Rails Tenant schema switching with background jobs not working - ruby-on-rails

Question

Setting up a scheduled rake task using Whenever gem.
Required to switch to a specific schema (Using Apartment gem in my project)
Code in config/schedule.rb
env :PATH, ENV['PATH']
env :GEM_PATH, ENV['GEM_PATH']
set :output, "#{Whenever.path}/log/scheduler.log"
every 1.minute do
rake "db:my_task"
end
Code in lib/tasks/my_task.rake
namespace :db do
task :my_task => :environment do
Apartment::Tenant.switch("subdomain") do
#My Code here
end
end
end
Produces the following error in logs log/scheduler.logs
rake aborted!
Apartment::TenantNotFound: One of the following schema(s) is invalid: "subdomain" "public"
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/postgresql_adapter.rb:72:in `rescue in connect_to_new'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/postgresql_adapter.rb:65:in `connect_to_new'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:91:in `block in switch!'
/var/lib/gems/2.3.0/gems/activesupport-5.1.3/lib/active_support/callbacks.rb:97:in `run_callbacks'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:88:in `switch!'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:105:in `switch'
/home/user1/Desktop/SPERICORN/kidversity/lib/tasks/dynamic_age_setter.rake:4:in `block (2 levels) in <top (required)>'
/var/lib/gems/2.3.0/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
ActiveRecord::StatementInvalid: Could not find schema kochi
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/postgresql_adapter.rb:66:in `connect_to_new'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:91:in `block in switch!'
/var/lib/gems/2.3.0/gems/activesupport-5.1.3/lib/active_support/callbacks.rb:97:in `run_callbacks'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:88:in `switch!'
/var/lib/gems/2.3.0/gems/apartment-1.2.0/lib/apartment/adapters/abstract_adapter.rb:105:in `switch'
/home/user1/Desktop/SPERICORN/kidversity/lib/tasks/dynamic_age_setter.rake:4:in `block (2 levels) in <top (required)>'
/var/lib/gems/2.3.0/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
Tasks: TOP => db:dynamic_age_setter
(See full trace by running task with --trace)

Answer 1

you are missing ActiveRecord::Base.establish_connection.connection try this
sample code below :
namespace :debtor_email_data_fix do
desc 'update data'
task email_normalize_to_downcase: :environment do
create_connection_with_db
Apartment::Tenant.switch!('app')
Email.find_each do |t|
t.update(address: t.address.downcase)
end
end
task all: [:email_normalize_to_downcase] do
end
private
def create_connection_with_db
ActiveRecord::Base.establish_connection.connection
end
end