Visiting /districts/winchester/schools/winchester-high-school/dashboard displays an empty dashboard

app/controllers/dashboard_controller.rb

@@ -0,0 +1,13 @@
+class DashboardController < ApplicationController
+
+  def index
+    @school = School.find_by_slug school_slug
+  end
+
+  private
+
+  def school_slug
+    params[:school_id]
+  end
+
+end

app/views/dashboard/index.html.erb

@@ -0,0 +1 @@
+<h1><%= @school.name %></h1>

config/routes.rb

@@ -2,7 +2,11 @@ Rails.application.routes.draw do
   resources :question_lists
   resources :questions
   resources :categories
-  resources :districts
+  resources :districts do
+    resources :schools, only: [:index, :show] do
+      resources :dashboard, only: [:index]
+    end
+  end
   resources :experiments
 
   resources :schools do

spec/features/school_dashboard_feature_spec.rb

@@ -0,0 +1,14 @@
+require "rails_helper"
+
+RSpec.feature "School dashboard", type: feature do
+  let(:district) { District.create name: 'Winchester' }
+  let(:school) {
+    School.create name: 'Winchester High School', slug: 'winchester-high-school', district: district
+  }
+
+  scenario "User views a school dashboard" do
+    visit "/districts/winchester/schools/#{school.slug}/dashboard?year=2020-21"
+
+    expect(page).to have_text(school.name)
+  end
+end

spec/spec_helper.rb

@@ -1,3 +1,4 @@
+require 'capybara/rspec'
 # This file was generated by the `rails generate rspec:install` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
 # The generated `.rspec` file contains `--require spec_helper` which will cause
@@ -47,6 +48,8 @@ RSpec.configure do |config|
   # triggering implicit auto-inclusion in groups with matching metadata.
   config.shared_context_metadata_behavior = :apply_to_host_groups
 
+  config.include Capybara::DSL
+
 # The settings below are suggested to provide a good initial experience
 # with RSpec, but feel free to customize to your heart's content.
 =begin