Cannot generate ERD for Spree 2.3

[schmijos]

Using Ruby 2.1.0, Rake 10.4.2, Spree 2.3.7 and rails-erd 1.1.0 I'm getting a lot of warnings and a breaking error when running rake erd. Do you have a hint on how to investigate that?

➜  renuo_spree git:(feature/2850) ✗ rake erd --trace
** Invoke erd (first_time)
** Invoke erd:generate (first_time)
** Invoke erd:options (first_time)
** Execute erd:options
** Invoke erd:load_models (first_time)
** Execute erd:load_models
Loading application environment...
** Invoke environment (first_time)
** Execute environment
Loading code in search of Active Record models...
** Execute erd:generate
Generating Entity-Relationship Diagram for 110 models...
Warning: Ignoring invalid association :prototype on Spree::OptionType::HABTM_Prototypes (model Spree::Prototype exists, but is not included in domain)
Warning: Ignoring invalid association :prototype on Spree::Property::HABTM_Prototypes (model Spree::Prototype exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::User (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :zone on Spree::ShippingMethod::HABTM_Zones (model Spree::Zone exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :product_option_types on Spree::OptionType (model Spree::ProductOptionType exists, but is not included in domain)
Warning: Ignoring invalid association :prototypes on Spree::OptionType (model Spree::Prototype exists, but is not included in domain)
Warning: Ignoring invalid association :product_option_types on Spree::Product (model Spree::ProductOptionType exists, but is not included in domain)
Warning: Ignoring invalid association :product_properties on Spree::Product (model Spree::ProductProperty exists, but is not included in domain)
Warning: Ignoring invalid association :tax_category on Spree::Product (model Spree::TaxCategory exists, but is not included in domain)
Warning: Ignoring invalid association :shipping_category on Spree::Product (model Spree::ShippingCategory exists, but is not included in domain)
Warning: Ignoring invalid association :line_items on Spree::Product (model Spree::LineItem exists, but is not included in domain)
Warning: Ignoring invalid association :sale_prices on Spree::Product (model Spree::SalePrice exists, but is not included in domain)
Warning: Ignoring invalid association :stock_movements on Spree::Product (model Spree::StockMovement exists, but is not included in domain)
Warning: Ignoring invalid association :prototypes on Spree::Property (model Spree::Prototype exists, but is not included in domain)
Warning: Ignoring invalid association :product_properties on Spree::Property (model Spree::ProductProperty exists, but is not included in domain)
Warning: Ignoring invalid association :country on Spree::Address (model Spree::Country exists, but is not included in domain)
Warning: Ignoring invalid association :state on Spree::Address (model Spree::State exists, but is not included in domain)
Warning: Ignoring invalid association :shipments on Spree::Address (model Spree::Shipment exists, but is not included in domain)
Warning: Ignoring invalid association :state_changes on Spree::Order (model Spree::StateChange exists, but is not included in domain)
Warning: Ignoring invalid association :line_items on Spree::Order (model Spree::LineItem exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::Order (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :return_authorizations on Spree::Order (model Spree::ReturnAuthorization exists, but is not included in domain)
Warning: Ignoring invalid association :adjustments on Spree::Order (model Spree::Adjustment exists, but is not included in domain)
Warning: Ignoring invalid association :line_item_adjustments on Spree::Order (model Spree::Adjustment exists, but is not included in domain)
Warning: Ignoring invalid association :shipment_adjustments on Spree::Order (model Spree::Adjustment exists, but is not included in domain)
Warning: Ignoring invalid association :inventory_units on Spree::Order (model Spree::InventoryUnit exists, but is not included in domain)
Warning: Ignoring invalid association :shipments on Spree::Order (model Spree::Shipment exists, but is not included in domain)
Warning: Ignoring invalid association :source on Spree::Order (model Spree::Chimpy::OrderSource exists, but is not included in domain)
Warning: Ignoring invalid association :shipping_method_categories on Spree::ShippingMethod (model Spree::ShippingMethodCategory exists, but is not included in domain)
Warning: Ignoring invalid association :shipping_categories on Spree::ShippingMethod (model Spree::ShippingCategory exists, but is not included in domain)
Warning: Ignoring invalid association :shipping_rates on Spree::ShippingMethod (model Spree::ShippingRate exists, but is not included in domain)
Warning: Ignoring invalid association :shipments on Spree::ShippingMethod (model Spree::Shipment exists, but is not included in domain)
Warning: Ignoring invalid association :zones on Spree::ShippingMethod (model Spree::Zone exists, but is not included in domain)
Warning: Ignoring invalid association :tax_category on Spree::ShippingMethod (model Spree::TaxCategory exists, but is not included in domain)
Warning: Ignoring invalid association :store_shipping_methods on Spree::ShippingMethod (model Spree::StoreShippingMethod exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::Store (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :store_shipping_methods on Spree::Store (model Spree::StoreShippingMethod exists, but is not included in domain)
