What do I need to do to activate activerecord-import?

Question

I am trying to use activerecord-import, but I cannot get my application to recognize its existence.

I get

undefined method `supports_import?' for #<Class:...> 

or

 undefined method `import' for #<Class:...> 

no matter what i do. I searched for this for several days and tried everything I could come up with

It worked when we had rails 2.3.5 and ar extensions, but since the upgrade to rails 3.2 it has been broken.

Everyone says the solution is to use activerecord-import, but I don't seem to know how to do this. I installed the gem - I believe the correct version for my version of ActiveRecord - and I demanded it in my code, but I need to do something else.

I have this in my gemfile:

 gem 'activerecord-import', "~> 0.3.0" 

this is in my code:

 require 'activerecord-import' 

and this is my list of gems:

 $ gem list *** LOCAL GEMS *** actionmailer (3.2.13) actionpack (3.2.13) active_utils (2.0.0, 1.0.5) activemerchant (1.38.1, 1.37.0, 1.34.1) activemodel (3.2.13) activerecord (3.2.13) activerecord-import (0.3.1) activeresource (3.2.13) activesupport (3.2.13) acts_as_tree (1.1.0) arel (3.0.2) builder (3.0.4) bundler (1.2.1) capistrano (2.15.5) ckeditor (4.0.6) climate_control (0.0.3) cocaine (0.5.1) coffee-rails (3.2.2) coffee-script (2.2.0) coffee-script-source (1.6.3) composite_primary_keys (5.0.13) dbf (2.0.6) erubis (2.7.0) exception_notification (3.0.1) execjs (2.0.1, 1.4.0) fastercsv (1.5.5) friendly_id (4.0.10.1) highline (1.6.19) hike (1.2.3) i18n (0.6.1) journey (1.0.4) jquery-rails (3.0.4) json (1.8.0) libv8 (3.16.14.3 x86_64-linux, 3.11.8.17 x86_64-linux) mail (2.5.4) mime-types (1.25, 1.23) mini_magick (3.6.0) mini_portile (0.5.1) money (5.1.1) multi_json (1.8.0, 1.7.9, 1.7.7) mysql2 (0.3.13) net-scp (1.1.2) net-sftp (2.1.2) net-ssh (2.6.8) net-ssh-gateway (1.2.0) newrelic_rpm (3.6.7.152) nokogiri (1.6.0, 1.5.10) orm_adapter (0.5.0) paperclip (3.5.1, 3.5.0) polyglot (0.3.3) rack (1.4.5) rack-cache (1.2) rack-ssl (1.3.3) rack-test (0.6.2) rails (3.2.13) railties (3.2.13) rake (10.1.0, 0.9.2.2) rdoc (3.12.2) ref (1.0.5) rmagick (2.13.2) rubygems-bundler (1.1.0) rvm (1.11.3.5) sass (3.2.10, 3.2.9) sass-rails (3.2.6) sprockets (2.2.2) sqlite3 (1.3.8) subexec (0.2.3) therubyracer (0.12.0, 0.11.4) thor (0.18.1) tilt (1.4.1) tinymce_fm (0.0.2) treetop (1.4.15, 1.4.14) tzinfo (0.3.37) uglifier (2.2.1, 2.1.2) will_paginate (3.0.4) zip (2.0.2) 

Answer 1

The answer is that to use this particular gem, you need to take some special steps.

  require "activerecord-import/base" ActiveRecord::Import.require_adapter('mysql2') 

This was found on the github wiki page for activerecord import