TypeError in UsersController#index

wrong argument type Hash (expected Data)

Rails.root: /home/lius/ror3

Application Trace | Framework Trace | Full Trace
app/controllers/users_controller.rb:14:in `to_json'
app/controllers/users_controller.rb:14:in `block (2 levels) in index'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/metal/mime_responds.rb:189:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/metal/mime_responds.rb:189:in `respond_to'
app/controllers/users_controller.rb:11:in `index'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/base.rb:44:in `send'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/base.rb:44:in `send_action'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/abstract_controller/base.rb:145:in `process_action'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/abstract_controller/callbacks.rb:18:in `block in process_action'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activesupport-3.0.0.beta/lib/active_support/callbacks.rb:433:in `_run__704464828__process_action__583962684__callbacks'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activesupport-3.0.0.beta/lib/active_support/callbacks.rb:423:in `_run_process_action_callbacks'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activesupport-3.0.0.beta/lib/active_support/callbacks.rb:88:in `run_callbacks'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/abstract_controller/callbacks.rb:17:in `process_action'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/metal/rendering.rb:12:in `process_action'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/metal/compatibility.rb:66:in `process_action'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/metal/instrumentation.rb:29:in `block in process_action'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activesupport-3.0.0.beta/lib/active_support/notifications/instrumenter.rb:18:in `instrument'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activesupport-3.0.0.beta/lib/active_support/notifications.rb:49:in `instrument'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/metal/instrumentation.rb:28:in `process_action'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/metal/rescue.rb:8:in `process_action'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/abstract_controller/base.rb:115:in `process'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/metal.rb:64:in `dispatch'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/metal/rack_delegation.rb:19:in `dispatch'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_controller/metal.rb:89:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_dispatch/routing/route_set.rb:27:in `call'
rack-mount (0.4.0) lib/rack/mount/recognition/route_set.rb:70:in `block in call'
rack-mount (0.4.0) lib/rack/mount/recognition/code_generation.rb:91:in `block in recognize'
rack-mount (0.4.0) lib/rack/mount/recognition/code_generation.rb:67:in `optimized_each'
rack-mount (0.4.0) lib/rack/mount/recognition/code_generation.rb:90:in `recognize'
rack-mount (0.4.0) lib/rack/mount/recognition/route_set.rb:65:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_dispatch/routing/route_set.rb:419:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-3.0.0.beta/lib/active_record/query_cache.rb:29:in `block in call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-3.0.0.beta/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-3.0.0.beta/lib/active_record/query_cache.rb:9:in `cache'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-3.0.0.beta/lib/active_record/query_cache.rb:28:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-3.0.0.beta/lib/active_record/connection_adapters/abstract/connection_pool.rb:365:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_dispatch/middleware/head.rb:14:in `call'
rack (1.1.0) lib/rack/methodoverride.rb:24:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_dispatch/middleware/params_parser.rb:20:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_dispatch/middleware/flash.rb:167:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_dispatch/middleware/session/cookie_store.rb:107:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_dispatch/middleware/cookies.rb:205:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_dispatch/middleware/callbacks.rb:46:in `block in call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activesupport-3.0.0.beta/lib/active_support/callbacks.rb:429:in `_run_call_callbacks'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/activesupport-3.0.0.beta/lib/active_support/callbacks.rb:88:in `run_callbacks'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_dispatch/middleware/callbacks.rb:44:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_dispatch/middleware/show_exceptions.rb:62:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/railties-3.0.0.beta/lib/rails/rack/logger.rb:13:in `call'
rack (1.1.0) lib/rack/runtime.rb:17:in `call'
rack (1.1.0) lib/rack/lock.rb:11:in `block in call'
<internal:prelude>:8:in `synchronize'
rack (1.1.0) lib/rack/lock.rb:11:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-3.0.0.beta/lib/action_dispatch/middleware/static.rb:30:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/railties-3.0.0.beta/lib/rails/application.rb:95:in `call'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/railties-3.0.0.beta/lib/rails/application.rb:41:in `method_missing'
/home/lius/.rvm/gems/ruby-1.9.1-p378/gems/railties-3.0.0.beta/lib/rails/rack/log_tailer.rb:15:in `call'
rack (1.1.0) lib/rack/content_length.rb:13:in `call'
rack (1.1.0) lib/rack/handler/webrick.rb:48:in `service'
/home/lius/.rvm/rubies/ruby-1.9.1-p378/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'
/home/lius/.rvm/rubies/ruby-1.9.1-p378/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'
/home/lius/.rvm/rubies/ruby-1.9.1-p378/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'

Request

Parameters:

{"format"=>"json"}

Show session dump

Show env dump

Response

Headers:

None