Grails 对 int 列的约束抛出 java.lang.IllegalArgumentException
我对两个整数 Score 和 numOfQuestions 有以下约束。
score blank:false, min:1, nullable:false, notEqual:null
numOfQuestions blank:false, min:1, nullable:false, notEqual:null
可以看出，我希望这些字段大于 0 并且不应该为空或空白，但无论我做什么，而不是显示一条友好的消息，如“属性不能为空”，我的屏幕上会充满长异常。 .. 还有其他方法可以验证非空白输入的整数吗？
Failed to convert property value of type java.lang.String to required type int for property numOfQuestions; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [java.lang.String] to required type [int] for property numOfQuestions: PropertyEditor [org.springframework.beans.propertyeditors.CustomNumberEditor] returned inappropriate value of type [null]
我看过这个 http://jira.grails.org/browse/GRAILS-4603但没有多大帮助
I have following constraints on two integers, score and numOfQuestions.
score blank:false, min:1, nullable:false, notEqual:null
numOfQuestions blank:false, min:1, nullable:false, notEqual:null
As it can be seen I want these fields to be greater then 0 and should not be null or blank but regardless of what I do, rather then showing a friendly message like "property can not be blank" my screen gets filled with long exception...
Is there any other way to validate integers for non blank inputs?
Failed to convert property value of type java.lang.String to required type int for property numOfQuestions; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [java.lang.String] to required type [int] for property numOfQuestions: PropertyEditor [org.springframework.beans.propertyeditors.CustomNumberEditor] returned inappropriate value of type [null]
I have seen this http://jira.grails.org/browse/GRAILS-4603 but didn't help much
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我认为您可以将上面的约束替换为：
因为
min:1意味着 not-null。约束blank: false只能应用于String属性，因此您将此约束与数字属性一起使用可能会导致您看到的异常。I think you can replace the constraints above with just:
Because
min:1implies not-null. The constraintblank: falsecan only be applied toStringproperties, so you're use of this constraint with a numeric property is probably responsible for the exception you're seeing.