Undefined method `instance' for Capistrano::Configuration:Class

Question

I am trying to get Capistrano up and running for the first time in a rails app. I have a linux server running Ubuntu 12.04, nginx, unicorn and rails, however, I seem to be running into a few issues. I am also using Capistrano 3.0.0, rails 3.2.14, bundler 1.4.0 & ruby 1.9.3p448 using RVM. I only have a production stage set up and at this point in time and I'm only concerned with Capistrano communicating with my server and pushing my code from github ( No migrations and bundling etc just yet). When I try the command `cap production deploy:check` or `cap production deploy:setup` ( which seems to be deprecated?) with the setup below, I get the following error msg: I'm not really sure where to start on this error, and google doesn't suggest much. I have tried adding the `rvm-capistrano` gem but to no avail. How can I amend my code to address this error? ``` cap aborted! undefined method `instance' for Capistrano::Configuration:Class /Users/andrew/.rvm/gems/ruby-1.9.3-p448/gems/bundler-1.4.…

Accepted Answer

First of all, there were a couple of changes made in capistrano 3. See the release notes : http://www.capistranorb.com/2013/06/01/release-announcement.html

Also go through the readme. https://github.com/capistrano/capistrano/blob/master/README.md

Capistrano 3 has moved out bundler integration into a gem.To solve your problem :

```
 1. Uncomment require 'capistrano/bundler' from capify. 
 2. add gem 'capistrano-bundler' to your gemfile.
 3. Go through the comments in capify file and uncomment whichever module you require.
```

Oh and if you don't wanna use bundler as of yet, remove the first line : require "bundler/capistrano". easy as that.

Also you can't use variables like the previous way now.Instead of directly reading it, use fetch(:application) to read a variable.

I would be easier for you to move back to capistrano v2.

Undefined method `instance' for Capistrano::Configuration:Class

Solution

Problem