Grails：如何在不使用g:view的情况下读取错误（在控制器/服务中）

Posted 2021-02-26

how to read error message as string instead of complicated codes. usually people using taglib to read error messages. but how to read it in controller/service if you, for example, want to log or render just the message. here is how to do that.

// in controller/services :
class GrailsService { 
    boolean transactional = true
    def messageSource ; 
 
    def locale = Locale.getDefault()
  domainObj.errors.each { fieldErrors ->
     fieldErrors.allErrors.each { error ->
        log.warn messageSource.getMessage(error, locale)
     }
  }
 
}