Problems with nested form Rails - ruby-on-rails-4

Question

I am trying to save in 2 tables in the same time, using nested form. I do not know why this is not happening. Rails error says "1 error prohibited this person from being saved:" Why the Legal Person is not getting the Person_id?
Models
class Person < ApplicationRecord
has_one :legal_person, dependent: :destroy
accepts_nested_attributes_for :legal_person
end
class LegalPerson < ApplicationRecord
belongs_to :person
end
Controller
class PeopleController < ApplicationController
before_action :set_person, only: [:show, :edit, :update, :destroy]
# GET /people
# GET /people.json
def index
#people = Person.all
end
# GET /people/1
# GET /people/1.json
def show
end
# GET /people/new
def new
#person = Person.new
#person.build_legal_person
end
# GET /people/1/edit
def edit
end
# POST /people
# POST /people.json
def create
#person = Person.new(person_params)
respond_to do |format|
if #person.save
format.html { redirect_to #person, notice: 'Person was successfully created.' }
format.json { render :show, status: :created, location: #person }
else
format.html { render :new }
format.json { render json: #person.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /people/1
# PATCH/PUT /people/1.json
def update
respond_to do |format|
if #person.update(person_params)
format.html { redirect_to #person, notice: 'Person was successfully updated.' }
format.json { render :show, status: :ok, location: #person }
else
format.html { render :edit }
format.json { render json: #person.errors, status: :unprocessable_entity }
end
end
end
# DELETE /people/1
# DELETE /people/1.json
def destroy
#person.destroy
respond_to do |format|
format.html { redirect_to people_url, notice: 'Person was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_person
#person = Person.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def person_params
#params.require(:person).permit(:nome, :tipopessoa, :telefonefixo, :telefonecelular)
params.require(:person).permit(:nome, :tipopessoa, :telefonefixo, :telefonecelular,
legal_person_attributes: LegalPerson.attribute_names.map(&:to_sym))
#legal_person_attributes: [:id, :cnpj, :nomefantasia, :person_id])
end
end
Error
Parameters: {"utf8"=>"✓", "authenticity_token"=>"pAAOYapSgnF8H6O2cJMpHSN6POBwAzycy00Tij5TKFDv+8d+EErtdQGKuRbay4IxKrUQjXVPq5MblVgjv5Fa5g==", "person"=>{"nome"=>"qweqw", "tipopessoa"=>"wqeqweq", "telefonefixo"=>"qweqe", "telefonecelular"=>"qweqw", "legal_person_attributes"=>{"cnpj"=>"qweqw", "nomefantasia"=>"wqewe"}}, "commit"=>"Criar Person"}
(0.1ms) BEGIN
(0.2ms) ROLLBACK

Answer 1

use attribute name [:cnpj, :nomefantasia] instead of
LegalPerson.attribute_names.map(&:to_sym)