Warning: Ignoring invalid association :sale_prices on Spree::Price (model Spree::SalePrice exists, but is not included in domain)
Warning: Ignoring invalid association :tax_category on Spree::Variant (model Spree::TaxCategory exists, but is not included in domain)
Warning: Ignoring invalid association :inventory_units on Spree::Variant (model Spree::InventoryUnit exists, but is not included in domain)
Warning: Ignoring invalid association :line_items on Spree::Variant (model Spree::LineItem exists, but is not included in domain)
Warning: Ignoring invalid association :stock_locations on Spree::Variant (model Spree::StockLocation exists, but is not included in domain)
Warning: Ignoring invalid association :stock_movements on Spree::Variant (model Spree::StockMovement exists, but is not included in domain)
Warning: Ignoring invalid association :sale_prices on Spree::Variant (model Spree::SalePrice exists, but is not included in domain)
Warning: Ignoring invalid association :stock_location on Spree::StockItem (model Spree::StockLocation exists, but is not included in domain)
Warning: Ignoring invalid association :stock_movements on Spree::StockItem (model Spree::StockMovement exists, but is not included in domain)
Warning: Ignoring invalid association :products on DeliveryDuration (uninitialized constant DeliveryDuration::Product)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :payments on Spree::PaymentMethod (model Spree::Payment exists, but is not included in domain)
Warning: Ignoring invalid association :credit_cards on Spree::PaymentMethod (model Spree::CreditCard exists, but is not included in domain)
Warning: Ignoring invalid association :store_payment_methods on Spree::PaymentMethod (model Spree::StorePaymentMethod exists, but is not included in domain)
Warning: Ignoring invalid association :adjustments on Spree::Promotion::Actions::CreateAdjustment (model Spree::Adjustment exists, but is not included in domain)
Warning: Ignoring invalid association :adjustments on Spree::Promotion::Actions::CreateItemAdjustments (model Spree::Adjustment exists, but is not included in domain)
Warning: Ignoring invalid association :promotion_action_line_items on Spree::Promotion::Actions::CreateLineItems (model Spree::PromotionActionLineItem exists, but is not included in domain)
rake aborted!
NoMethodError: undefined method `name' for nil:NilClass
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rails-erd-1.1.0/lib/rails_erd/domain/specialization.rb:66:in `<=>'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rails-erd-1.1.0/lib/rails_erd/domain/specialization.rb:13:in `sort'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rails-erd-1.1.0/lib/rails_erd/domain/specialization.rb:13:in `from_models'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rails-erd-1.1.0/lib/rails_erd/domain.rb:67:in `specializations'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rails-erd-1.1.0/lib/rails_erd/diagram.rb:170:in `filtered_specializations'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rails-erd-1.1.0/lib/rails_erd/diagram.rb:132:in `generate'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rails-erd-1.1.0/lib/rails_erd/diagram.rb:119:in `create'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rails-erd-1.1.0/lib/rails_erd/diagram.rb:74:in `create'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rails-erd-1.1.0/lib/rails_erd/tasks.rake:41:in `block (2 levels) in <top (required)>'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:240:in `call'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:240:in `block in execute'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:235:in `each'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:235:in `execute'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:172:in `invoke_with_call_chain'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:201:in `block in invoke_prerequisites'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:199:in `each'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:199:in `invoke_prerequisites'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:178:in `block in invoke_with_call_chain'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:172:in `invoke_with_call_chain'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:165:in `invoke'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:150:in `invoke_task'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:106:in `block (2 levels) in top_level'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:106:in `each'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:106:in `block in top_level'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:115:in `run_with_threads'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:100:in `top_level'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:78:in `block in run'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:176:in `standard_exception_handling'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:75:in `run'
/Users/josua/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rake-10.4.2/bin/rake:33:in `<top (required)>'
/Users/josua/.rbenv/versions/2.1.2/bin/rake:23:in `load'
/Users/josua/.rbenv/versions/2.1.2/bin/rake:23:in `<main>'
Tasks: TOP => erd => erd:generate

[kerrizor]

I myself am getting this error on a Rails 3.2 project. Investigating...

[kerrizor]

I'm actually unable to reproduce this in Spree 2.3, but I've confirmed it in a pair of complicated apps. The fix in #103 addresses the problem as I'm seeing it, although I must admit I'm not entirely sure /where/ the bug is coming from, as it seems to stem from something deeper than appears on the surface.