working on categories for schools

app/controllers/categories_controller.rb

@@ -1,4 +1,5 @@
 class CategoriesController < ApplicationController
+  before_action :set_school, only: [:show]
   before_action :set_category, only: [:show, :edit, :update, :destroy]
 
   # GET /categories
@@ -62,7 +63,12 @@ class CategoriesController < ApplicationController
   end
 
   private
-    # Use callbacks to share common setup or constraints between actions.
+    def set_school
+      redirect_to root_path and return false unless params.include?(:school_id)
+      @school = School.find(params[:school_id])
+      redirect_to root_path and return false if @school.nil?
+    end
+
     def set_category
       @category = Category.find(params[:id])
     end

config/routes.rb

@@ -13,6 +13,7 @@ Rails.application.routes.draw do
       end
     end
     resources :schedules
+    resources :categories, only: [:show]
   end
 
   # resources :attempts, only: [:get, :update]

spec/controllers/categories_controller_spec.rb

@@ -45,10 +45,18 @@ RSpec.describe CategoriesController, type: :controller do
   end
 
   describe "GET #show" do
-    it "assigns the requested category as @category" do
+    it "assigns the requested school and category as @school and @category" do
+      school = School.create! name: 'School'
       category = Category.create! valid_attributes
-      get :show, params: {id: category.to_param}, session: valid_session
+      get :show, params: {school_id: school.id, id: category.to_param}, session: valid_session
       expect(assigns(:category)).to eq(category)
+      expect(assigns(:school)).to eq(school)
+    end
+
+    it "redirects to root_path if school is not provided" do
+      category = Category.create! valid_attributes
+      get :show, params: {id: category.to_param}, session: valid_session
+      expect(response).to redirect_to(root_path)
     end
   end