grails验证嵌套的命令对象不能正常工作

Question

我正在使用grails 2.2.1并尝试验证嵌套的命令结构。这是我的命令对象的一个​​简化版本：

@Validateable 
class SurveyCommand { 

    SectionCommand useful 
    SectionCommand recommend 

    SurveyCommand() { 
     useful = new SectionCommand(
       question: 'Did you find this useful?', 
       isRequired: true) 
     recommend = new SectionCommand(
       question: 'Would you recommend to someone else?', 
       isRequired: false) 
    } 
} 

@Validateable 
class SectionCommand { 
    String question 
    String answer 
    boolean isRequired 

    static constraints = { 
     answer(validator: answerNotBlank, nullable: true) 
    } 

    static answerNotBlank = { String val, SectionCommand obj -> 
     if(obj.isRequired) { 
      return val != null && !val.isEmpty() 
     } 
    } 
} 

当我尝试验证的SurveyCommand一个实例，它总是返回true不管段值和SectionCommand（answerNotBlank）我自定义的验证永远不会被调用。从grails文档看来，this kind of nested structure is supported（deepValidate默认为true）。但是，也许这个规则只适用于域对象而不是Command对象？或者我在这里错过了什么？

Answer 1

你可以自定义验证程序添加到您的主命令对象

@Validateable 
class SurveyCommand { 

    SectionCommand useful 
    SectionCommand recommend 

    static subValidator = {val, obj -> 
     return val.validate() ?: 'not.valid' 
    } 

    static constraints = { 
     useful(validator: subValidator) 
     recommend(validator: subValidator) 
    } 

    SurveyCommand() { 
     useful = new SectionCommand(
      question: 'Did you find this useful?', 
      isRequired: true) 
     recommend = new SectionCommand(
      question: 'Would you recommend to someone else?', 
      isRequired: false) 
    } 
} 

Answer 2

如果您尝试使用mockForConstraintsTest()，那么你应该在Config.groovy注册command对象来测试validation从unit测试，而不是因为一个使用@Validateable现有的Grails Bug。详情请参考SO question/answers。

可以在Config.groovy

grails.validateable.classes = 
      [yourpackage.SurveyCommand, yourpackage.SectionCommand] 

Answer 3

Grails的2.3注册为以下validateable类，后来我发现，Cascade Validation Plugin很好地解决了这个问题。它定义了一个名为级联的新验证器类型，它完全符合您的期望。一旦安装你的例子就会变成：

class SurveyCommand { 
    ... 

    static constraints = { 
     useful(cascade: true) 
     recommend(cascade: true) 
    } 
}