Question

to install active_admin – I updated my gems, did

rails generate active_admin:install
rake db:migrate

and then I want to go localhost:3000/admin

and I get this error page

ArgumentError in Active_admin/devise/sessions#new

Showing D:/Ruby192/lib/ruby/gems/1.9.1/gems/activeadmin-0.3.2/app/views/layouts/active_admin_logged_out.html.erb where line #9 raised:

different prefix: "D:/" and "C:/project/app/assets/stylesheets"
  (in C:/project/app/assets/stylesheets/active_admin.css.scss)
Extracted source (around line #9):

6:   <title><%= [@page_title, active_admin_application.site_title].compact.join(" | ") %></title>
7: 
8:   <% ActiveAdmin.application.stylesheets.each do |path| %>
9:     <%= stylesheet_link_tag path %>
10:   <% end %>
11:   <% ActiveAdmin.application.javascripts.each do |path| %>
12:     <%= javascript_include_tag path %>
Rails.root: C:/project

Application Trace | Framework Trace | Full Trace
Request

Parameters:

None
Show session dump

Show env dump

Response

Headers:

None

Note that the project folder and ruby folder are indeed in different drives (never thought it matters)

Update:

I have found this http://github.com/rails/rails/issues/660 which seems to be the same error with a solution, yet I don’t understand what needs to be done for the error to go away.

Please help 🙂

Answer 1

I use Window XP sp3 to work with Rails

• The path of my Ruby Installer is C:\Ruby193
• The path of my project is D:\rails_projects\myApp

The solution:

Get “Junction.exe”, in Windows Vista used to “mklink”

• Download junction.exe
• Copy Junction.exe to C:\Windows\System32\

Create simbolic link

• Write into your console “C:\> junction C:\myApp D:\rails_projects\myApp
  “

Run the myApp

• C:\> cd myApp
• C:\myApp> rails server
• Go to http://localhost:3000/admin

It’s Ok..!!!!