Devise user sign up form with business model - ruby

Question

I'm trying to create a user sign up form with Devise that will also allow for the creation of a new business associated with that user.
I have a business model setup and can't seem to save the business information to the database. Below is my code, I'm fairly new to rails so I apologize if I'm asking a question with an obvious answer.
new.html.erb (user)
<div class="content">
<div class="row">
<div class="col-md-6 col-md-offset-3">
<h1>Sign Up</h1>
<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| %>
<%= devise_error_messages! %>
<div class="form-group">
<label>Name</label>
<%= f.text_field :username, :autofocus => true, :class => "form-control", :placeholder => "Full Name" %>
</div>
<div class="form-group">
<%= f.label :email %>
<%= f.text_field :email, :class => "form-control", :placeholder => "Email" %>
</div>
<div class="form-group">
<%= f.label :password %>
<%= f.password_field :password, :class => "form-control", :placeholder => "Password" %>
<p class="help-block">Passwords must be a minimum of 8 characters.</p>
</div>
<div class="form-group">
<%= f.label :password_confirmation %>
<%= f.password_field :password_confirmation, :class => "form-control", :placeholder => "Retype Password" %>
</div>
<!-- Business Infomation -->
<h2>Business Information</h2>
<%= f.fields_for :business do |b| %>
<div class="form-group">
<%= b.label :name %>
<%= b.text_field :name, :class => "form-control", :placeholder => "Business Name" %>
</div>
<div class="form-group">
<%= b.label :address %>
<%= b.text_field :address, :class => "form-control", :placeholder => "Address" %>
</div>
<div class="row">
<div class="col-sm-6">
<div class="form-group">
<%= b.label :city %>
<%= b.text_field :city, :class => "form-control", :placeholder => "City" %>
</div>
</div>
<div class="col-sm-2">
<div class="form-group">
<%= b.label :state %>
<%= b.text_field :state, :class => "form-control", :placeholder => "State" %>
</div>
</div>
<div class="col-sm-4">
<div class="form-group">
<%= b.label :zip %>
<%= b.text_field :zip, :class => "form-control", :placeholder => "ZIP" %>
</div>
</div>
</div>
<div class="form-group">
<%= b.label :country %>
<%= b.text_field :country, :class => "form-control", :placeholder => "Country" %>
</div>
<% end %>
<div class="well">
<%= f.submit "Sign Up", :class => "btn btn-primary" %>
</div>
<% end %>
</div>
</div>
user.rb
class User
include Mongoid::Document
include Mongoid::Paperclip
rolify
include Mongoid::Timestamps
#embeds_many :businesses, :class_name => "Business"
# Include default devise modules. Others available are:
# :token_authenticatable, :confirmable,
# :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
# Setup accessible (or protected) attributes for your model
attr_accessible :role_ids, :as => :admin
attr_accessible :username, :email, :password, :password_confirmation, :remember_me, :business_ids,
:reset_password_sent_at, :reset_password_within, :address, :city, :state, :zip, :country, :phone, :business_attributes
has_one :businesses
accepts_nested_attributes_for :businesses
validates_format_of :email, :with=>email_regexp, :allow_blank => true, :message=> "Justin"
#intercom
attr_accessor :company_name
attr_accessible :company_name
## Database authenticatable
field :email, :type => String, :default => ""
field :encrypted_password, :type => String, :default => ""
## Recoverable
field :reset_password_token, :type => String
#field :reset_password_sent_at, :type => Time
field :reset_password_sent_at, :type => Time
## Rememberable
field :remember_created_at, :type => Time
#field :remember_created_at, :type => String
## Trackable
field :username, :type => String
field :sign_in_count, :type => Integer, :default => 0
#field :current_sign_in_at, :type => Time
#field :last_sign_in_at, :type => Time
field :current_sign_in_at, :type => Time
field :last_sign_in_at, :type => Time
field :current_sign_in_ip, :type => String
field :last_sign_in_ip, :type => String
field :first_name, :type => String
field :last_name, :type => String
#field :business_ids, :type => Array
field :address, :type => String
field :city, :type => String
field :state, :type => String
field :zip, :type => String
field :country, :type => String
field :phone, :type => String
# User Avatar
attr_accessible :avatar
has_mongoid_attached_file :avatar,
:styles => { :full => ["512x512>", :jpg], :medium => ["256x256>", :jpg] },
:convert_options => {:medium => "-background black -gravity center -extent 256x256"},
:default_url => "/assets/avatar-blank.png"
validates_attachment_size :avatar, :less_than => 5.megabytes
validates_attachment_content_type :avatar, :content_type => ['image/jpeg', 'image/jpg', 'image/png', 'image/gif']
## Confirmable
# field :confirmation_token, :type => String
# field :confirmed_at, :type => Time
# field :confirmation_sent_at, :type => Time
# field :unconfirmed_email, :type => String # Only if using reconfirmable
## Lockable
# field :failed_attempts, :type => Integer, :default => 0 # Only if lock strategy is :failed_attempts
# field :unlock_token, :type => String # Only if unlock strategy is :email or :both
# field :locked_at, :type => Time
## Token authenticatable
# field :authentication_token, :type => String
after_create :create_business
def create_business
Business.create(business_id: self.id)
end
def assign_default_role(b)
# assign a default role if no role is assigned
# IF, invite token make user an editor for business
# ELSE, make the user owner of the business
self.add_role "owner", b
end
#Returns a businesses for a user. The return type is an array of Business models.
def businesses
Business.find(get_business_ids)
end
#returns the user business_ids (Array of Strings)
def get_business_ids
Business.find_roles(nil, self).map{|b| b.resource_id.to_s}.to_a
end
end

Answer 1

Try override Devise's registration controller:
# app/controllers/registrations_controller.rb
class RegistrationsController < Devise::RegistrationsController
def create
# save business here
end
end
And then tell devise to use customized controller:
# app/config/routes.rb
devise_for :users, :controllers => {:registrations => "registrations"}