ROR_multi_DB generated by chatgpt

# generated by chatgpt
# Configure your config/application.rb to handle subdomains:

# config/application.rb
module YourAppName
  class Application < Rails::Application
    config.middleware.use SubdomainMiddleware
    # ... other configurations
  end
end


# Create a custom middleware (SubdomainMiddleware) to handle subdomains and switch tenants based on subdomains. You can create a new file for this middleware, e.g., lib/subdomain_middleware.rb:

# lib/subdomain_middleware.rb
class SubdomainMiddleware
  def initialize(app)
    @app = app
  end

  def call(env)
    request = ActionDispatch::Request.new(env)
    subdomain = request.subdomain

    if subdomain.present?
      # Implement your logic to determine the tenant based on the subdomain
      # You might want to look up the tenant's database configuration in a custom way
      # For this example, we'll assume a simple mapping of subdomains to tenant databases

      tenant_database = subdomain_to_database(subdomain)

      if tenant_database
        ENV['TENANT_SUBDOMAIN'] = subdomain
        # Switch to the tenant's database
        switch_database(tenant_database)
      else
        # Handle invalid subdomains or show an error page
        return [404, { 'Content-Type' => 'text/html' }, ['Invalid subdomain']]
      end
    end

    @app.call(env)
  ensure
    # Restore the default database connection after the request is processed
    ActiveRecord::Base.connection_handler.clear_active_connections!
  end

  private

  def subdomain_to_database(subdomain)
    # Implement your logic to map subdomains to tenant databases
    # For simplicity, you can use a hash or a database table to store this mapping
    # Return the tenant's database name based on the subdomain
  end

  def switch_database(database)
    # Connect to the specified tenant database
    ActiveRecord::Base.establish_connection(ActiveRecord::Base.connection_config.merge(database: database))
  end
end

# Implement the subdomain_to_database method to map subdomains to tenant databases. You can use a database table or a configuration file to store this mapping.

# Make sure to create separate controllers, views, and logic for the public site and tenant-specific sites as needed.

# database.yml

# config/database.yml
default: &default
  adapter: postgresql
  encoding: utf8
  pool: 5
  username: your_db_username
  password: your_db_password
  host: localhost

development:
  <<: *default
  database: your_app_development

test:
  <<: *default
  database: your_app_test

production:
  <<: *default
  database: your_app_production

<% if ENV['TENANT_SUBDOMAIN'].present? %>
<%= ENV['TENANT_SUBDOMAIN'] %>:
  <<: *default
  database: <%= ENV['TENANT_SUBDOMAIN'] %>_database
<% end %>