters:
date: struct
duration: 120
date_year: 2015
date_month: 6
project.id: 1
_method: PUT
_action_update: Aktualisieren
comment: jojo
date_day: 21
version: 0
subProject.id: 2
Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect) : [projectmanagement.SubProject#2]. Stacktrace follows:
Message: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect) : [projectmanagement.SubProject#2]
    Line | Method
->>   48 | $tt__setActualHours in projectmanagement.ProjectService$$EPGFZqxM
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|    201 | $tt__update         in timemanagement.ProjectBookingController$$EPGFYoBE
|    198 | doFilter . . . . .  in grails.plugin.cache.web.filter.PageFragmentCachingFilter
|     63 | doFilter            in grails.plugin.cache.web.filter.AbstractFilter
|     53 | doFilter . . . . .  in grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter
|    139 | doFilter            in grails.plugin.springsecurity.rest.RestAuthenticationFilter
|     49 | doFilter . . . . .  in grails.plugin.springsecurity.web.authentication.RequestHolderAuthenticationFilter
|     82 | doFilter            in grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter
|     80 | doFilter . . . . .  in grails.plugin.springsecurity.rest.RestLogoutFilter
|     82 | doFilter            in com.brandseye.cors.CorsFilter
|   1142 | runWorker . . . . . in java.util.concurrent.ThreadPoolExecutor
|    617 | run                 in java.util.concurrent.ThreadPoolExecutor$Worker
^    745 | run . . . . . . . . in java.lang.Thread
......

..和我的控制器更新方法中的重要部分：

if(projectBookingInstance.getPersistentValue("subProject") != projectBookingInstance.subProject
        || projectBookingInstance.getPersistentValue("date") != projectBookingInstance.date){

            ProjectBooking projectBookingToBeUpdated = ProjectBooking.get(projectBookingInstance.id)

            if(projectBookingToBeUpdated != null){

                projectService.deleteActualHours(projectBookingToBeUpdated)

                projectBookingToBeUpdated.delete(flush:true)
                projectService.setActualHours(projectBookingToBeUpdated)
                projectBookingInstance.save(flush:true)
                return
            }
        }

两种服务方式：

def deleteActualHours(ProjectBooking projectBookingInstance){

        Project project = projectBookingInstance.project
        SubProject subProject = projectBookingInstance.subProject

        Double duration = projectBookingInstance.duration / 60
        duration = duration.round(2)

        project.actualHours -= duration     
        subProject.actualHours -= duration

        project.save(flush:true)
        subProject.save(flush:true)     
    }


def setActualHours(ProjectBooking projectBookingInstance){

        Project project = projectBookingInstance.project
        SubProject subProject = projectBookingInstance.subProject

        Double duration = (projectBookingInstance.duration/60)
        duration = duration.round(2)

        project.actualHours += duration
        subProject.actualHours += duration

        project.save(flush:true)
        subProject.save(flush:true)
    }