Title: PgRls Rails Description: rails multitenancy with pg rls Author: dandush03 -->

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PgRls

PostgreSQL Row Level Security
The Rails right way to do multitenancy


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Table of Contents

It's time we start doing multitenancy right! You can avoid creating a separate Postgres schema/databases for each customer or trying to ensure the WHERE clause of every single query includes the particular company. Just integrate PgRls seamlessly to your application.

This gem will integrate PostgreSQL RLS to help you develop a great multitenancy application.

Required Installation

Installing

Add this line to your application's Gemfile:

gem 'pg_rls'

And then execute:

$ bundle install

Or install it yourself with:

$ gem install pg_rls

Instructions

rails generate pg_rls:install company #=> where company eq tenant model name

You can change company to anything you'd like, for example, tenant This will generate the model and inject all the required code

For any new model that needs to be under rls, you can generate it by writing 

rails generate pg_rls user #=> where user eq model name

and it will generate all the necesary information for you.

You can swtich to another tenant by using 

PgRls::Tenant.switch :app #=> where app eq tenant name

Don't forget to update how you want PgRls to find your tenant, you can set multiple options by modifying api/config/initializers/pg_rls.rb search_methods

You can add the following configuration to your Database Config File to improve performance and remove PgRls::SecureConnection from aplication_record.rb

# app/config/database.yml
<% def db_username
    return PgRls::SECURE_USERNAME unless ENV['AS_DB_ADMIN']

    Rails.application.credentials.dig(:database, :server_1, :username)
   end %>

...

development:
  <<: *default
  database: example_development
  username: <%= db_username %> # Apply this to production and all env including tests

...

Testing

Many application uses some sort of database cleaner before running thair spec so on each test that we run we'll have an empty state. Usually, those gems clear our user configuration for the database. To solve this issue, we must implement the following:

# spec/rails_helper.rb

...
# some database cleaning strategy

config.before(:suite) do
  # Create A Default Tenant and Grant Test User Credentials
  PgRls::Database::Prepared.grant_user_credentials
  # Create the tenant which in this example is company and we are using FactoryBot
  FactoryBot.create(:company, subdomain: 'app')
  # In this default case our initializer is set to search by subdomain so will use it
  PgRls::Tenant.switch :app
end

...

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/dandush03/pg_rls. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the PgRls project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.

Note

Currently we only support subdomain as a searcher but will soon integrate slug/domain and cookies support

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