CODEWITHSUNDEEP
grails
CIF
CIF

Reputation: 1774

Grails: Dynamically change domain's constraints in controller

I'm a Grails beginner. I have a Domain class which has domainName field in Grails (ver. 2.0.1). In my DomainConstraints.groovy, I have:

constraints = {
    domainName blank: false, matches: "^([^.]{0,63}\\.)*([^.]{1,63})\$"
}

but depending on some situation, i want to make this domainName field "blank: true" or "blank: false". I'm not validating my domain class against the actual database, so sync with the domain class and the actual table is not an issue.

So, I want to do something like this (code below is from my imagination):

if(something){
   Domain.constraints.removeAttr('blank')
} else {
   Domain.constraints.addAttr('blank', 'true')
}

Is this possible?

Upvotes: 1

Views: 1463

Answers (1)

chrislatimer
chrislatimer

Reputation: 3560

You could do something like this:

class DomainConstraints {
  Boolean validateBlankFlag
  String domainName
  static transients = [validateBlankFlag]

  static constraints = {
    domainName validator :  { val,obj -> !val?.equals("") || !obj.validateBlankFlag}

  }
}

Then just set the validateBlankFlag on the domain object depending on whether you want to allow blank values or not. You may not even need the validateBlankFlag property if you can make the decision based on other property values within the DomainConstraints object.

Upvotes: 2

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