The Grails Framework 3.1.1

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(Quick Reference) # withForm ## Purpose Used to handle duplicate form submissions. ## Examples
    withForm {
       // good request
    }.invalidToken {
       // bad request
    }
## Description The `withForm` method requires the use of the `useToken` attribute in a form
    <g:form useToken="true" ...>
Then in your controller code you can use the `withForm` method to handle valid and invalid requests:
    withForm {
       // good request
    }.invalidToken {
       // bad request
    }
See Handling Duplicate Form Submissions for more information. | Quick Reference (hide)