Rails: Console Tips

rails_console_tips.rb

# _ last return value
[1, 2, 3]
a = _

# avoid return value
a = (1..100000).to_a; nil

# reloading the console
reload!

# 'app' method for requests, responses, routes etc
app.get '/app.json'
app.response.body

app.some_path

# 'helper' method for all the helpers ActionView knows about
helper.truncate('Something', length: 4)
helper.link_to 'Some', app.some_path

# 'c' method for rails, rake, test commands
# https://github.com/rails/commands/
c.generate 'scaffold post title:string'
c.rake 'db:migrate'
c.test 'models/person'