How to create migration to add the admin
field to the users
table with a boolean value and set default to false in Sinatra? I am using Active Record.
It's still just ActiveRecord, this would be no different than using it in Rails.
class AddAdminToUsers < ActiveRecord::Migration
def change
add_column :admin, :boolean, :default => false
end
end
You may also want to check out the sinatra-activerecord gem which will give you some extra rake tasks and makes things a little easier.
Here is also a useful article on using Sinatra with ActiveRecord.