ClosureTree inside other gem

[Exelord]

Hi @mceachen,
Im working on Hierarchical access management system with roles inheritance gem and I want to use your solution. But...

When I have sth like (example bellow) inside my gem's model file

require 'closure_tree'

class Hierarchy < ActiveRecord::Base
  has_closure_tree
end

I always get:

/usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:570:in `retrieve_connection': No connection pool for Hierarchy (ActiveRecord::ConnectionNotEstablished)
    from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/connection_handling.rb:113:in `retrieve_connection'
    from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/connection_handling.rb:87:in `connection'
    from /usr/local/lib/ruby/gems/2.2.0/gems/closure_tree-6.0.0/lib/closure_tree/support_attributes.rb:60:in `quoted_hierarchy_table_name'
    from /usr/local/lib/ruby/gems/2.2.0/gems/closure_tree-6.0.0/lib/closure_tree/model.rb:14:in `block in <module:Model>'
    from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/concern.rb:120:in `class_eval'
    from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/concern.rb:120:in `append_features'
    from /usr/local/lib/ruby/gems/2.2.0/gems/closure_tree-6.0.0/lib/closure_tree/has_closure_tree.rb:25:in `include'
    from /usr/local/lib/ruby/gems/2.2.0/gems/closure_tree-6.0.0/lib/closure_tree/has_closure_tree.rb:25:in `has_closure_tree'

Do you maybe know how can I fix it? I will be very appreciate :)

[tomalok]

@Exelord seems you came across something similar to what I'm currently experiencing in #223 -- were you able to track down / fix your issue?

[Exelord]

Yep, fortunately :)
Please take a look at my gem: Monarchy

I cannot initialize closure_tree during gem loading cuz of no database connection, so I moved the part with acts_as_tree to an app folder, which is automatically merged with project's app folder.

And it is working very well :)

[tomalok]

hm... this is already in the app directory tree, not being packaged by a gem.

i did a bit of troubleshooting late yesterday -- a my original proof-of-concept code worked (but was a sinatra app, it's now a CLI app). I got the new app working when I added sinatra-activerecord to the Gemfile. Presumably that's adding some necessary initialization, haven't figured out what that might be, yet.