grails - grails重定向中的异常

Question

嗨，我正在尝试使用重定向，redirect(uri: "/errors/handle500")但出现以下异常

Cannot issue a redirect(..) here. A previous call to redirect(..) has already redirected the response.. Stacktrace follows:
  org.codehaus.groovy.grails.web.servlet.mvc.exceptions.CannotRedirectException: Cannot issue a redirect(..) here. A previous call to redirect(..) has already redirected the response.
  at com.cisco.rms.ErrorsController$_closure1.doCall(ErrorsController.groovy:8)
2012-10-03 18:05:53,414 [http-bio-8080-exec-7] ERROR errors.GrailsExceptionResolver  - CannotRedirectException occurred when processing request: [GET] /rmsportal/changeRequest/listJSONFromService 

谁能告诉我为什么它没有重定向。

Answer 1

tim_yates 是对的，你不能调用第二个重定向。也许您想改用forward，并记住仅重定向并不能阻止 grails 执行其余的控制器代码。

Answer 2

这是我的错误样本。

if (checkSomething){
    redirect action: 'foo'
}
....
redirect action: 'bar'

这是正确的样本

if (checkSomething){
    redirect action: 'foo'
    return
}
....
redirect action: 'bar'