Rails server does not start due to lack of pg gem. Uninstall postgres, but I get the same error

Question

I get an error when I try to start the Rails 5 server.

The specified 'postgresql' for the database adapter, but this stone is not loaded. Add gem 'pg'to your Gemfile (and make sure its version is at least) is required for ActiveRecord).

I deleted local postgres via brew, also deleted my existing mac application. This is my gemfile

source 'https://rubygems.org'

gem 'rails',        '5.0.0'
gem 'puma',         '3.4.0'
gem 'sass-rails',   '5.0.6'
gem 'uglifier',     '3.0.0'
gem 'coffee-rails', '4.2.1'
gem 'jquery-rails', '4.1.1'
gem 'turbolinks',   '5.0.0'
gem 'jbuilder',     '2.4.1'

group :development, :test do
  gem 'sqlite3'
  gem 'byebug',  '9.0.0', platform: :mri
end

group :development do
  gem 'web-console',           '3.1.1'
  gem 'listen',                '3.0.8'
  gem 'spring',                '1.7.2'
  gem 'spring-watcher-listen', '2.0.0'
end

group :production do
  gem 'pg'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

I used

install the package - no production

But I still get the same error. Can anyone help?

Thanks, Zin

Answer 1

, rails postgres db. database.yml postgres. , , , prod. . ( !)

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Gemfile:

group :development, :test do
  # Use sqlite3 as the database for Active Record
  gem 'sqlite3'
end

group :production do
  # Use postgresql as the database for Active Record
  gem 'pg', '~> 0.18'
end

config/database.yml:

postgres: &postgres
  adapter: postgresql
  encoding: unicode
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>

sqlite: &sqlite
  adapter: sqlite3
  pool: 5
  timeout: 5000

development:
  <<: *sqlite
  database: db/development.sqlite3

test:
  <<: *sqlite
  database: db/test.sqlite3

production:
  <<: *postgres
  database: postgresapp_production
  username: postgresapp
  password: <%= ENV['POSTGRESAPP_DATABASE_PASSWORD'] %>

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