Error in the creation of new post in rails

I am creating an application in rails in which a freelance has a has_one association with a service. the app is running well until you have to create a new service as a freelancer. when I create a new post I get the error.

I did a test leaving the freelancer association with has_many and it works perfect leaving current_freelancer.services.build. but with has_one I get the error mentioned above.

  

NoMethodError in ServicesController # new undefined method 'services'   for # Did you mean? service service =

the controller for the services is as follows.

class ServicesController < ApplicationController
  before_action :set_service, only: [:show, :edit, :update, :destroy]

  def index
    @services = Service.all
  end

  def show
  end

  def new
    @service = current_freelance.services.build
  end

  def edit
  end

  def create
    @service = current_freelance.services.build(service_params)

    respond_to do |format|
      if @service.save
        format.html { redirect_to @service, notice: 'Service was successfully created.' }
        format.json { render :show, status: :created, location: @service }
      else
        format.html { render :new }
        format.json { render json: @service.errors, status: :unprocessable_entity }
      end
    end
  end
end