NoMethodError in Spree::CheckoutController#paypal_confirm

gistfile1.txt

undefined method `purchase' for #<Spree::BillingIntegration::PaypalExpress:0x007fea60dbb508>

Rails.root: /Users/michaelgall/Documents/web/lifecoach
Application Trace | Framework Trace | Full Trace

activemodel (3.2.3) lib/active_model/attribute_methods.rb:407:in `method_missing'
activerecord (3.2.3) lib/active_record/attribute_methods.rb:148:in `method_missing'
/Users/michaelgall/.rbenv/versions/1.9.3-p125/lib/ruby/gems/1.9.1/bundler/gems/spree-b1ef21a33608/core/app/models/spree/payment/processing.rb:107:in `block in gateway_action'
/Users/michaelgall/.rbenv/versions/1.9.3-p125/lib/ruby/gems/1.9.1/bundler/gems/spree-b1ef21a33608/core/app/models/spree/payment/processing.rb:147:in `protect_from_connection_error'
/Users/michaelgall/.rbenv/versions/1.9.3-p125/lib/ruby/gems/1.9.1/bundler/gems/spree-b1ef21a33608/core/app/models/spree/payment/processing.rb:104:in `gateway_action'
/Users/michaelgall/.rbenv/versions/1.9.3-p125/lib/ruby/gems/1.9.1/bundler/gems/spree-b1ef21a33608/core/app/models/spree/payment/processing.rb:27:in `purchase!'
/Users/michaelgall/.rbenv/versions/1.9.3-p125/lib/ruby/gems/1.9.1/bundler/gems/spree-b1ef21a33608/core/app/models/spree/payment/processing.rb:9:in `process!'
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activerecord (3.2.3) lib/active_record/associations/collection_proxy.rb:89:in `method_missing'
app/models/spree/order.rb:376:in `process_payments!'
app/models/spree/order.rb:98:in `block (2 levels) in <class:Order>'
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state_machine (1.1.2) lib/state_machine/callback.rb:190:in `run_methods'
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state_machine (1.1.2) lib/state_machine/transition.rb:413:in `before'
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state_machine (1.1.2) lib/state_machine/transition.rb:341:in `block in pausable'
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state_machine (1.1.2) lib/state_machine/transition.rb:239:in `run_callbacks'
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state_machine (1.1.2) lib/state_machine/transition_collection.rb:211:in `run_callbacks'
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activesupport (3.2.3) lib/active_support/callbacks.rb:385:in `_run_validation_callbacks'
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activerecord (3.2.3) lib/active_record/attribute_methods/dirty.rb:22:in `save'
activerecord (3.2.3) lib/active_record/transactions.rb:241:in `block (2 levels) in save'
activerecord (3.2.3) lib/active_record/transactions.rb:295:in `block in with_transaction_returning_status'
activerecord (3.2.3) lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction'
activerecord (3.2.3) lib/active_record/transactions.rb:208:in `transaction'
activerecord (3.2.3) lib/active_record/transactions.rb:293:in `with_transaction_returning_status'
activerecord (3.2.3) lib/active_record/transactions.rb:241:in `block in save'
activerecord (3.2.3) lib/active_record/transactions.rb:252:in `rollback_active_record_state!'
activerecord (3.2.3) lib/active_record/transactions.rb:240:in `save'
state_machine (1.1.2) lib/state_machine/transition_collection.rb:153:in `block (2 levels) in run_actions'
state_machine (1.1.2) lib/state_machine/transition_collection.rb:153:in `each'
state_machine (1.1.2) lib/state_machine/transition_collection.rb:153:in `block in run_actions'
state_machine (1.1.2) lib/state_machine/transition_collection.rb:169:in `catch_exceptions'
state_machine (1.1.2) lib/state_machine/transition_collection.rb:147:in `run_actions'
state_machine (1.1.2) lib/state_machine/transition_collection.rb:60:in `perform'
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state_machine (1.1.2) lib/state_machine/event.rb:167:in `fire'
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state_machine (1.1.2) lib/state_machine/machine.rb:753:in `call'
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state_machine (1.1.2) lib/state_machine/machine.rb:753:in `call'
state_machine (1.1.2) lib/state_machine/machine.rb:753:in `block (2 levels) in define_helper'
/Users/michaelgall/Development/misc/spree_paypal_express/app/controllers/spree/checkout_controller_decorator.rb:151:in `paypal_finish'
/Users/michaelgall/Development/misc/spree_paypal_express/app/controllers/spree/checkout_controller_decorator.rb:98:in `paypal_confirm'
actionpack (3.2.3) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
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actionpack (3.2.3) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
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activesupport (3.2.3) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.3) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
activesupport (3.2.3) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.3) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.2.3) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (3.2.3) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
activesupport (3.2.3) lib/active_support/notifications.rb:123:in `block in instrument'
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activesupport (3.2.3) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.3) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.2.3) lib/action_controller/metal/params_wrapper.rb:205:in `process_action'
activerecord (3.2.3) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (3.2.3) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.2.3) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.2.3) lib/action_controller/metal.rb:203:in `dispatch'
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railties (3.2.3) lib/rails/engine.rb:479:in `call'
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