Using a command object boolean with a input:checkbox in grails

Question

This is probably a ridiculously easy question, but I've been struggling with it nonetheless.

I have a form:

.
.
.
<g:form controller='somecontroller' action='someaction'>
    <g:textField name='name'/>
    <g:checkBox name='active'/>
    <g:submitButton name='save'/>
</g:form>
.
.
.

And I have a command object:

class MyCommandObject{

    String name
    Boolean active

    static constraints{
        .
        .
        .
    }
}

When I try to access the active property of the command object in my controller, it's always false. The name property, however, is being properly populated. I've tried changing the value to true, and also ${true} (as I saw in some example) and none seem to work. What am I doing wrong here?

Edit: How I'm binding to the command object in the controller:

class MyController{

    .
    .
    .

    def save(MyCommandObject cmd){

        // Do validation/error checking

        def myDomainObject = new DomainObject()

        myDomainObject.name = cmd.name
        myDomainObject.active = cmd.active

        // Do something with myDomainObject

    }

}

I've also tried the style:

def save = { MyCommandObject cmd ->

    .
    .
    .
}

How are you binding to the command object in the controller? — Kelly
You are right - this should be and usually is simple. I've just verified both of these methods on Grails 2.0.4 and the second method on 1.3.7. Both print true or false correctly when I println cmd.active doing exactly what you are. Have you tried a grails clean - not sure what else to try. Everything you've done looks fine as long as your actual form has the correct controller and action and no typo's your demo form above doesn't show. — Kelly
@Kelly thanks for investigating. The strange thing is that all of the other fields work, just not checkbox / boolean fields. — aasukisuki
Follow-up: I did a grails clean as suggested by @Kelly and that corrected the issue. If you want to answer the question with that, I'll accept it. — aasukisuki

Kelly Kelly · Accepted Answer · 2012-07-19T22:28:22

Everything you've done looks fine and I've verified as working in 1.3.7 and 2.0.4.

Please do a grails clean and try again.

Using a command object boolean with a input:checkbox in grails

1 Answers