Rails: How to create a user that has a `belongs_to` association - ruby-on-rails

Question

I am brand new to the world of rails so please forgive my ignorance with this question :)
I am currently setting up a new app that has two models:
Account
User
My seed file looks like this:
account = Account.create!(name: 'Account Name')
account.users.create!(
first_name: 'Test',
last_name: 'Test',
email: 'test#test.com,
password: 'test',
owner: true
)
And the users model is:
class User < ApplicationRecord
belongs_to :account
...
end
I have created a custom Devise registrations controller to let new users sign up:
class Users::RegistrationsController < Devise::RegistrationsController
# GET /sign_up
def new
render inertia: 'Auth/Register', props: {}
end
# POST
def create # rubocop:disable Lint/UselessMethodDefinition
super
end
def sign_up_params
params.require(:user).permit( :email, :password, :first_name, :last_name)
end
end
BUT! I need to pre-create an account for a user before I actually create the user here and this is something I have been stuck on for a few days with no luck (to the point I've considered changing the association's).
The error is:
Account must exist
Which makes sense because we don't have an account when we create a new user which is what i need to do before the user is registered.
My best guess was I needed to do something like:
# POST
def create
account = Account.create!(name: 'Test')
account.users.create!(sign_up_params)
end
to mimic the logic of the seeds file but this seems distinctly wrong to me and doesn't work.
So my question is, is it possible and how can I pre-create an Account model for a user and then associate it to the user in the registrations create method before the user is persisted to the database?
In my final production code, the goal would be to create an Account type that will be created and associated with a user on registration but for now just getting a very basic MVC up and running is the goal :)
Thank you so much in advance for any help!

Answer 1

First off, I think the account is supposed to belong to the user, not the opposite.
The user model User.rb should look like this:
has_one :account
And the account model Account.rb should look like this:
belongs_to :user
And to create an account once the user is created, you can simply add this line to your user model:
after_create :create_account
and the account will be created automatically.

Answer 2

What about using?
user = User.new(sign_up_params)
user.build_account(name: 'Test')
user.save!

Answer 3

The problem is the line belongs_to :account in User model.
I would suggest you break your User model in two models
User
UserDetails
You can then add belongs_to :account in UserDetails model.
This will help in independent creation of users, will not be affected by account.
Something like below.
class User < ApplicationRecord
has_one :user_detail
...
end
class UserDetails < ApplicationRecord
belongs_to :user
belongs_to :account
...
end
class Account < ApplicationRecord
has_many :user_details
...
end