Interact with Rails via Runner
The rails runner feature of the Ruby on Rails command line interface is pretty awesome.
The documentation states:
runnerruns Ruby code in the context of Rails non-interactively.
Use it like the ruby command to execute Ruby code in the context of your Rails environment. Take this file:
# rails_runner_in_action.rb
puts Developer.count # 5
puts Post.count # 40
puts Channel.count # 17
And run it with:
$ rails runner rails_runner_in_action.rb
5
40
17
It also runs Ruby code right in the terminal, so this works (rails r is an alias):
$ rails r "puts Developer.count"
5
http://guides.rubyonrails.org/command_line.html#rails-runner
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