Setting up database for the first time in ruby on rails - ruby-on-rails

Question

I am very much fresh in using Ruby on rails. I have cloned a git repo and trying to set up a PostgreSQL database in my local machine(Win 10).
Ruby version- 2.4.10
Rails - 5.2.0
I am using the below command
rake db:setup RAILS_ENV=development
Error Output -
rake aborted!
NoMethodError: undefined method `[]' for nil:NilClass
D:/ruby/reserves/config/environments/development.rb:41:in `block in <top (required)>'
D:/ruby/reserves/config/environments/development.rb:1:in `<top (required)>'
D:/ruby/reserves/config/environment.rb:5:in `<top (required)>'
Tasks: TOP => db:setup => db:schema:load_if_ruby => db:create => db:load_config => environment
(See full trace by running task with --trace)
In database.yml file there are three environments has been declared - Development/Production/test
development:
<<: *default
database: reserves-dev
username:****
password:****
host: localhost
/config/environments/development.rb:
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 on
# every request. 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/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.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
# Email
config.action_mailer.perform_caching = false
config.action_mailer.delivery_method = :smtp
config.action_mailer.perform_deliveries = true
config.action_mailer.raise_delivery_errors = true
config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }
config.action_mailer.smtp_settings = {
address: Rails.application.credentials[Rails.env.to_sym][:mailer][:address],
port: Rails.application.credentials[Rails.env.to_sym][:mailer][:port],
user_name: Rails.application.credentials[Rails.env.to_sym][:mailer][:username],
password: Rails.application.credentials[Rails.env.to_sym][:mailer][:password],
domain: Rails.application.credentials[Rails.env.to_sym][:mailer][:domain],
authentication: :plain
}
# NOTE: For email need to have authentication :login (instead of :plain) and
# the tls: true param, otherwise the server times out on password reset request.
Rails.application.config.middleware.use ExceptionNotification::Rack,
:ignore_crawlers => %w{Googlebot bingbot},
:ignore_exceptions => ['ActionController::InvalidCrossOriginRequest'] + ExceptionNotifier.ignored_exceptions,
:email => {
:email_prefix => "[ERROR] ",
:sender_address => %{"Arc Reserves" <noreply#*****.com>},
:exception_recipients => %w{info#****.com}
}
# Print deprecation notices to the Rails logger.
config.active_support.deprecation = :log
# 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
# Debug mode disables concatenation and preprocessing of assets.
# This option may cause significant delays in view rendering with a large
# number of complex assets.
config.assets.debug = true
# Suppress logger output for asset requests.
config.assets.quiet = true
# Raises error for missing translations
# config.action_view.raise_on_missing_translations = true
# Use an evented file watcher to asynchronously detect changes in source code,
# routes, locales, etc. This feature depends on the listen gem.
config.file_watcher = ActiveSupport::EventedFileUpdateChecker
end
How can I set the environment variable to development for setting the database in my local.
Any help is highly appreciated.
Thank you in advance.

Answer 1

Most likely this is because of the lines like:
Rails.application.credentials[Rails.env.to_sym][:mailer][:address]
Could you change it to something like that?
Rails.application.credentials.dig(:mailer, :address)