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SurveyCommand的实例时，无论部分值如何，它总是返回true，并且SectionCommand（answerNotBlank）中的自定义验证器永远不会被调用。从grails文档中，似乎this kind of nested structure is supported（deepValidate默认为true）。但是，这个规则可能只适用于域对象而不适用于Command对象？或者我在这里错过了什么？

Answer 1

对于Grails 2.3及更高版本，我发现Cascade Validation Plugin很好地解决了这个问题。它定义了一个名为cascade的新验证器类型，它完全符合您的期望。安装完成后，您的示例将变为：

class SurveyCommand {
    ...

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

Answer 2

您可以将自定义验证程序添加到主命令对象

@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 3

如果您尝试使用validation从unit测试中测试mockForConstraintsTest()，那么您应该在command中注册Config.groovy个对象，而不是使用{{1}因为现有的Grails Bug。有关详细信息，请参阅此SO question/answers。

您可以在@Validateable

中注册可验证课程，如下所示

Config.groovy

grails验证嵌套命令对象不起作用

3 个答案: