Devise: Add User Details in different table - ruby-on-rails

Question

I have two models User and Person
I want to stick with the default table for the user offered by Devise to include only email and password and add User details in Person
Here is my models
class Person < ApplicationRecord
belongs_to :user
end
User Model
class User < ApplicationRecord
...
has_one :person
...
end
I also override RegistrationController.rb to look like this
class RegistrationsController < Devise::RegistrationsController
def sign_up_params
params.require(:user).permit(:first_name, :email, :password, :password_confirmation)
end
end
and here is the view
<h2>Sign up</h2>
<%= simple_form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %>
<%= f.error_notification %>
<%= f.fields_for :person do |p| %>
<%= p.text_field :first_name %>
<%= p.text_field :last_name %>
<% end %>
<div class="form-inputs">
<%= f.input :email, required: true, autofocus: true %>
<%= f.input :password, required: true, hint: ("#{#minimum_password_length} characters minimum" if #minimum_password_length) %>
<%= f.input :password_confirmation, required: true %>
</div>
<div class="form-actions">
<%= f.button :submit, "Sign up" %>
</div>
<% end %>
<%= render "devise/shared/links" %>
With the code it didn't work, and it didn't update the people column while registration
How Can I get devise to add details in two models using the only one form offered by devise ?
To add email and password in Users Table
and other details e.g. first_name in People Table

Answer 1

Nested-Models setup for simple_form
Add accepts_nested_attributes_for to User model
class User < ActiveRecord::Base
has_one :person
accepts_nested_attributes_for :person
end
Update permit params in controller:
class RegistrationsController < Devise::RegistrationsController
def sign_up_params
params.require(:user).permit(:email, :password, :password_confirmation,
person_attributes: [:first_name, :last_name])
end
end
Change f.fields_for :person to f.simple_fields_for :person in view.
Check https://github.com/plataformatec/simple_form/wiki/Nested-Models

Answer 2

You need to set strong params inside your controller private method as per below:
def sign_up_params
params.require(:user).permit(:first_name, :email, :password, :password_confirmation, person_attributes: [:person_model_attributes])
end
Inside your User model add below line:
accepts_nested_attributes_for :person