Generate Units::Defaults controller

bin/rails g controller Units/Defaults index

app/controllers/units/defaults_controller.rb

@@ -0,0 +1,8 @@
+class Units::DefaultsController < ApplicationController
+  before_action except: :index do
+    raise AccessForbidden unless current_user.at_least(:admin)
+  end
+
+  def index
+  end
+end

app/helpers/units/defaults_helper.rb

@@ -0,0 +1,2 @@
+module Units::DefaultsHelper
+end

app/views/units/defaults/index.html.erb

@@ -0,0 +1,2 @@
+<h1>Units::Defaults#index</h1>
+<p>Find me in app/views/units/defaults/index.html.erb</p>

config/routes.rb

@@ -8,6 +8,10 @@ Rails.application.routes.draw do
     end
   end
 
+  namespace :units do
+    get 'defaults/index'
+  end
+
   resources :users, only: [:index, :show, :update] do
     member do
       get :disguise

test/controllers/units/defaults_controller_test.rb

@@ -0,0 +1,8 @@
+require "test_helper"
+
+class Units::DefaultsControllerTest < ActionDispatch::IntegrationTest
+  test "should get index" do
+    get units_defaults_index_url
+    assert_response :success
+  end
+end