parameters will not pass in the child class

when i'm try to create a job, it will show company must exit, c_name and company_id will not pass in the views/jobs/_form
class CreateJobs < ActiveRecord::Migration[5.1] def change create_table :jobs do |t| t.string :title t.text :description t.string :c_name t.integer :user_id t.integer :company_id t.timestamps end end end

    class CreateCompanies < ActiveRecord::Migration[5.1]
      def change
        create_table :companies do |t|
          t.string :c_name
          t.text :c_description
          t.integer:user_id
          t.timestamps
        end
      end
    end

    # Models
    class User < ApplicationRecord
      # Include default devise modules. Others available are:
      # :confirmable, :lockable, :timeoutable and :omniauthable
      devise :database_authenticatable, :registerable,
             :recoverable, :rememberable, :trackable, :validatable

      has_many :companies
      has_many :jobs
    end

    class Job < ApplicationRecord
        belongs_to :user
        belongs_to :category
        belongs_to :company
    end

    class Company < ApplicationRecord
        belongs_to:user
        has_many:jobs

    end

    # Jobs controller
    def show
            end

            def new

                   @job = current_user.jobs.build       
            end

    def create
            job_attrs = jobs_params.except(:c_name)
            job_attrs[:c_name] = Company.find_by(id: jobs_params[:c_name])
            @job = current_user.jobs.build(job_attrs)

          if @job.save
            flash[:success]= "success"
            redirect_to @job

            else

            flash[:error]=@job.errors.full_messages
            render "new"
            end
        end

    def jobs_params
                params.require(:job).permit(:title, :description, :c_name, :category_id, :image,:jobclosedate,:company_id)
    end
in the jobs/_form
  <%= simple_form_for(@job,validation:true ,html: { mutlipart: true, class: 'form-horizontal'}) do |f| %>
<%= f.input :title, label: "Job Title", input_html: { class: "form-control"}%>
<%= f.input :description, label: "Job Description", input_html: { class: "form-control" }%>
<%= f.input :c_name, label: "Your Company", input_html: { class: "form-control" }%>
<%= f.collection_select :category_id,Category.all, :id, :name, {promt: "Choose a category" }%>

when i'm try to create a job, it will show company must exit, c_name and company_id will not pass in the views/jobs/_form . could you please help me to sort it out.it's seems create def has issue. i'm new to ruby please explain me to sort this out.