CODEWITHSUNDEEP
grailsgrails-domain-class
ry1633
ry1633

Reputation: 463

Grails: how do bind domain classes with condition

I have two domain classes in Grails that will interact with corresponding form fields for state and country. Is there any way to conditionally bind them so that a user can't make the mistake of trying to submit something wrong. For instance, "Chicago, IL" would be valid, but "Chicago, Mexico" would be invalid. Would it be easier to do this within the gsp or the controller? Thanks for the help - this is something I haven't attempted before. 

class State {

    String name
    String value
    int orderNumber = 0

    static constraints = {
        name nullable:false, maxSize:50, blank:false
        value nullable:false, maxSize:100, blank:false
    }

    String toString(){
        "$name - $value"
    }

    static mapping = {
        table 'state'
        cache: 'read-write'
        columns{
            id column:'id'
            name column:'name'   //abbreviation
            value column:'value' //state name
            orderNumber column:'order_number'  // numerical list order
        }
        id generator: 'assigned'
    }
}

class Country {

    String name
    String value
    int orderNumber = 0

    static constraints = {
        name nullable:false, maxSize:50, blank:false
        value nullable:false, maxSize:100, blank:false
    }

    String toString(){
        "$name - $value"
    }

    static mapping = {
        table 'country'
        cache: 'read-write'
        columns{
            id column:'id'
            name column:'name'  //abbreviation
            value column:'value' // country name
            orderNumber column:'order_number'  // numerical list order
        }
        id generator: 'assigned'
    }
}

Form fields

<div class="col-sm-1">
    State<g:select name="State" from="" value="" class="form-control" type="text" label="state" required="true"/>
</div>

<div class="col-sm-2">
    Country<g:select name="Country" from="" class="form-control"  type="text" label="country" required="true"/>
</div>

Upvotes: 0

Views: 346

Answers (1)

Daniel Woods
Daniel Woods

Reputation: 1029

You will need to consume the form input into a command object, and have a custom validator on that command object with your validation logic. Plenty of good details in the docs.

Good luck!

Upvotes: 2

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