Grails one to many relationship Error - grails

Question

I have a User domain Class as follows:
package xyz
class User {
String login
String password
String firstName
String lastName
String address
String email
static hasMany = [
websites: AddWebsite
]
static constraints = {
login blank:false, size:5..15,matches:/[\S]+/, unique:true
password blank:false, size:5..15,matches:/[\S]+/
firstName blank:false
lastName blank:false
email email: true
}
}
and another AddWebsite domain class as follows:
package xyz
import xyz.User;
class AddWebsite {
String website
User user
static belongsTo = [user: User]
static constraints = { website url:true }
}
I am working with MongoDB at the backend. I need that every user who logs in can add websites but a user can't add same websites multiple times but same website can be added by different users. Whenever I try to add a website, it shows me "user cannot be null error".
My controller class for AddWebsite is as follows:
package xyz
class AddWebsiteController {
def index() {
}
def addWebsites() {
if(request.method == 'POST') {
def u = new AddWebsite()
u.properties[
'website'
] = params
if(u.website =="" ) {
u.errors.rejectValue("website", "addwebsite.website.empty")
return [addWebsite:u]
}
else if(u.save()) {
render view:'addWebsites', model:[message: "Successfully saved: \""+u.website+"\" Add more websites..."]
//redirect(controller: "AddWebsite", action: "websiteAdded")
}
else {
return [addWebsite:u]
}
}
}
def websiteAdded() {
}
def failed(){
}
}
Also, I am not sure how to test whether this one to many association. Please help.

Answer 1

Figured it out. I made this change in the controller so that the user won't be null anymore:
def addWebsites() {
if(request.method == 'POST') {
def w = new AddWebsite()
w.properties[
'website'
] = params
w.user = session["user"] //modified
if(w.website =="" ) {
w.errors.rejectValue("website", "addwebsite.website.empty")
return [addWebsite:w]
}
else if(w.save()) {
render view:'addWebsites', model:[message: "Successfully saved: \""+w.website+"\" Add more websites..."]
}
else {
return [addWebsite:w]
}
}
}