Rails Controller behave weird with 'after_create' method. - 'undefined method `errors' for nil:NilClass'

Question

I am a newbie to rails. Please excuse this.

I am trying to implement 'after_create' into my controller, in order to make data into different table in DB.

after_create :create_order_confirm  

It will call this.

def create_order_confirm
    my_order_confirm = OrderConfirm.new(:order_id => @order.id.to_s)
    my_order_confirm.save
end

but, every time I try to render 'new', I got error following.

These are my full controller. (excluded not relevant part..)

class OrdersController < ApplicationController
  before_action :set_order, only: [:show, :edit, :update, :destroy]
  after_create :create_order_confirm

  # GET /orders
  # GET /orders.json
  def index
    @orders = Order.all
  end

  # GET /orders/1
  # GET /orders/1.json
  def show
    render "show"
  end

  # GET /orders/new
  def new # Error -> happen.
    @order = Order.new
  end

  ...
  ...



  private
    # Use callbacks to share common setup or constraints between actions.
    def set_order
      @order = Order.find(params[:id])
    end

    def create_order_confirm
        my_order_confirm = OrderConfirm.new(:order_id => @order.id.to_s)
        my_order_confirm.save
    end
end

It seems my new method wasn't called.

@order = Order.new

If I remove the 'after_create :create_order_confirm' this line. It's working fine. Would anyone explain this? and How can I use 'after_create'? I only want them to be called if the 'create' function has been called.

EDIT

changing order to @order didn't solve the problem.

Answer 1

after_action :create_order_confirm , only: [:create]

after_create is ActiveRecord callback. Not available in controller.

Answer 2

@order <> order. So, try:

<%= form_with(model: @order, local: true) do |form| %>
  <% if @order.errors.any? %>
    ...
  <% end %>
<% end %>