Noob: Weird Association Question

Ok, so I’ve been trying to make this thing work for a couple of days now without luck. I am just tarting to think that what I want to do is not possible. The associations that I am trying to describe are:


has_many :groups

has_many :users

belongs_to :admin, :class_name => “User”

belongs_to :default_group, :class_name => “Group”

validates_presence_of :company_name, :max_users, :email

after_create :create_default_admin_and_group


belongs_to :account

belongs_to :role

has_and_belongs_to_many :groups

validates_presence_of :first_name

before_create :account_max_users?

before_validation :generate_node_token, :if => “node_token.blank?”

before_validation :ensure_authentication_token, :if => “authentication_token.blank?”

before_destroy :is_group_admin?

before_destroy :is_account_admin?


has_many :users

validates_presence_of :name

validates_uniqueness_of :name


belongs_to :admin, :class_name => “User”

belongs_to :account

has_and_belongs_to_many :users

validates_presence_of :name

validates_uniqueness_of :name, :scope => :account_id

The most complicated association is the one between Account and Users, and Account and Groups. The thing is that an Account has many users and groups (each of them has account_id attribute), but at the same time, and account belongs to an User (which is the admin of the account) and belongs to a Group (which is the default group of the account).

Right now, what I’m trying to do is to create an Account, so that will call the create_default_admin_and_group method which is basically something like this:

def create_default_admin_and_group

role = Role.find_or_create_by_name(“Admin”)

admin = self.create_admin(:ebmail => email,

:first_name => company_name,

:password => generate_random_password,

:role => role)

self.build_default_group(:name => company_name,

:admin => admin)


It should create an “Admin” role if it doesn’t exist yet and then create the admin (User class) of the account. Before creating the admin the account_max_users method is executed in order to know if we can add more users to the account. The problem comes here:

def account_max_users?



This method should call the max_users? method from the Account model which is something like:

def max_users?

self.users.count == self.max_users


where max_users is an attribute of an account, but for some weird reason self.account is nil in the account_max_users? method. It looks like the following code:

admin = self.create_admin(:email => email,

:first_name => company_name,

:password => generate_random_password,

:role => role)

doesn’t seem to set role_id and account_id correctly. I’ve checked that printing out the object just before “!self.account.max_users?” is executed and this is the result:

#User:0x00000103ce97e0 {

:id => nil,

:email => “”,

:encrypted_password => “$2a$10$KjaFu/fTqajr/f650oJ/q…essukILBNVkOKZKr6fFt23JqV6lrT6”,

:password_salt => “$2a$10$KjaFu/fTqajr/f650oJ/q.”,

:reset_password_token => nil,

:remember_token => nil,

:remember_created_at => nil,

:sign_in_count => 0,

:current_sign_in_at => nil,

:last_sign_in_at => nil,

:current_sign_in_ip => nil,

:last_sign_in_ip => nil,

:authentication_token => “XYxHY0eC8GHJg-pbp3CB”,

:created_at => nil,

:updated_at => nil,

:node_token => “dd4f30ae8641d441bd666f03b4a653d6”,

:first_name => “Company-1”,

:last_name => nil,

:account_id => nil,

:role_id => nil


Is there any reason why this is happening? Are those associations correct? Am I doing something wrong?

Thanks in advance.

I’m using Rails 3.0.5 and Ruby 1.9.2-head. If you need any other information just tell me.