ruby - Sinatra app cannot find ActiveRecord tables -

i'm writing ruby app using rack, sinatra, active record, , sqlite3 (in-memory). setup in-memory db follows:

class mydatabase      def self.init         activerecord::base::establish_connection(           :adapter  => 'sqlite3',           :database => ':memory:'         )          activerecord::schema::define             unless activerecord::base::connection.data_sources.include? 'my_table'                 create_table :my_table |table|                     table.column :age, :integer                     table.column :name, :string                 end             end         end     end  end 

then in rack config file call:

mydatabase::init()  run rack::urlmap.new(     '/api/v1/some_route' => mycontroller.new ) 

however, if create connection database inside controller class , list of tables, it's empty. how can make application/sinatra controllers use tables create in mydatabase class?

the controllers declared as

mycontroller < sinatra::base 

i've taken @ https://github.com/janko-m/sinatra-activerecord. against using i'd isolate database logic separate "data" layer (directory) in project (like mvc), hoping call setup logic rack config file @ startup.