14 Apr 2012

Ruby: neo4j gem - LoadError: no such file to load -- active_support/core_ext/class/inheritable_attributes

I’ve been playing around with neo4j again over the past couple of days using the neo4j.rb gem to build up a graph.

I installed the gem but then ended up with the following error when I tried to 'require neo4j' in 'irb':

LoadError: no such file to load -- active_support/core_ext/class/inheritable_attributes
  require at org/jruby/RubyKernel.java:1033
  require at /Users/mneedham/.rbenv/versions/jruby-1.6.7/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36
   (root) at /Users/mneedham/.rbenv/versions/jruby-1.6.7/lib/ruby/gems/1.8/gems/neo4j-1.3.1-java/lib/neo4j.rb:9
  require at org/jruby/RubyKernel.java:1033
  require at /Users/mneedham/.rbenv/versions/jruby-1.6.7/lib/ruby/gems/1.8/gems/neo4j-1.3.1-java/lib/neo4j.rb:59
   (root) at src/main/ruby/neo_test.rb:2

It seems a few others have come across this problem as well and the problem seems to be that ActiveSupport 3.2 isn’t yet supported by the gem so we need to use an earlier version of that.

There were a few suggestions in the comments but it was the following that worked for me:

sudo gem uninstall railties
sudo gem install railties --version 3.1

About the author

I'm currently working on short form content at ClickHouse. I publish short 5 minute videos showing how to solve data problems on YouTube @LearnDataWithMark. I previously worked on graph analytics at Neo4j, where I also co-authored the O'Reilly Graph Algorithms Book with Amy Hodler.