Question

我在控制器内部的非常简单的更新操作中使用grails validate（）函数。问题非常严重。 validate（）根本没有执行，没有错误并且停止执行。我使用的是Grails 2.3.3

只有日志会出现以下错误：

Runtime error executing action

这是我的控制器代码：

def update() { 

        println(params);

        def study = Study.findByUid(params.uid);
        study.description = params.description;

        println(study); //study is found and printed  
        study.validate();
        println("here"); //not executed and code below is also not executed

        if(study.hasErrors()){
            study.errors.each{
                println it
            }
            render 'not saved!'
        }

        if (!study.save()) {

            println("Error");
            withFormat renderInternalError
        }
        else {

            render "OK"
        }
    }

Stacktrace：

Request received for '/study/update':

org.apache.catalina.connector.RequestFacade@1eaba95c

servletPath:/study/update
pathInfo:null

Security filter chain: [
  SecurityContextPersistenceFilter
  MutableLogoutFilter
  RequestHolderAuthenticationFilter
  SecurityContextHolderAwareRequestFilter
  GrailsRememberMeAuthenticationFilter
  GrailsAnonymousAuthenticationFilter
  ExceptionTranslationFilter
  FilterSecurityInterceptor
]


************************************************************


2013-11-27 11:56:04,738 [http-bio-8080-exec-9] DEBUG filter.GrailsRememberMeAuthenticationFilter  - SecurityContextHolder not populated with remember-me token, as it already contained: 'org.springframework.security.authentication.UsernamePasswordAuthenticationToken@f6816ea3: Principal: grails.plugin.springsecurity.userdetails.GrailsUser@b29dace9: Username: creator@example.com; Password: [PROTECTED]; Enabled: true; AccountNonExpired: true; credentialsNonExpired: true; AccountNonLocked: true; Granted Authorities: ROLE_USER; Credentials: [PROTECTED]; Authenticated: true; Details: org.springframework.security.web.authentication.WebAuthenticationDetails@1c07a: RemoteIpAddress: 127.0.0.1; SessionId: A1813ED8541AAC773CEF349475DB24A2; Granted Authorities: ROLE_USER'
2013-11-27 11:56:04,738 [http-bio-8080-exec-9] DEBUG filter.GrailsAnonymousAuthenticationFilter  - SecurityContextHolder not populated with anonymous token, as it already contained: '{0}'
2013-11-27 11:56:04,740 [http-bio-8080-exec-9] TRACE intercept.AnnotationFilterInvocationDefinition  - new candidate for '{0}': '{1}':{2}
2013-11-27 11:56:04,740 [http-bio-8080-exec-9] TRACE intercept.AnnotationFilterInvocationDefinition  - config for '{0}' is '{1}':{2}
2013-11-27 11:56:04,741 [http-bio-8080-exec-9] TRACE core.StandardWrapper  -   Returning non-STM instance
2013-11-27 11:56:04,743 [http-bio-8080-exec-9] DEBUG simple.MemoryPageFragmentCachingFilter  - No cacheable annotation found for POST:/hdspro/grails/study/update.dispatch [controller=study, action=update]
2013-11-27 11:56:05,651 [http-bio-8080-exec-9] DEBUG errors.GrailsExceptionResolver  - Resolving exception from handler [org.codehaus.groovy.grails.web.servlet.mvc.SimpleGrailsController@98f1784]: org.codehaus.groovy.grails.web.servlet.mvc.exceptions.ControllerExecutionException: Executing action [update] of controller [com.digithurst.hdspro.StudyController]  caused exception: Runtime error executing action
2013-11-27 11:56:05,651 [http-bio-8080-exec-9] DEBUG errors.GrailsExceptionResolver  - Resolving to view '/error' for exception of type [org.codehaus.groovy.grails.web.servlet.mvc.exceptions.ControllerExecutionException], based on exception mapping [java.lang.Exception]
2013-11-27 11:56:05,651 [http-bio-8080-exec-9] DEBUG errors.GrailsExceptionResolver  - Exposing Exception as model attribute 'exception'
2013-11-27 11:56:05,951 [http-bio-8080-exec-9] ERROR errors.GrailsExceptionResolver  - StackOverflowError occurred when processing request: [POST] /hdspro/study/update - parameters:
acessionNumber: 3
uid: 3
description: Elbogen123
Stacktrace follows:
org.codehaus.groovy.grails.web.servlet.mvc.exceptions.ControllerExecutionException: Executing action [update] of controller [com.digithurst.hdspro.StudyController]  caused exception: Runtime error executing action
    at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:200)
    at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
    at grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter.doFilter(GrailsAnonymousAuthenticationFilter.java:53)
    at grails.plugin.springsecurity.web.authentication.RequestHolderAuthenticationFilter.doFilter(RequestHolderAuthenticationFilter.java:49)
    at grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter.doFilter(MutableLogoutFilter.java:82)
    at grails.plugin.springsecurity.web.filter.DebugFilter.invokeWithWrappedRequest(DebugFilter.java:102)
    at grails.plugin.springsecurity.web.filter.DebugFilter.doFilter(DebugFilter.java:69)

......

/

Study class:
class Study extends Document {

    String uid
    String description
    String accessionNumber
    Date date

    String toString(){
        return "Study" + uid + ": " + description;
    }
}

Answer 1

从我读过的评论中，您说您没有向域类添加任何约束。据我所知validate()使用这些约束来检查您的实例是否有错误。例如：

class CartType {
    String name
    static constraints = {
         name blank: false, nullable:false, maxSize: 50 
    }

    String toString(){name}
}

在这个示例类中，我们有一个cartType。当我们调用validate() grails将检查约束块。在这种情况下，它将检查表单中的名称是否为空，它不能为空，并且它的最大大小为50个字符。

注意：约束块也可以帮助grails构建数据库。

如果您没有声明任何约束，validate()将无法检查任何内容。当值为null时，您很可能会收到错误，因为默认情况下，nullable设置为false。

Grails验证运行时错误

1 个答案: