Ruby on Rails assign company_id and job_id in models - ruby-on-rails

Question

Have three models: Company, Job and JobApplications. When submitting the job form, the company_id and job_id are showing up as nil in the rails console. What's the best way to assign both company_id and job_id values for each job created by a company?
I've added the company_id and job_id to the companies and jobs tables. Within the create method of my jobs model, I've assigned #company_id to the job params and company_id and job_id are still showing as nil after creating a job.
Controller Actions
class CompaniesController < ApplicationController
def new
#company = current_user.build_company
end
def create
#job = Job.new
#company = Company.new(company_params)
end
private
def set_company
#company = Company.find(params[:id])
end
def company_params
params.require(:company).permit(:avatar, :name, :website, :about)
end
class JobsController < ApplicationController
def new
#job = Job.new(:company_id => params[:id])
#company_id = params[:job][:company_id]
end
def create
# #job = current_user.jobs.build(job_params)
#job = Job.find(params[:job_id])
# #company = #job.company
#job = Job.create(job_params.merge(user: current_user, company_id: current_user, job_id: #job))
#company_id = params[:job][:company_id]
end
private
def set_job
#job = Job.find_by(id: params[:id])
if #job.nil?
redirect_to jobs_path
end
end
def job_params
params.require(:job).permit(:company_name, :company_website, :company_description, :company_avatar, :title, :location, :salary, :job_author, :remote_role, :job_type, :rounds_of_interviews, :start_date, :qualifications, :description, :benefits, :job_id)
end
class JobApplicationsController < ApplicationController
def create
#job_application = JobApplication.new(job_application_params)
#job_application.user_id = current_user.id
end
private
def set_job
#job = Job.find(params[:job_id])
# self.job_id
end
def job_application_params
params.permit(:first_name, :last_name, :email, :phone, :attachment, :work_for_any_employer, :require_visa_sponsorship)
end
Models
class Company < ApplicationRecord
has_many :conversations
has_many :jobs
has_many :job_applications, through: :jobs
end
class Job < ApplicationRecord
belongs_to :user
belongs_to :company, optional: true
has_many :job_applications, dependent: :destroy
end
class JobApplication < ApplicationRecord
belongs_to :user
belongs_to :job
validates_uniqueness_of :user_id, scope: :job_id
end