Is there a way to pass ruby file, foo.rb to rails console. Expected results would be after console starts rails environment to run file.
Or any other way which would allow me to execute file in rails environment, triggered from command prompt.
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Possible duplicate of How do I run a Ruby file in a Rails environment?Nick Roz– Nick Roz2016-09-07 17:27:45 +00:00Commented Sep 7, 2016 at 17:27
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7 Answers
Actually, the simplest way is to run it with load inside the rails console
load './path/to/foo.rb'
4 Comments
Dan Barron
This works great. But unless I'm doing something wrong, you do not have access to objects created inside the script. Any way to do that? The use case is to set up some objects, then interactively explore them. Is that possible?
grant
@DanBarron you can put in a debugger or binding.pry
zeitue
This is just like a Lisp REPL +1
Darpan
Noob help : ./path - is path relative to your rails project where your file resides.
In the meantime, this solution has been supported.
rails r PATH_TO_RUBY_FILE
Much simpler now.
2 Comments
karatedog
in which Rails versions?
Haris Krajina
I think 3+, I can confirm for 5.
You can use
bundle exec rails runner "eval(File.read 'your_script.rb')"
UPDATE:
What we also have been using a lot lately is to load the rails environment from within the script itself. Consider doit.rb:
#!/usr/bin/env ruby
require "/path/to/rails_app/config/environment"
# ... do your stuff
This also works if the script or the current working directory are not within the rails app's directory.
6 Comments
Haris Krajina
Thanks a lot that does a job! I am using Sublime Text 2 so now I will be able to trigger builds of rails classes and see output directly in IDE :)
valk
script/runner "eval(File.read 'your_script.rb')" for rails 2.3 :)
semiomant
you can use a similar pattern to run files inside the console:
f=File.new('path/to/file') to run use: f.rewind; eval f.readlines.join("\n");
Ajedi32
FYI you don't need the
eval(File.read ...) part anymore. Rails accepts a Ruby file as an argument to rails runner: Usage: rails runner [options] [<'Some.ruby(code)'> | <filename.rb>]
Richie Thomas
Update- as per @HarisKrajina's answer below, looks like
rails r path/to/filename.rb is functionally equivalent to the bundle exec rails runner command mentioned above. |
Consider creating a rake task.
For code that I need to create records or support migrations, for example, I often create a rake task like that from this answer. For example:
In lib/tasks/example.rake:
namespace :example do
desc "Sample description you'd see if you ran: 'rake --tasks' in the terminal"
task create_user: :environment do
User.create! first_name: "Foo", last_name: "Bar"
end
end
And then in the terminal run:
rake example:create_user
Comments
script/console --irb=pry < test.rb > test.log
simple, dirty, and block the process at the end, but it does the job exactly like I wanted.
Comments
Of these approaches mentioned earlier, none seemed clean and ideal like you would expect a standalone script to run (not get eval-ed or piped via < redirection), but finally this works perfect for me:
(for Rails 3)
Insert at the top of your script:
#!/usr/bin/env ruby
APP_PATH = File.expand_path(appdir = '/srv/staging/strat/fundmgr/config/application', __FILE__)
require File.expand_path(appdir + '/../boot', __FILE__)
require APP_PATH
# set Rails.env here if desired
Rails.application.require_environment!
# your code here...
Of course, set your own Rails app path in the APP_PATH line.
That way, I can avoid having to enter any interactive irb or rails c and can test my script.rb from the shell prompt, before eg. scheduling it in crontab.
It smoothly supports command-line parameters, too, and minimizes the levels of wrappers before getting to your code.
CREDIT (also shows a Rails 2 example)
http://zerowidth.com/2011/03/18/standalone-script-runner-bin-scripts-in-rails.html
Comments
Here's the hack I'm using:
rr() {
rails_root="$(bundle exec rails runner "puts Rails.root")"
rp="$(relpath "$1" "$rails_root")"
bundle exec rails runner "eval(File.read '$rp')"
}
relpath() {python -c "import os.path; print os.path.relpath('$1','${2:-$PWD}')";}
Example:
cd ~/rails_project/app/helpers
rr my_script.rb
Based on @moritz's answer here. I changed it, since the working directory for File.read is the Rails project root.
I know this is some serious heresy, using python to help a ruby script. But I couldn't find a relpath method built into ruby.
Credit: relpath() was taken from @MestreLion, Convert absolute path into relative path given a current directory using Bash
