letter_opener tab displaying nothing - ruby-on-rails

Question

I am new to rails and I have an application that is supposed to send a confirmation email after creating a booking however, when I go to the /letter_opener tab after creating a booking nothing shows up
application_mailer.rb
class ApplicationMailer < ActionMailer::Base
default from: "support#flightbooker.com"
layout "mailer"
end
passenger_mailer.rb
class PassengerMailer < ApplicationMailer
def booking_confirmation
#passenger = params[:passenger]
#booking = params[:booking]
#flight = params[:flight]
mail(to: #passenger.email, subject: "Confirmation Email")
end
end
bookings_controller.rb
class BookingsController < ApplicationController
include BookingsHelper
def new
#booking = Booking.new
#selected_flight = Flight.find(params[:flight])
#passengers_count = params[:passengers].to_i
#passengers_count.times{#booking.passengers.build}
end
def create
#booking = Booking.new(booking_params)
if #booking.save
#booking.passengers.each do |pax|
PassengerMailer.with(passenger: pax).booking_confirmation.deliver_now
end
flash[:success] = 'Booking saved!'
redirect_to booking_path(#booking)
else
flash[:alert] = "An error has occured!"
render "new"
end
end
def show
#booking = Booking.find(params[:id])
end
end
Gemfile
source "https://rubygems.org"
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby "3.1.2"
# Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
gem "rails", "~> 7.0.4"
# The original asset pipeline for Rails [https://github.com/rails/sprockets-rails]
gem "sprockets-rails"
# Use sqlite3 as the database for Active Record
gem "sqlite3", "~> 1.4"
# Use the Puma web server [https://github.com/puma/puma]
gem "puma", "~> 5.0"
# Use JavaScript with ESM import maps [https://github.com/rails/importmap-rails]
gem "importmap-rails"
# Hotwire's SPA-like page accelerator [https://turbo.hotwired.dev]
gem "turbo-rails"
# Hotwire's modest JavaScript framework [https://stimulus.hotwired.dev]
gem "stimulus-rails"
# Build JSON APIs with ease [https://github.com/rails/jbuilder]
gem "jbuilder"
# Use Redis adapter to run Action Cable in production
# gem "redis", "~> 4.0"
# Use Kredis to get higher-level data types in Redis
[https://github.com/rails/kredis]
# gem "kredis"
# Use Active Model has_secure_password
[https://guides.rubyonrails.org/active_model_basics.html#securepassword]
# gem "bcrypt", "~> 3.1.7"
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ]
# Reduces boot times through caching; required in config/boot.rb
gem "bootsnap", require: false
# Use Sass to process CSS
# gem "sassc-rails"
# Use Active Storage variants
[https://guides.rubyonrails.org/active_storage_overview.html#transforming-images]
# gem "image_processing", "~> 1.2"
group :development, :test do
See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-
the-debug-gem
gem "debug", platforms: %i[ mri mingw x64_mingw ]
end
group :development do
# Use console on exceptions pages [https://github.com/rails/web-console]
gem "web-console"
# Add speed badges [https://github.com/MiniProfiler/rack-mini-profiler]
# gem "rack-mini-profiler"
# Speed up commands on slow machines / big apps [https://github.com/rails/spring]
# gem "spring"
gem 'letter_opener_web'
end
group :test do
# Use system testing [https://guides.rubyonrails.org/testing.html#system-testing]
gem "capybara"
gem "selenium-webdriver"
gem "webdrivers"
end
development.rb
require "active_support/core_ext/integer/time"
Rails.application.configure do
# Settings specified here will take precedence over those in config/application.rb.
# In the development environment your application's code is reloaded any time
# it changes. This slows down response time but is perfect for development
# since you don't have to restart the web server when you make code changes.
config.cache_classes = false
# Do not eager load code on boot.
config.eager_load = false
# Show full error reports.
config.consider_all_requests_local = true
# Enable server timing
config.server_timing = true
# Enable/disable caching. By default caching is disabled.
# Run rails dev:cache to toggle caching.
if Rails.root.join("tmp/caching-dev.txt").exist?
config.action_controller.perform_caching = true
config.action_controller.enable_fragment_cache_logging = true
config.cache_store = :memory_store
config.public_file_server.headers = {
"Cache-Control" => "public, max-age=#{2.days.to_i}"
}
else
config.action_controller.perform_caching = false
config.cache_store = :null_store
end
# Store uploaded files on the local file system (see config/storage.yml for
options).
config.active_storage.service = :local
# Don't care if the mailer can't send.
config.action_mailer.raise_delivery_errors = true
config.action_mailer.delivery_method = :letter_opener
config.action_mailer.perform_deliveries = true
config.action_mailer.perform_caching = false
# Print deprecation notices to the Rails logger.
config.active_support.deprecation = :log
# Raise exceptions for disallowed deprecations.
config.active_support.disallowed_deprecation = :raise
# Tell Active Support which deprecation messages to disallow.
config.active_support.disallowed_deprecation_warnings = []
# Raise an error on page load if there are pending migrations.
config.active_record.migration_error = :page_load
# Highlight code that triggered database queries in logs.
config.active_record.verbose_query_logs = true
# Suppress logger output for asset requests.
config.assets.quiet = true
# Raises error for missing translations.
# config.i18n.raise_on_missing_translations = true
# Annotate rendered view with file names.
# config.action_view.annotate_rendered_view_with_filenames = true
# Uncomment if you wish to allow Action Cable access from any origin.
# config.action_cable.disable_request_forgery_protection = true
end
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 ("/")
root "flights#index"
resources :flights
resources :airports
resources :bookings
mount LetterOpenerWeb::Engine, at: "/letter_opener" if Rails.env.development?
end
if you still need more code here is a link to my github https://github.com/Michael-Mehta/odin-flight-booker