invoke active_record
create db/migrate/20150626235457_create_articles.rb
create app/models/article.rb
BLAH, BLAH, BLAH
zepho-mac-pro:blog zepho$ rake db:migrate
== 20150626235457 CreateArticles: migrating ===================================
-- create_table(:articles)
-> 0.0015s
== 20150626235457 CreateArticles: migrated (0.0016s) ==========================
zepho-mac-pro:blog zepho$ rails c
Loading development environment (Rails 4.2.3)
2.2.2 :001 > Article
=> Article (call 'Article.connection' to establish a connection)
2.2.2 :002 > Article.count
(0.1ms) SELECT COUNT(*) FROM "articles"
=> 0
