rails_admin breaks everything, uninitialized constant Admin (NameError)

Question

What I try to archieve

I am writing a rails app that is mostly CRUD. I want to have an admin interface so that non-programmers should be able to control the content. I decided to go with the ready-made library rails admin, because it seems to be the one that offers the most of convention > configuration.

What goes wrong

Well, mostly everything.

Everytime I run a command that uses the rails configuration (it seems) it halts and gives me a long error. The errors I get in my shells are posted here if you can understand it better than I do.

If I do another rails command, such as rails g model Admin it fails in the same manner, complaining uninitialized constant Admin (NameError).

This is my Gemfile.

How it got this bad

I was strolling along, whistling and having a jolly time. Created a ruby application, installed Devise and set up the User class with it, scaffolded a few CRUD MVC's, made a few custom controllers-views. I know that the gem 'will_paginate' is in conflict with 'rails_admin', so I removed it from my gemfile and instead went with 'kaminari'.

Who I suspect

Erik. No, I'm sure he's great. But rails_admin obviously did not play nice with my app. I suspect this has something to do with me not creating an 'Admin' model before installing the gem. But I can't fix it now, since I get theese errors (and I get errors even if I remove rails_admin from the gemfile, do a bundle and then try to rails g).

Answer 1

Have you removed the rails_admin generated route from config/routes.rb:

devise_for :admins
mount RailsAdmin::Engine => '/rails_admin', :as => 'rails_admin'

That is what is causing Devise to look for an Admin model. Removing that, along with removing the gem and initializer file should remove the whole thing from your project.