我正在使用 Grails 2.3.5，并且我有一个包含ajaxDelete方法的控制器。此方法接收名称作为我要删除的实体的字符串。我正在使用一项服务来删除我从控制器中调用的实体。
第一次调用服务deleteSvnUser方法时，SVN 用户被删除，并且我在页面上的 div 更新，并显示用户已被删除的警报。第二次删除用户时，出现以下错误：
row-was-updated-or-deleted-by-another-transaction-or-unsaved-value-mapping-was...
我已经尝试了几件事来解决这个问题：
- 将@transactional 注释添加到我的服务中（我不应该这样做，因为它应该是默认的事务性的）。
- 刷新我的删除（刷新：真）
- 在我删除实体之前刷新它（.refresh）
- 检索实体时锁定实体 (entity.lock(id))
以上都没有奏效。我不确定还能做些什么来解决这个问题。任何人都可以帮忙吗？我的代码如下：
控制器
class SvnUserController {
def svnUserService
def ajaxDelete() {
if (!params.selectedSvnUser) {
request.error = "The selected Svn User does not exist"
render(template:"svnUserList", model:[svnUserInstanceList: SvnUser.list(params).sort{it.name}, svnUserInstanceTotal: SvnUser.count()])
return
}
String outcome = svnUserService.deleteSvnUser(params.selectedSvnUser)
switch (outcome){
case "":
request.message = "Svn User ${params.selectedSvnUser} deleted"
break
default: request.error = outcome
}
}
def svnUsers = svnUserService.getAllSvnUsers(params)
render(template:"svnUserList", model:[svnUserInstanceList: svnUsers, svnUserInstanceTotal: svnUsers.size()])
return
}
}
服务
class SvnUserService {
public String deleteSvnUser(String userName) {
String outcome = ""
try {
SvnUser svnUserInstance = SvnUser.findByName(userName)
def groups = SvnGroupController.findAllBySvnUserName(userName)
groups.each { SvnGroup group ->
group.removeFromSvnUsers(svnUserInstance)
group.save()
}
def userPermissionsList = UserPermission.findAllBySvnUser(svnUserInstance)
userPermissionsList.each {
def repoDirectory = it.repositoryDirectory
repoDirectory.removeFromUserPermissions(it)
it.delete()
}
svnUserInstance.merge()
svnUserInstance.delete()
}
catch (DataIntegrityViolationException e) {
outcome = "A error occurred while attempting to delete the Svn User from file."
}
return outcome
}
}
堆栈跟踪如下：
Error |
2014-06-10 15:10:07,394 [http-bio-8080-exec-6] ERROR errors.GrailsExceptionResolver - StaleObjectStateException occurred when processing request: [POST] /subzero/svnUser/ajaxDelete - parameters:
selectedSvnUser: ruby2
Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.uk.nmi.subzero.SvnGroup#2]. Stacktrace follows:
Message: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.uk.nmi.subzero.SvnGroup#2]
Line | Method
->> 72 | deleteSvnUser in com.uk.nmi.subzero.SvnUserService
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 87 | ajaxDelete in com.uk.nmi.subzero.SvnUserController
| 200 | doFilter . . in grails.plugin.cache.web.filter.PageFragmentCachingFilter
| 63 | doFilter in grails.plugin.cache.web.filter.AbstractFilter
| 1145 | runWorker . . in java.util.concurrent.ThreadPoolExecutor
| 615 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 744 | run . . . . . in java.lang.Thread