Multi-tenancy and sub domain(lvh) with rails

Simple multi-tenancy with the help of acts_as_tenant

multi-tenancy reference

ErwinM/acts_as_tenant

Multi-tenancy in Ruby on Rails — many tenants in one application

Multi-tenant Architecture with PostgreSQL Schemas- RailsCarma -Ruby On Rails Development Company…

lvh.me reference

reinteractive | Blog | Developing and testing Rails applications with subdomains

Dynamic request matching

ActionDispatch::Routing::Mapper::Scoping

author.rb

class Author < ApplicationRecord
end

post.rb

class Post < ApplicationRecord
 acts_as_tenant(:author)
end

From console

> Author.create(name: 'Rob')
> Author.create(name: 'David')
> ActsAsTenant.current_tenant = Author.find_by(name: 'Rob')
> Post.create(content: "Rob's article")
> Post.all
  
 => #<ActiveRecord::Relation [#<Post id: 1, content: "Rob's article", created_at: "2019-06-01 07:46:31", updated_at: "2019-06-01 07:46:31", author_id: 1>]>
> ActsAsTenant.current_tenant = Author.find_by(name: 'David') 
> Post.all => #<ActiveRecord::Relation []>

routes.rb

Rails.application.routes.draw do
constraints(SubdomainRequired) do
  resources :comments
  resources :posts
    end   
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end

config/intializers/subdomain_required.rb

class SubdomainRequired
  def self.matches?(request)
    subdomain = request.subdomains.first
    tenant = Author.find_by subdomain: subdomain
    subdomain.present? && tenant
  end
end

application_controller.rb

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  
  set_current_tenant_through_filter
  before_action :current_tenant_from_subdomain
def current_tenant_from_subdomain
    tenant = Author.find_by subdomain: request.subdomains.first
    set_current_tenant(tenant)
  end
end

Console

#<ActiveRecord::Relation [
#<Author id: 1, name: "Rob", created_at: "2019-06-01 07:45:08", updated_at: "2019-06-01 10:16:27", subdomain: "drob">,
#<Author id: 2, name: "David", created_at: "2019-06-01 07:45:09", updated_at: "2019-06-01 10:16:42", subdomain: "dd">]>
<ActiveRecord::Relation [
#<Post id: 1, content: "Rob's article", created_at: "2019-06-01 07:46:31", updated_at: "2019-06-01 07:46:31", author_id: 1>,
#<Post id: 2, content: "David article", created_at: "2019-06-01 07:48:42", updated_at: "2019-06-01 07:48:42", author_id: 2>]>

open browser and hit

http://drob.lvh.me:3000/

http://drob.lvh.me:3000/posts

shows only Rob’s posts

http://dd.lvh.me:3000/posts

shows only David’s posts

above links will work

http://test.lvh.me:3000/posts
will not work no such subdomain

Sample code repo is here