Ruby On Rails Basic Variable

Question

I am trying to learn Ruby on Rails by playing around with stuff and I'm attempting to play around with Grit. However I am a bit confused coming from a PHP background where I get the repo stuff from. My code

class RepoController < ApplicationController
  require "grit"
  repo = Grit::Repo.new("blahblahblah")

  def index()
    puts YAML::dump(repo)
  end

  def show()
    repo.commits('master', 10)
    puts repo.inspect
  end
end

I am trying to dump out information on the objects, but I cannot seem to access the repo variable. My IDE and Ruby keep saying undefined local variable or method repo' and I don't know why it cannot access the repo variable, it's declared at the top of the class?

Mori · Accepted Answer · 2012-04-05 01:01:58Z

2

You've got scope problems. Try:

require 'grit'

class RepoController < ApplicationController
  def repo
    @repo ||= Grit::Repo.new("blahblahblah")
  end

  def index()
    puts YAML::dump(repo)
  end

  def show()
    repo.commits('master', 10)
    puts repo.inspect
  end
end

edited Apr 5, 2012 at 1:01

answered Apr 5, 2012 at 0:52

Mori

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Comments

mikewilliamson · Accepted Answer · 2012-04-05 01:10:13Z

1

Your repo variable is being defined out of the scope that that is visible in your index and show actions. Probably what you want is something like this:

class RepoController < ApplicationController

  before_filter :set_repo  

  def index()
    puts YAML::dump(@repo)
  end

  def show()
    @repo.commits('master', 10)
    puts @repo.inspect
  end

  def set_repo
    @repo = Grit::Repo.new("blahblahblah")
  end
end

That creates an instance variable when the controller is loaded. Additionally you will want to get that require statement out of there and put gem "grit" in your Gemfile instead.

answered Apr 5, 2012 at 1:10

mikewilliamson

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