使 XForms 仅在填充字段时强制执行约束和类型模型项属性

发布于 2024-12-23 05:40:15 字数 431 浏览 3 评论 0原文

我有一个带有输入字段的简单 XForm，其中我已使用 required="false()" 属性指定该字段为可选字段。但是，我想向字段添加类型和约束属性以强制执行整数类型，并且整数必须大于 10，但前提是在字段中输入数据；毕竟，该字段是可选的。例如：

<xf:bind nodeset="testGreaterThanTen"
         required="false()"
         type="xs:integer"
         constraint=". &gt; 10"/>

我本以为 required="false()" 会胜过类型和约束属性，但我似乎错了；看来，包括类型和约束会强制填写该字段。根据 XForms 1.1 规范，这是正确的行为吗？无论如何，有没有办法在 XForms 中做我想做的事情？

谢谢！

原文

I have a simple XForm with an input field where I have specified the field to be optional with the required="false()" property. However, I would like add a type and constraint property to the field to enforce an integer type and that the integer must be greater than 10, but only if data is entered in the field; after all, the field is optional. For example:

<xf:bind nodeset="testGreaterThanTen"
         required="false()"
         type="xs:integer"
         constraint=". > 10"/>

I would have thought the required="false()" would trump the type and constraint properties, but I appear to be wrong; it appears that including the type and constraint forces the field to be filled out. Is this the proper behavior per the XForms 1.1 specification? Is there anyway to do what I want in XForms?

Thanks!

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