rack-contrib | Contributed Rack Middleware and Utilities | Application Framework library

Looks like you're running into compatibility issues trying to use the latest version of the activerecord-import gem at the time of writing (released in October 2020) with activerecord 3.2.22.5 (released in September 2016). You do mention it's a rails 3.2.15 app but you're not using activerecord 3.2.15 which is confusing.

Try using activerecord-import 0.4.1 (released in July 2013) and activerecord 3.2.15 which should be compatible with rails 3.2.15.

This is probably and error with the stylesheet_link_tag and stylesheet_pack_tag, check out your layout files probably you are including sass files and you are using stylesheet_link_tag, this is breaking your code given that as I understand you can just link plane css files. so if you are including sass files use the stylesheet_pack_tag

The root of the problem seems to be bundler. What operating system and Ruby version are you using? It may be a problem with old OpenSSL library, so you can not install bundler and everything after it.

If you are using jRuby (your gem list output tells so), your problem seems to be the same as described in link. And there is a solution as well.

Maybe you forgot to set 2.1.2 version of ruby as global? (rbenv set global 2.1.2)

RSpec doesn't load config.ru as it doesn't know what it is. You need to simulate what a web server would do. This approximates it for a rack test style setup. Including Rack::Test::API into your specs would allow you to use rack-test with a rackup file.

The exception:

Try running bundle update json to force update the json gem. If that doesn't work, you can run gem clean, delete your Gemfile.lock and run everything again.

Edit: It looks like your bundler version isn't compatible with your version of rails. You can try to downgrade bundler by running:

1. gem install bundler --version '1.14.6'
2. gem uninstall bundler --version '2.0.1'

Also, is this a new project? If so, you should consider using rails 5. Rails 3 is close to being three major versions behind with the release of rails 6 not too far away. It would help avoid a lot of these gem issues as well.

I solved this issue by also upgrading mongoid dependecies.

Apparently, Kaminari 1.0.1 is not compatible with mongoid-audit 1.0.2

You have namespaced OmniauthCallbacksController under users as Users::OmniauthCallbacksController, make sure the controller path is your_app/app/controllers/users/omniauth_callbacks_controller‌​.rb i.e., it resides under users folder. Similarly, your devise routes should look something like: