writing-migrations-v-000-master.zip （19个子文件） 
writing-migrations-v-000-master config 
environment.rb 491B db migrate 01_create_students.rb 56B schema.rb 771B Rakefile 451B app models student.rb 39B CONTRIBUTING.md 2KB Gemfile 179B Gemfile.lock 1KB .rspec 53B spec 02_add_column_spec.rb 765B 01_create_table_spec.rb 382B 03_change_column_spec.rb 727B spec_helper.rb 178B LICENSE.md 1KB .gitignore 642B .learn 71B lib support db_registry.rb 271B connection_adapter.rb 300B README.md 3KB资源评论
