For example, suppose you have to render a dynamic form and hide input fields based on user permissions.

例如，假设您不得不呈现一个动态表单，并隐藏基于用户权限的输入字段。

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If so, you use Groovy scripting to generate a structure with the required Atom fields and render it.

如果是，您可以使用groovy脚本生成具有Atom字段的结构，并呈现这个结构。

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Both the Struts version and the Rails version handle a validation error in the same way: Render the page again, with error messages marking the form fields that need to be corrected.

Struts和Rails采用了同样的方式来处理验证错误：重新渲染相应的页面，并将需要改正的表单输入域用错误信息标识出来。

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