subcategories and categories rails friendly_id - ruby-on-rails

Question

Cant seem to get friendly_id to work with with my categories and subcategories. I am using the friendly_id gem as well.
Here is my categories controller
class CategoriesController < ApplicationController
def index
#categories = Category.all
#oval = #categories[0]
#atv = #categories[1]
#boat = #categories[2]
#fab = #categories[3]
#chassis = #categories[4]
#classic = #categories[5]
#dirt = #categories[6]
#dragracing = #categories[7]
#audio = #categories[8]
#engine = #categories[9]
#tune = #categories[10]
#enginecom = #categories[11]
#exhaust = #categories[12]
#golfcart = #categories[13]
#hotrod = #categories[14]
#karts = #categories[15]
#modern = #categories[16]
#motorcycle = #categories[17]
#muscle = #categories[18]
#offroad = #categories[19]
#racingitem = #categories[20]
#accessories = #categories[21]
#position = #categories[22]
#racingeq = #categories[23]
#roadracing = #categories[24]
#safety = #categories[25]
#snowmobile = #categories[26]
#tw = #categories[27]
#tools = #categories[28]
#rvs = #categories[29]
#tractor = #categories[30]
#trailer = #categories[31]
#transmission = #categories[32]
#truckpart = #categories[33]
#drift = #categories[34]
#import = #categories[35]
end
For example my url right now is
localhost:3000/categories/4/subcategories/27
I want it to be
localhost:3000/categories/dragracing/subcategories/pro-mod
Here is my routes
Rails.application.routes.draw do
resources :channels
resources :discussions do
resources :replies
end
resources :comments
resources :blogs
mount RailsAdmin::Engine => '/admin', as: 'rails_admin'
mount ActionCable.server => '/cable'
get 'users/show'
get 'about', to: 'pages#about'
get 'directory', to: 'pages#directory'
get 'contact', to: 'pages#contact'
get 'privacy', to: 'pages#privacy'
get 'faq', to: 'pages#faq'
get '/myads', to: 'posts#myads'
get 'partner', to: 'pages#partner'
get '/sitemap' => 'sitemap#index', defaults: {format: "xml"}
root 'categories#index'
devise_for :users, path: '', path_names: { sign_in: 'login', sign_out: 'logout', sign_up: 'register' }, controllers: { registrations: "registrations"}
resources :users
resources :mes
resources :pricing, only:[:index]
resources :posts
resource :subscription
resources :categories do
resources :subcategories
end
end

Answer 1

The descripition of the route you are trying to use is:
# /categories/:category_id/subcategories/:id
This means that whatever you send instead of :category_id will be available in your controller as params[:category_id], the same for :id => params[:id].
So, if you send /categories/dragracing/subcategories/pro-mod, your parameters will be:
{ 'category_id' => 'dragracing', 'id' => 'pro-mod' }
As your code currently stands, this endpoint will be routed to subcategories#show.
# category_subcategory GET /categories/:category_id/subcategories/:id(.:format) subcategories#show
So you need a controller for that. You don't need to send ids or numbers whatsoever in the URL, you just need to handle them correctly:
class SubcategoriesController < ApplicationController
def show
#category = Category.friendly.find params[:category_id] # dragracing
#subcategory = Subcategory.friendly.find params[:id] # pro-mod
end
end