when console is launched
while at console prompt

How it should work?

See the output here. Simple, quick methods. T.me (current tenant), T.names (tenants in the DB), ...

Launch, ask for tenant selection, set

$ bin/rails c
Running via Spring preloader in process 11233
Loading development environment (Rails 5.1.5)
   (1.9ms)  SELECT "public"."tenants"."subdomain" FROM "public"."tenants" WHERE "public"."tenants"."deleted_at" IS NULL ORDER BY "public"."tenants"."created_at" DESC
Available tenants: {0=>"public", 1=>"local"}
Select tenant: 1
You are now Tenant 'local'

Frame number: 0/24

Switch tenant

[1] [my-project][development] pry(main)> T.ask
Available tenants: {0=>"public", 1=>"local"}
Select tenant: 0
You are now Tenant 'public'
=> nil

Switch again

[2] [my-project][development] pry(main)> T.ask
Available tenants: {0=>"public", 1=>"local"}
Select tenant: 1
You are now Tenant 'local'
=> nil

Current tenant

[3] [my-project][development] pry(main)> T.me
=> "local"

Tenant we can quickly switch to

[4] [my-project][development] pry(main)> T.hash
=> {0=>"public", 1=>"local"}

Tenant names

[5] [my-project][development] pry(main)> T.names
=> ["local"]

Is `abc` a tenant?

[6] [my-project][development] pry(main)> T.exists? 'abc'
=> false

Is `local` a tenant?

[7] [my-project][development] pry(main)> T.exists? 'local'
=> true

Put it inside <project-root>/.pryrc

# What is it?
#   => Helper methods for Apartment::Tenant gem
# How does it work?
#   * bin/rails console => auto-loads and asks to switch tenant
#   * T.ask             => anytime in console, to switch tenant from a list
#   * T.me              => same as Apartment::Tenant.current
#   * T.hash            => hash of tenants. Example: { 0 => "public", 1 => "tenant-a" }
#   * T.names           => array with all existing tenant names from DB
#   * T.exists?(arg)    => returns true/false if `arg` exists as tenant in DB
#   * T.switch!(arg)    => same as Apartment::Tenant.switch!
require "rubygems"

# convenience class
class T
  class << self
    # ['tenant1', 'tenant2', ...]
    def names
      @@names ||= Apartment.tenant_names.sort
    end

    # { 0 => 'public', 1 => 'tenant1', ...}
    def hash
      @@hash ||= { 0 => 'public' }.merge(
        (1..(T.names.length)).to_a
        .product(T.names)
        .to_h
      )
    end

    def switch! arg
      Apartment::Tenant.switch!(arg) if T.hash.value?(arg)
    end

    # current tenant
    def me
      Apartment::Tenant.current
    end

    def exists? arg
      T.names.include? arg
    end

    # ask to switch the tenant
    def ask
      WelcomeClass.select_tenant
    end
  end
end

# select tenant when entering console
class WelcomeClass
  def self.select_tenant
    puts "Available tenants: #{T.hash}"

    print "Select tenant: "
    tenant = gets.strip # ask which one?

    unless tenant.empty?
      # by name
      if T.exists?(tenant)
        T.switch!(tenant)

      # by index position
      # string has digit + tenant index present
      elsif tenant[/\d/].present? && T.hash.key?(tenant.to_i)
        T.switch!(T.hash[tenant.to_i])

      # not found = no action
      else
        puts "Tenant not found in list '#{tenant}'"
      end
    end

    # announce current tenant
    puts "You are now Tenant '#{T.me}'"
  end
end

# run the code at `bin/rails console`
Pry.config.exec_string = WelcomeClass.select_tenant