I have a Ruby app that runs on a server with no web interface. It is run using the command line(ruby path/to/file.rb).
I have classes in different files that I want to be accessible. The files are located in the "app/classes" directory.
I put this in the application.rb file:
config.autoload_paths += Dir["#{config.root}/classes"]
and I get an uninitialized constant error.
I can put in "require_relitive 'somefile'" but I would rather not have to do this for every class that is used. How do I create an autoload path and where should it be located at?
Use require_all
See https://github.com/jarmo/require_all
It basically allows you to write this:
require 'require_all'
require_all 'app/classes'
And all ruby files in app/classes will be loaded.
Related
Forgive my inexperience with Ruby, but I am unable to run a script within a third-party project with the following structure:
˅ alpha
˅ lib
˅ bravo
golf.rb
˅ charlie
˃ delta
˅ echo
foxtrot.rb
require "charlie/delta/echo/__init"
__init.rb
require "bravo/golf"
What should my command-line be to run the script, 'foxtrot.rb', as the following generates an error:
ruby "c:\arby\lib\bravo\charlie\delta\echo\foxtrot.rb"
"'require': cannot load such file -- charlie/delta/echo/__init (LoadError)"
If this is the code inside of __init.rb, it won't work.
require "charlie/delta/echo/__init"
__init.rb
require "bravo/golf"
require tells ruby to load the code inside a ruby file. In order for it to work, the files need to be organized correctly. You can also use require_relative but they still need a relative path from the file calling them. See What is the difference between require_relative and require in Ruby?
Say that my gem is VideoPlayer. The folders tructure is:
VideoPlayer/
/bin
vidplay.rb
/lib
VideoPlayer.rb
Subtitler.rb
Screenshotter.rb
I want people to invoke vidplay from the command line, and for vidplay to reference code in the VideoPlayer, Subtitler and Screenshotter files.
If I just write, within vidplay.rb, require '../lib/VideoPlayer.rb', it will throw an error, saying that it cannot require such file. I thought "Maybe it automatically requires everything in lib/", but it apparently doesn't; if I don't require anything, it'll say that VideoPlayer is an uninitialised constant.
So how does this work?
I usually add the lib dir to the library load path ($:). You can add this to the top of your bin file.
lib = File.expand_path('../../lib', __FILE__)
$:.unshift(lib) unless $:.include?(lib)
Then you can do a normal require:
require 'videoplayer'
Hope this helps.
I have written a few ruby classes. However, when trying to access one from another directory I am getting the following error:
uninitialized constant Main::AppVersion
This is what the directory structure looks like:
home --> a --> app_version.rb
home --> b --> c --> lib --> main.rb (and other classes)
Everything within "lib" can see each other. However, when trying to access app_version, it fails. I added the path to app version (home/a) to the $LOAD_PATH. So it should be available from there. I have also tried "requiring" my other class, but when I do that I get the following error:
LoadError: no such file to load -- AppVersion
Any idea on what I could be doing wrong here would be highly appreciated. Thanks!
Can try using require_relative:
require_relative '../../../a/app_version'
You error is:
LoadError: no such file to load -- AppVersion
So require is looking for a file AppVersion.rb. And you said the file name is app_version.rb. Try to load it with:
require 'app_version'
after setting up the $LOAD_PATH.
When you define Main::AppVersion class it's supposed to reside in main folder (i.e. main/app_version.rb)
So it doesn't depend on $LOAD_PATH.
You will have to require the file.
LoadError: no such file to load -- AppVersion
Do you require "app_version" ? Or require "AppVersion"? (first one is correct, and consider to require_relative)
Another option is to run ruby and give the include path like
ruby -Ia -Ib/c/lib b/c/lib/main.rb
.
I wrote a ruby class that I want to use in other applications that I have. I put it in the same directory c:\apps that I have my other applications in. When I require my class it says that:
`require': no such file to load --
Even though the file is in the same directory as the application I am running. I am simply doing a :
require 'fileformat'
ok, so I did /apps/fileformat and it worked
I think I'm missing something here. I have a directory like this:
myapp
|-lib
|-package1
|-dostuff.rb
|-package2
|-dostuff.rb
From an irb console I'm trying to test the library before I add it to my real project (a Rails app). However, typing this:
require 'lib/package1/dostuff'
returns an error saying it can't find the file to load. I added the lib directory to the load path but I'm not able to load the file.
What am I forgetting? The two filenames don't have to be the same but that's how they are to begin with (they are auto-generated from some web services I need to call using soap4r; each package represents a different web service API group)
If the directory "lib" is in the load path, the argument to require must be relative to lib. So require 'package1/dostuff' without the lib, otherwise it will look for lib/lib/package1/dostuff.rb.
In Ruby 1.9 there's the new require_relative method, which would let you do require_relative "../package2/dostuff" from within package1/dostuff.rb.