The object of UserProifle cannot be saved for ShiroUser - grails

Question

I am working on a Grails app and I am trying to tie a ShiroUser with a UserProfile.
I have two models called ShiroUser and UserProfile. In my ShiroUser:
class ShiroUser {
... ...
static hasOne = [profile: UserProfile]
static constraints = {
email(nullable: false, blank: false, unique: true)
profile(nullable: false)
}
}
And in my UserProfile.groovy, I have:
class UserProfile {
... ...
static belongsTo = [shiroUser:ShiroUser]
}
However, in my ShiroUserController.groovy, when I try to create a new ShiroUser instance, this doesn't work so well. Here's my code:
def create() {
[shiroUserInstance: new ShiroUser(params), userProfileInstance: new UserProfile()]
}
def save() {
//todo add validation for email and password here.
def shiroUserInstance = new ShiroUser(params)
// Create a user profile
def userProfileInstance = new UserProfile()
shiroUserInstance.profile.email = params.email
shiroUserInstance.profile.firstName = params.firstName
shiroUserInstance.profile.lastName = params.lastName
if (!userProfileInstance.save(flush: true)){
render(view: "create", model: [userProfileInstance: userProfileInstance])
return
}
shiroUserInstance.profile = userProfileInstance
if (!shiroUserInstance.save(flush: true)) {
render(view: "create", model: [shiroUserInstance: shiroUserInstance])
return
}
flash.message = message(code: 'default.created.message', args: [message(code: 'shiroUser.label', default: 'ShiroUser'), shiroUserInstance.id])
redirect(action: "show", id: shiroUserInstance.id)
}
When I go to my application and try to create a new ShiroUser, the object cannot be saved. I updated the schema before I run the app so it should not be a migration issue. Any thoughts?

Answer 1

It looks like in this block of code you are assigning email, firstName and lastName to the wrong object:
// Create a user profile
def userProfileInstance = new UserProfile()
shiroUserInstance.profile.email = params.email
shiroUserInstance.profile.firstName = params.firstName
shiroUserInstance.profile.lastName = params.lastName
Try this instead:
// Create a user profile
def userProfileInstance = new UserProfile()
userProfileInstance.email = params.email
userProfileInstance.firstName = params.firstName
userProfileInstance.lastName = params.lastName
shiroUserInstance.profile = userProfileInstance
You should then be able to get away with just saving shiroUserInstance and it should automatically save userProfileInstance as well if you have your mapping set up correctly.