Heroku deployment for Ruby / Sinatra / Postgres app "PG::ConnectionBad" - ruby

Question

I’ve deployed my Ruby app on Heroku, however when looking to register or login I’m having an internal server error. My app is built on Sinatra and Rake.
When doing heroku logs -tail I’m having the following error message:
PG::ConnectionBad - connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: No such file or directory
Is the server running locally and accepting connections on that socket?
I installed the heroku Postgres add-on. I migrated my db with the following command:
heroku pg:push makersbnb DATABASE --app makersbnb-challenge
Here is one of my lib file with my PG connections:
require 'bcrypt'
class User
attr_reader :user_id, :username
def initialize(user_id:, username:)
#user_id = user_id
#username = username
end
def self.register(username:, password: )
if ENV['ENVIRONMENT'] == 'test'
connection = PG.connect(dbname: "makersbnb_test")
else
connection = PG.connect(dbname: 'makersbnb')
end
encrypted_password = BCrypt::Password.create(password)
result = connection.exec_params("INSERT INTO users (username, password)
VALUES ($1, $2)
RETURNING user_id, username, password;",[username, encrypted_password])
User.new(user_id: result[0]['user_id'], username: result[0]['username'])
end
def self.authenticate(username:, password:)
if ENV['ENVIRONMENT'] == 'test'
connection = PG.connect(dbname: "makersbnb_test")
else
connection = PG.connect(dbname: 'makersbnb')
end
result = connection.query(
"SELECT * FROM users WHERE username = $1",
[username]
)
return unless result.any?
return unless BCrypt::Password.new(result[0]['password']) == password
User.new(user_id: result[0]['user_id'], username: result[0]['username'])
end
end
Here is my Gemfile:
source "https://rubygems.org"
ruby '3.1.0'
gem "sinatra"
gem "sinatra-contrib"
gem "rake"
gem 'pg'
gem 'webrick'
gem 'bcrypt'
gem 'rack-flash3'
gem "sinatra-activerecord" # for Active Record models
gem 'capybara', group: :test
gem 'rspec', group: :test
I also created a database.yml file based on other instructions I read but I'm not sure if it applies in this case:
# database.yml file
default: &default
adapter: postgresql
encoding: unicode
pool: 5
test:
<<: *default
database: makersbnb_test
production:
<<: *default
database: makersbnb
Here is the repo
Here is the app
Help!

Answer 1

I will try to explain the problem, but also point some other flaws of Your current approach
To connect to remote database You should specify some options in
connection = PG.connect(dbname: "makersbnb")
You should specify not only dbname option but also:
host
user
password
Those can be retrieved from heroku postgresql config
connection = PG.connect(dbname: "makersbnb", host: <db_host>, user: <db_user>, password: <db_password>)
REMEMBER DON'T SET THOSE VALUES IN YOUR CODE
Instead You can use env variables.
Your config file is not doing anything in this approach
In the script You also don't use ActiveRecord. To do so Your model class should inherit from ActiveRecord::Base, something like this:
class User < ActiveRecord::Base
end
Here You can find some information how to use ActiveRecord without Rails framework: https://www.devdungeon.com/content/ruby-activerecord-without-rails-tutorial
And also some more information how to use it in sinatra specifically:
https://github.com/sinatra-activerecord/sinatra-activerecord