uninitialized constant Moped::BSON in rails 4 app on heroku

Question

I just updated from rails 3 to rails 4. Everything works locally, but deployed on heroku, I get the following error:

ActionView::Template::Error (uninitialized c         


        

Answer 1

The following worked for me:

add to Gemfile:

gem "bson"
gem "moped", github: "mongoid/moped"

bundle install

add to application.rb:

require "bson"
require "moped"
Moped::BSON = BSON

Answer from: https://github.com/mongoid/mongoid/issues/3455