Grails command object binding if it doesn't satisfy constraints

Question

Can I bind default field if it doesn't satisfy constraints? Suppose I have

class MyCommand {
    String tag = "defaultTag"

    static constraints = {
        tag inList: ['a', 'b']
    }
}

When users passes ?tag=myHackieTag I don't wanna check is command object valid - just use default value (defaultTag)

Tomas Lin · Accepted Answer · 2013-01-28 12:40:13Z

1

You could create your own set of getter setter methods for this, no?

class MyCommand {
    String tagValue

    void setTag( value ){
        tagValue = value in ['a', 'b' ] ? value : 'defaultTag'
    }

    String getTag(){
        tagValue
    } 
}

Not sure how this works with the new bindable stuff in grails 2.

answered Jan 28, 2013 at 12:40

Tomas Lin

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Comments

hitty5 · Accepted Answer · 2013-01-28 11:53:35Z

0

you can validate a single parameter, e.g.

if (!myCommand.validate(['tag'])) {
     // provide your default value when validation fails
     myCommand.tag = "defaultTag"
}

answered Jan 28, 2013 at 11:53

hitty5

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1 Comment

fedor.belov Over a year ago

Thanks for solution but it will require a lot of additional boilerplate code. Can I make this behaviour by default?

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