how to pass params using action button in grails

Question

been having toruble with the button that has action. I have several btns which I want to know its paramaeter. In grails tutorial it says it should be like this:

 <g:actionSubmit    action="action" value="${message(code: 'default.button.edit.label', default: 'Edit')}" params="['actionTaken':editPhone]"/>

I tried using remotelink, submitButton, submitToRemote tags but none works. I always get null when I try parsing it in my controller:

def action=
    {
        def actionTaken = params.actionTaken
        def employeeId= params.employeeId

        MySession session = MySession.getMySession(request, params.employeeId)
        profileInstance = session.profileInstance

        switch(actionTaken)
        {
            case "editPhone" :
                isEditPhone=true
                break

            case "editEmail" :
                isEditEmail=true
                break
        }
        render(view:"profile", model:[profileInstance:session.profileInstance, isEditPhone:isEditPhone, isEditEmail:isEditEmail])
    }

What am I missing? is my params code wrong? Is my code in parsing params wrong? this just gets me in circles with no progress. help. thanks.

Solution 1

The Grails documentation doesn't list params as one of the attributes accepted by actionSubmit.

It is possible to inject the value you want in your params list in the controller by exploiting what that tag actually does:

def editPhone = { forward(action:'action', params:[actionTaken: 'editPhone'])}
def editEmail = { forward(action:'action', params:[actionTaken: 'editEmail'])}

You may also just want to just code completely separate logic into the editPhone and editEmail actions if that makes your code cleaner.

Updated View Code:

<g:actionSubmit action="editPhone" value="${message(code: 'default.button.edit.label', default: 'Edit')}" />

Solution 2

The params attribute is parsed as a map, where the keys are treated a strings but the values are treated as expressions. Therefore

params="['actionTaken':editPhone]"

is trying to define the key named actionTaken to have the value from the variable named editPhone in the GSP model. Since there is no such variable you're getting null. So the fix is to move the quotes:

params="[actionTaken:'editPhone']"

which will set the value to the string "editPhone".

Solution 3

You could also pass the parameter inside the POST-data using

<input type="hidden" name="actionTaken" value="editPhone" />

inside the form. Then it is also accessible through the params variable. It works for me.