grails为hasErrors添加验证错误 [英] grails add validation error to hasErrors

问题描述

我想知道如何将自定义错误添加到hasErrors方法，以便gsp发现错误。我的代码到目前为止。

  def recoverySetup = new RecoverySetup（params）
 $ b $ def onesolOrgkey = OnesolOrgkeyInfo。 get（new OnesolOrgkeyInfo（params））; 
 $ b $ if（onesolOrgkey！= null）{
 recoverySetup.setOneSolOrgkey（onesolOrgkey）
} else {
 recoverySetup.errors.reject（'orgkey'，'You must提供有效的组织键'）
} 
 
 recoverySetup.validate（）
 
 if（recoverySetup.hasErrors（））{
 render view：' create'，model：[recoverySetupInstance：recoverySetup] 
 return 
} 
  

解决方案

正如Danilo所说，您可能希望为您的域类添加一个约束来为您做。

了解有关约束的更多信息 http://grails.github.io/grails-doc /2.2.x/guide/single.html#constraints 和 http://grails.github.io/grails-doc/2.2.x/ref/Constraints/Usage.html 。

如果无论出于什么原因你真的想要t o添加约束无法涵盖的自定义错误（我现在无法想象一个案例，但这并不意味着它不存在:-)，您仍然可以以非常类似于你发布：

$ pre $实例.errors.rejectValue（fieldName，errorCode，message，defaultMessage）
instance.errors.reject （errorCode，message，defaultMessage）

第一个拒绝一个具体的字段，通常是第二个bean。但请牢记当您再次调用 validate 时，此错误将被重置。

另外，您可以在grails中自动显示错误：

 < g：hasErrors bean =$ {instance }> 
< g：renderErrors bean =$ {instance}/> 
< / g：hasErrors> 
  

查看所有选项： https://grails.github.io/grails-doc/2.2.x/ref/Tags/hasErrors.html

I'd like to know how to add a custom error to the hasErrors method so that the gsp picks up the error. My code thus far.

def recoverySetup = new RecoverySetup(params)

def onesolOrgkey = OnesolOrgkeyInfo.get(new OnesolOrgkeyInfo(params));

if(onesolOrgkey != null) {
    recoverySetup.setOneSolOrgkey(onesolOrgkey)
} else {
    recoverySetup.errors.reject('orgkey', 'You must provide a valid Org Key')
}

recoverySetup.validate()

if(recoverySetup.hasErrors()) {
    render view: 'create', model: [recoverySetupInstance: recoverySetup]
    return
}

解决方案

As Danilo says, you probably want to add a constraint to your domain class to do that for you.

Learn more about constraints in http://grails.github.io/grails-doc/2.2.x/guide/single.html#constraints and http://grails.github.io/grails-doc/2.2.x/ref/Constraints/Usage.html .

If for whatever reason you really want to add a custom error that cannot be covered by the constraints (I can't imagine a case right now, but that doesn't mean it doesn't exists :-), you can still do it in a very similar fashion of what you posted:

instance.errors.rejectValue(fieldName, errorCode, message, defaultMessage)
instance.errors.reject(errorCode, message, defaultMessage)

The first rejects a concrete field, the second the bean in general. But bear in mind this errors will be reset when you invoke validate again.

Also, you can display the errors of a bean automatically in grails with:

<g:hasErrors bean="${instance}">
   <g:renderErrors bean="${instance}" />
</g:hasErrors>

See all the options here: https://grails.github.io/grails-doc/2.2.x/ref/Tags/hasErrors.html

这篇关于grails为hasErrors添加验证错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！