Question

Maybe this is an issue with persistance and the domain object. So I have a list of manual notes that can be added to a person. My person class looks similar to this (I’ve wrapped the object in transients to ignore persistence):

class Person {
...
List<String> notes = new ArrayList<String>()
...
}

When I update a person with a note (textfield on view will allow note to be added), I want to do something simple like adding the new note to the array list tied to the person:

class PersonController {
...
def update() {
    def contactInstance = Contact.get(params.id)
    if (!contactInstance) {
        flash.message = message(code: 'default.not.found.message', args: [message(code: 'contact.label', default: 'Contact'), params.id])
        redirect(action: "list")
        return
    }

    if (params.version) {
        def version = params.version.toLong()
        if (contactInstance.version > version) {
            contactInstance.errors.rejectValue("version", "default.optimistic.locking.failure",
                      [message(code: 'contact.label', default: 'Contact')] as Object[],
                      "Another user has updated this Contact while you were editing")
            render(view: "edit", model: [contactInstance: contactInstance])
            return
        }
    }

    contactInstance.properties = params

    /**
     * Check for inactive - Then flag with user and date tag
     */
    if(params.isActive == null) {
        DateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy HH:mm");
        Date date = new Date();
        contactInstance.properties.isActiveNote = "Made inactive by " + session.user + " on " + dateFormat.format(date) + "."
    }

    /**
     * Date stamp of the note itself
     */

    if(params.notes.equals("")) {}
    else {
        DateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy HH:mm");
        Date date = new Date();
        //contactInstance.properties.notes = contactInstance.properties.notes + "    " + params.notes + " - (" + dateFormat.format(date) + " " + session.user + ");"
        contactInstance.allThese.add(contactInstance.properties.notes)
        println(contactInstance.allThese)
    }


    if (!contactInstance.save(flush: true)) {
        render(view: "edit", model: [contactInstance: contactInstance])
        return
    }

    flash.message = message(code: 'default.updated.message', args: [message(code: 'contact.label', default: 'Contact'), contactInstance.id])
    redirect(action: "show", id: contactInstance.id)
}
...
}

The call to update from my gsp:

<g:actionSubmit class="save" action="update" value="${message(code:'default.button.update.label', default: 'Update')}" />

But it just seems to store the array with a single note. Is there a persistance issue with Grails domain objects and collections? It could very well be a simple issue on my end!

Thanks for all the help.

Answer 1

If your view includes multiple <input> fields or <textarea>s with the same name (“notes”, to match the field name in your Domain class), Grails will automatically bind the values to your notes array.

You might also look into the new params.list() method that would allow you to iterate through request parameters and then add them individually to your array.