Rails Core Dev Memo

rails-dev-box

• $ vagrant suspend suspend VM
• $ vagrant resume hack again
• $ vagrant halt shut down
• $ vagrant up boot it again
• $ vagrant status check status
• $ vagrant destroy # DANGER: all is gone wipe the virtual machine from the disk destroying all its contents

Tests

• Runnning single test separately
  • $ ARCONN=sqlite3 ruby -Itest test/cases/associations/has_many_associations_test.rb -n test_something_working
  • --name "full name with spaces" or --name /with/ when test 'something' do … end syntax
  • -v after the file name will output the test name
• Run tests
  • $ bundle exec rake test
• Run sqlite tests(activerecord)
  • $ bundle exec rake test_sqlite3
  • Others are test_mysql, test_mysql2, test_postgresql
• Run tests without warnings
  • $ RUBYOPT=-W0 bundle exec rake test

ActiveRecord

Thread

wtf is it :P

::Persistence

• private method, update_record and create_update are the key methods

::Scoping

::Default

• relation seems to be important.