fix linter

app/controllers/courses_controller.rb

@@ -1,5 +1,5 @@
 class CoursesController < ApplicationController
-  before_action :set_course, only: %i[ show update destroy ]
+  before_action :set_course, only: %i[show update destroy]
 
   # GET /courses
   def index
@@ -39,13 +39,14 @@ def destroy
   end
 
   private
-    # Use callbacks to share common setup or constraints between actions.
-    def set_course
-      @course = Course.find(params[:id])
-    end
 
-    # Only allow a list of trusted parameters through.
-    def course_params
-      params.require(:course).permit(:name, :description, :image, :fee, :startDate)
-    end
+  # Use callbacks to share common setup or constraints between actions.
+  def set_course
+    @course = Course.find(params[:id])
+  end
+
+  # Only allow a list of trusted parameters through.
+  def course_params
+    params.require(:course).permit(:name, :description, :image, :fee, :startDate)
+  end
 end

app/controllers/reservations_controller.rb

@@ -1,5 +1,5 @@
 class ReservationsController < ApplicationController
-  before_action :set_reservation, only: %i[ show update destroy ]
+  before_action :set_reservation, only: %i[show update destroy]
 
   # GET /reservations
   def index
@@ -39,13 +39,14 @@ def destroy
   end
 
   private
-    # Use callbacks to share common setup or constraints between actions.
-    def set_reservation
-      @reservation = Reservation.find(params[:id])
-    end
 
-    # Only allow a list of trusted parameters through.
-    def reservation_params
-      params.require(:reservation).permit(:user_id, :course_id, :city, :date)
-    end
+  # Use callbacks to share common setup or constraints between actions.
+  def set_reservation
+    @reservation = Reservation.find(params[:id])
+  end
+
+  # Only allow a list of trusted parameters through.
+  def reservation_params
+    params.require(:reservation).permit(:user_id, :course_id, :city, :date)
+  end
 end

app/controllers/users_controller.rb

@@ -1,5 +1,5 @@
 class UsersController < ApplicationController
-  before_action :set_user, only: %i[ show update destroy ]
+  before_action :set_user, only: %i[show update destroy]
 
   # GET /users
   def index
@@ -39,13 +39,14 @@ def destroy
   end
 
   private
-    # Use callbacks to share common setup or constraints between actions.
-    def set_user
-      @user = User.find(params[:id])
-    end
 
-    # Only allow a list of trusted parameters through.
-    def user_params
-      params.require(:user).permit(:name)
-    end
+  # Use callbacks to share common setup or constraints between actions.
+  def set_user
+    @user = User.find(params[:id])
+  end
+
+  # Only allow a list of trusted parameters through.
+  def user_params
+    params.require(:user).permit(:name)
+  end
 end

app/models/course.rb

@@ -1,4 +1,4 @@
 class Course < ApplicationRecord
-    has_many :reservations
-    has_many :users, through: :reservations
+  has_many :reservations
+  has_many :users, through: :reservations
 end

app/models/user.rb

@@ -1,4 +1,4 @@
 class User < ApplicationRecord
-    has_many :reservations
-    has_many :courses, through: :reservations
+  has_many :reservations
+  has_many :courses, through: :reservations
 end

test/controllers/courses_controller_test.rb

@@ -1,35 +1,37 @@
-require "test_helper"
+require 'test_helper'
 
 class CoursesControllerTest < ActionDispatch::IntegrationTest
   setup do
     @course = courses(:one)
   end
 
-  test "should get index" do
+  test 'should get index' do
     get courses_url, as: :json
     assert_response :success
   end
 
-  test "should create course" do
-    assert_difference("Course.count") do
-      post courses_url, params: { course: { description: @course.description, fee: @course.fee, image: @course.image, name: @course.name, startDate: @course.startDate } }, as: :json
+  test 'should create course' do
+    assert_difference('Course.count') do
+      post courses_url,
+           params: { course: { description: @course.description, fee: @course.fee, image: @course.image, name: @course.name, startDate: @course.startDate } }, as: :json
     end
 
     assert_response :created
   end
 
-  test "should show course" do
+  test 'should show course' do
     get course_url(@course), as: :json
     assert_response :success
   end
 
