How is it possible to combine a request into two different domains (w. has-many /belongs-to relationship)

[Mark Nellemann]

Dear Grails users,

Looking for advice :)

I am trying to accomplish this: Submit a form with text-field “subject” and text-area “content”, which (if validated) creates 1 new Ticket and 1 Article that belongs to the Ticket just created.

I think I need to create a Command Object w. the combined properties (for validation), but how do I persist the command object into Ticket and Article ?

Simplified, I have the following domains;

# Domain Class: Ticket

class Ticket {

     String title  // Should be set to the subject of 1st Article when saved

     static hasMany = [ articles: Article ]

     static constraints = {

          title(maxSize: 128)

     }

}

# Domain Class: Article

class Article {

     String subject

     String content

     static belongsTo = [ ticket: Ticket ]

     static constraints = {

          subject()

          content()

     }

}

Help is greatly appreciated,

Mark

[Søren Berg Glasius]

Hi Mark,

if your params contains:

params.title

params.subject

params.content

you could do

class SomeController {

    def save(Article article) { // This would instantiate an Article object and bind content & subject

         def ticket = new Ticket(title: params.title)

         ticket.validate()

         if(article.hasErrors() || ticket.hasErrors()) {

                render(view: 'create', model: [articleInstance: article, ticketInstance: ticket]

                return

         }

         article.save()

         ticket.addToArticles(article)

         ticket.save(flush: true)

         

         flash.message = "Saved Ticket (title: $ticket.title) with Article (subject: $article.subject)"

         redirect(action: 'show', id: title.id)

   }

}

or something like this.

Hope you can use this as inspiration. Assumption is that you use Grails 2.4.4. Disclaimer: I have not run this code, it's from memory.

Best regards / Med venlig hilsen,
Søren Berg Glasius

40 Stevenson Ave, Berkeley, CA 94708
Mobile: (+1)510 984 8362, Skype: sbglasius
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[Mark Nellemann]

Hej Søren,

Thanks, it got me in the right direction :)

Br,

Mark