access variables from another controller

Question

I've just switched from PHP to rails and I'm trying to figure out how to get my menu_price controller to access a variable from my categories controller.

class CategoriesController < ApplicationController
  before_action :set_category, only: [:show, :edit, :update, :destroy]

  def index
     @categories = Category.all
  end

I thought of global variables but rad that this was not a safe approach. I also read that ruby does not support multiple inheritance which was going to be my second approach.

Here's my menu controller (I only added a portion of it because the rest of the code is not relevant.)

class MenuPricesController < ApplicationController
  before_action :set_menu_price, only: [:show, :edit, :update, :destroy]

  def index
    @menu_prices = MenuPrice.all
  end

I'm sure this is very simple but I've been looking for the past hour or so for an answer. I read about the concern folder but I'm not sure how to approach that, I haven't gotten that far in my book.

Answer 1

In your MenuPricesController you can create a new Category instance and use it like this :

class MenuPricesController < ApplicationController
  before_action :set_menu_price, only: [:show, :edit, :update, :destroy]


 def index
    @menu_prices = MenuPrice.all
    @categories = Category.all
    # do something
  end