-  test "should update course" do
-    patch course_url(@course), params: { course: { description: @course.description, fee: @course.fee, image: @course.image, name: @course.name, startDate: @course.startDate } }, as: :json
+  test 'should update course' do
+    patch course_url(@course),
+          params: { course: { description: @course.description, fee: @course.fee, image: @course.image, name: @course.name, startDate: @course.startDate } }, as: :json
     assert_response :success
   end
 
-  test "should destroy course" do
-    assert_difference("Course.count", -1) do
+  test 'should destroy course' do
+    assert_difference('Course.count', -1) do
       delete course_url(@course), as: :json
     end
 

test/controllers/reservations_controller_test.rb

@@ -1,35 +1,37 @@
-require "test_helper"
+require 'test_helper'
 
 class ReservationsControllerTest < ActionDispatch::IntegrationTest
   setup do
     @reservation = reservations(:one)
   end
 
-  test "should get index" do
+  test 'should get index' do
     get reservations_url, as: :json
     assert_response :success
   end
 
-  test "should create reservation" do
-    assert_difference("Reservation.count") do
-      post reservations_url, params: { reservation: { city: @reservation.city, course_id: @reservation.course_id, date: @reservation.date, user_id: @reservation.user_id } }, as: :json
+  test 'should create reservation' do
+    assert_difference('Reservation.count') do
+      post reservations_url,
+           params: { reservation: { city: @reservation.city, course_id: @reservation.course_id, date: @reservation.date, user_id: @reservation.user_id } }, as: :json
     end
 
     assert_response :created
   end
 
-  test "should show reservation" do
+  test 'should show reservation' do
     get reservation_url(@reservation), as: :json
     assert_response :success
   end
 
-  test "should update reservation" do
-    patch reservation_url(@reservation), params: { reservation: { city: @reservation.city, course_id: @reservation.course_id, date: @reservation.date, user_id: @reservation.user_id } }, as: :json
+  test 'should update reservation' do
+    patch reservation_url(@reservation),
+          params: { reservation: { city: @reservation.city, course_id: @reservation.course_id, date: @reservation.date, user_id: @reservation.user_id } }, as: :json
     assert_response :success
   end
 
-  test "should destroy reservation" do
-    assert_difference("Reservation.count", -1) do
+  test 'should destroy reservation' do
+    assert_difference('Reservation.count', -1) do
       delete reservation_url(@reservation), as: :json
     end
 

test/controllers/users_controller_test.rb

@@ -1,35 +1,35 @@
-require "test_helper"
+require 'test_helper'
 
 class UsersControllerTest < ActionDispatch::IntegrationTest
   setup do
     @user = users(:one)
   end
 
-  test "should get index" do
+  test 'should get index' do
     get users_url, as: :json
     assert_response :success
   end
 
-  test "should create user" do
-    assert_difference("User.count") do
+  test 'should create user' do
+    assert_difference('User.count') do
       post users_url, params: { user: { name: @user.name } }, as: :json
     end
 
     assert_response :created
   end
 
-  test "should show user" do
+  test 'should show user' do
     get user_url(@user), as: :json
     assert_response :success
   end
 
-  test "should update user" do
+  test 'should update user' do
     patch user_url(@user), params: { user: { name: @user.name } }, as: :json
     assert_response :success
   end
 
-  test "should destroy user" do
-    assert_difference("User.count", -1) do
+  test 'should destroy user' do
+    assert_difference('User.count', -1) do
       delete user_url(@user), as: :json
     end
 

test/models/course_test.rb

@@ -1,4 +1,4 @@
-require "test_helper"
+require 'test_helper'
 
 class CourseTest < ActiveSupport::TestCase
   # test "the truth" do

test/models/reservation_test.rb

@@ -1,4 +1,4 @@
-require "test_helper"
+require 'test_helper'
 
 class ReservationTest < ActiveSupport::TestCase
   # test "the truth" do

test/models/user_test.rb

@@ -1,4 +1,4 @@
-require "test_helper"
+require 'test_helper'
 
 class UserTest < ActiveSupport::TestCase
   # test "the truth" do