ruby sidekiq `require': cannot load such file -- pg (LoadError)

Question

I try to build a microservice on pure ruby with some additional features. I use sidekiq for jobs and pg for DB connection.

To start the Sidekiq server I use default settings and code:

# ./config/sidekiq.rb

require 'sidekiq'
require 'pg'  # This doesn't work with "`require': cannot load such file -- pg (LoadError)"
require_relative '../jobs/location_jobs/collect_job' # here is my job locates

# If your client is single-threaded, we just need a single connection in our Redis connection pool
Sidekiq.configure_client do |config|
  config.redis = { url: 'redis://localhost:6379/0', namespace: 'analytic_serv', size: 5 }
end

# Sidekiq server is multi-threaded so our Redis connection pool size defaults to concurrency (-c)
Sidekiq.configure_server do |config|
  config.redis = { url: 'redis://localhost:6379/0', namespace: 'analytic_serv' }
end

As you can see I try require PG gem in sidekiq.rb. Actually I use it in another file and use it here only for example.

So, when I try to run my sidekiq-server it raises an exception

bundle exec sidekiq -r ./config/sidekiq.rb -C ./config/sidekiq.yml

analytic_serv/config/sidekiq.rb:2:in require': cannot load such file -- pg (LoadError)`

it works for the simple ruby script that I use for creating job, but it doesn't work when I run sidekiq-server.

Please, help. What am I doing wrong? How can I include a gem in this case?

Answer 1

Try adding gem 'pg' to your Gemfile, and install bundle via bundle install.