Question

I would like to ask if its possible to have a closure to the rendering form and validation of inputs then let the other controller to the persistence? I am pertaining to this line of code below:

def create() {
    if(params.size() <= 2) {
        [modelInstance: new <Domain>()]
    } else {
        def model = new <Domain>(params)
        if(!model.validate()) {
            render(view:"create", model: [modelInstance: model])
            return
        } else {
            chain(action:"save", model: [modelInstance: model])
        }
    }
}

def save() {
//  where the modelInstance object was created from the create closure
    if (!modelInstance.save(flush: true)) {
        render(view: "create", model: [modelInstance: modelInstance])
        return
    }

    flash.message = "Sucess!"
    redirect(action: "show", model: [modelInstance: modelInstance])
}

Note: The second closure save doesn’t have a .gsp file to render, what it
only does is do the persistence then redirect the process either pass
or fail.

When I use the first modelIstance in the save closure, the page return an HTTP 405 error. This is a result because we couldn’t locate the model object, yet we used the chain method?

Answer 1

It looks like you’re trying to use chain where a private helper method would be more appropriate. Try encapsulating the logic you need in both controllers in a separate method.