相关疑难解决方法(0)

我知道如何使用UrlMappings在Grails中进行通用异常处理,并使用ErrorController进行泛型异常处理,这样如果异常转义控制器,用户将被发送到通用错误页面并记录异常.我也知道如何使用try/catch块来处理特定异常并尝试从中恢复.

但是在大多数控制器中,如果发生异常,我只想给用户一个稍微更具体的错误消息.所以在创建操作中,我想告诉用户该项目未创建.或者在导入操作中,我想告诉用户导入失败.现在,控制器看起来像:

class ThingController {
  def create = {
    try {
      // The real controller code, which quickly hands it off to a service
    } catch (Exception e) {
      handleException(e, "There was an error while attempting to create the Thing")
    }
  }

  def delete = {
    try {
      // The real controller code, which quickly hands it off to a service
    } catch (Exception e) {
      handleException(e, "There was an error while attempting to delete the Thing")
    }
  }

  private …