Grails Domain Validation

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Had a interesting need to do validation on two fields and ensure one or the other had (valid) input.

Here’s what the code looks like:

class Resource { String url String data static hasMany = \[views:View\] static constraints = { url(nullable: true, url: true, validator: { val, obj -\> if (obj.url null && obj.data null) return \[‘url OR data required.’\] }) data(nullable: true, maxSize:5000, validator: { val, obj -\> if (obj.data null && obj.url null) return \[‘url OR data required.’\] }) } String toString() { this.id } } </filter:code> Nothing spectacular…just simple.

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