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Created

CanCan Uninitialized Constant Error

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ability.rb
Ruby
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module MyEngine
class Ability
 
include CanCan::Ability
 
def initialize user = User.new
if user.admin?
can :manage, :all
else
 
if user.has_role? :a_role
can :manage, [MyEngine::MyModel, MyEngine::AnotherModel]
can :dashboard, :my_engine
end
 
end
end
 
end
end
application_controller.rb
Ruby
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module MyEngine
class ApplicationController < ActionController::Base
 
before_filter :authenticate_user!
 
rescue_from CanCan::AccessDenied do |exception|
redirect_to main_app.root_url, flash: { error: exception.message }
end
 
def current_ability
MyEngine::Ability.new current_user
end
 
end
end
full stack trace
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97
activesupport (3.2.8) lib/active_support/inflector/methods.rb:230:in `block in constantize'
activesupport (3.2.8) lib/active_support/inflector/methods.rb:229:in `each'
activesupport (3.2.8) lib/active_support/inflector/methods.rb:229:in `constantize'
activesupport (3.2.8) lib/active_support/core_ext/string/inflections.rb:54:in `constantize'
cancan (1.6.8) lib/cancan/controller_resource.rb:145:in `resource_class'
cancan (1.6.8) lib/cancan/controller_resource.rb:152:in `resource_class_with_parent'
cancan (1.6.8) lib/cancan/controller_resource.rb:41:in `authorize_resource'
cancan (1.6.8) lib/cancan/controller_resource.rb:10:in `block in add_before_filter'
activesupport (3.2.8) lib/active_support/callbacks.rb:451:in `_run__2253187379616350628__process_action__382508493118337643__callbacks'
activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.8) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
activesupport (3.2.8) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.8) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.2.8) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
activesupport (3.2.8) lib/active_support/notifications.rb:123:in `block in instrument'
activesupport (3.2.8) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.8) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.2.8) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
activerecord (3.2.8) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (3.2.8) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.2.8) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.2.8) lib/action_controller/metal.rb:203:in `dispatch'
actionpack (3.2.8) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
actionpack (3.2.8) lib/action_controller/metal.rb:246:in `block in action'
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:73:in `call'
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:36:in `call'
journey (1.0.4) lib/journey/router.rb:68:in `block in call'
journey (1.0.4) lib/journey/router.rb:56:in `each'
journey (1.0.4) lib/journey/router.rb:56:in `call'
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:600:in `call'
railties (3.2.8) lib/rails/engine.rb:479:in `call'
railties (3.2.8) lib/rails/railtie/configurable.rb:30:in `method_missing'
journey (1.0.4) lib/journey/router.rb:68:in `block in call'
journey (1.0.4) lib/journey/router.rb:56:in `each'
journey (1.0.4) lib/journey/router.rb:56:in `call'
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:600:in `call'
warden (1.2.1) lib/warden/manager.rb:35:in `block in call'
warden (1.2.1) lib/warden/manager.rb:34:in `catch'
warden (1.2.1) lib/warden/manager.rb:34:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
rack (1.4.1) lib/rack/etag.rb:23:in `call'
rack (1.4.1) lib/rack/conditionalget.rb:25:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/flash.rb:242:in `call'
rack (1.4.1) lib/rack/session/abstract/id.rb:205:in `context'
rack (1.4.1) lib/rack/session/abstract/id.rb:200:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/cookies.rb:339:in `call'
activerecord (3.2.8) lib/active_record/query_cache.rb:64:in `call'
activerecord (3.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `_run__1034907501487771995__call__1209918659595050547__callbacks'
activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.8) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
activesupport (3.2.8) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.8) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/reloader.rb:65:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.8) lib/rails/rack/logger.rb:26:in `call_app'
railties (3.2.8) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.1) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.1) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.8) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.1) lib/rack/lock.rb:15:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/static.rb:62:in `call'
railties (3.2.8) lib/rails/engine.rb:479:in `call'
railties (3.2.8) lib/rails/application.rb:223:in `call'
railties (3.2.8) lib/rails/railtie/configurable.rb:30:in `method_missing'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/rack/request_handler.rb:96:in `process_request'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/abstract_request_handler.rb:516:in `accept_and_process_next_request'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/abstract_request_handler.rb:274:in `main_loop'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/rack/application_spawner.rb:206:in `start_request_handler'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/rack/application_spawner.rb:171:in `block in handle_spawn_application'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/utils.rb:470:in `safe_fork'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/rack/application_spawner.rb:166:in `handle_spawn_application'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/abstract_server.rb:180:in `start'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/rack/application_spawner.rb:129:in `start'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/spawn_manager.rb:253:in `block (2 levels) in spawn_rack_application'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/spawn_manager.rb:246:in `block in spawn_rack_application'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/abstract_server_collection.rb:82:in `block in synchronize'
<internal:prelude>:10:in `synchronize'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/spawn_manager.rb:244:in `spawn_rack_application'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/spawn_manager.rb:137:in `spawn_application'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
/Users/bm5k/.passenger/standalone/3.0.17-x86_64-ruby1.9.3-macosx-10.8/support/helper-scripts/passenger-spawn-server:99:in `<main>'
my_model.rb
Ruby
1 2 3 4 5 6
module MyEngine
 
class MyModel < ActiveRecord::Base
end
 
end
my_models_controller.rb
Ruby
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
require_dependency 'my_engine/application_controller'
 
module MyEngine
class MyModelsController < ApplicationController
 
respond_to :html, :json
 
authorize_resource
 
def index
@my_models = MyModel.all
end
 
def show
@my_model = MyModel.find params[:id]
end
 
def update
@my_model = MyModel.find params[:id]
@my_model.update_attributes params[:my_model]
 
respond_with @my_model
end
 
end
end

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