ruby - Sqlite+ Sinatra - Database file is not getting created with DataMapper.setup -


i creating 1 web application in sinatra , sqlite. using below code create sqlite database through sinatra-

datamapper.setup(:default, "sqlite3://#{dir.pwd}/development.db")

i not getting errors while creating entry in database through web application not able find "development.db" file in current folder , it's not there in other folders.

please suggest might issue. whole code - 

require 'dm-core' require 'dm-migrations'  datamapper.setup(:default, "sqlite3://#{dir.pwd}/development.db")   class student   include datamapper::resource   property :row_id, serial   property :first_name, string   property :last_name, string   property :scu_email, string   property :registered_on, date   property :program_name, string   property :specialization, string   property :expected_grad_year, string   property :courses, text   property :username, string   property :password, string end  datamapper.finalize student.auto_migrate!

try replacing dir.pwd __dir__ or file.expand_path(__dir__)


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