undefined method `respond_to' for Api::V1::LocationsController:Class - ruby-on-rails

Question

I am new to rails and decided to make make an application that shows the weather. I followed this tutorial and GoRails Rails API video course. When I run server (path: http://127.0.0.1:3000/api/v1/locations), I see undefined method respond_to for Api::V1::LocationsController:Class error. The same is with http://127.0.0.1:3000/api/v1/locations/1. I googled a lot, but didn't see an appropriate answer. I am leaving code here. Locations is for the city and Recordings is for temperature. I am also leaving schema here if this is the case. A screen of directories tree is attached.
I'VE NEVER BEEN SO STUCK
routes.rb
Rails.application.routes.draw do
# Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
# Defines the root path route ("/")
namespace :api, defaults: { format: :json } do
namespace :v1 do
resources :locations
end
end
resources :locations
root "locations#index"
end
locations_controller:
module Api
module V1
class LocationsController < ApplicationController
respond_to :json
def index
respond_with LocationsController.all
end
def show
respond_with find_location
end
private
def find_location
#location = LocationsController.find(params[:id])
end
end
end
end
recordings_controller
class RecordingsController < ApplicationController
end
application_controller
class ApplicationController < ActionController::Base
end
Models:
location.rb
It is also not able to find these fields in db for some reason...
class Location < ApplicationRecord
belongs_to :recording
validates_uniqueness_of :name
end
recording.rb
class Recording < ApplicationRecord
has_many :locations
end
schema:
ActiveRecord::Schema[7.0].define(version: 2022_10_20_135036) do
create_table "locations", force: :cascade do |t|
t.integer "recording_id", null: false
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["recording_id"], name: "index_locations_on_recording_id"
end
create_table "recordings", force: :cascade do |t|
t.integer "temp"
t.string "status"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_foreign_key "locations", "recordings"
end
I thought to use here one-to-many association. As I thought, one city has one temperature and one temperature has loads of cities.

Answer 1

The tutorial you are following is quite old and partly outdated. The respond_to method which is in the first line of the Api::V1:: LocationsController was removed in Ruby on Rails 5.0 about six years ago.
But the good news it that its functionality has been extracted to the responders gem. That means when you add that gem to your application's Gemfile then it might work after running bundle install and restarting the server.
Note. I wrote it might work because it is possible that there are other incompatibilities between the tutorial and your current, up-to-date Ruby on Rails version 7.0.