Forum: Ruby on Rails AWS XML-RPC FaultException

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6992e8171ed4afa8b4ad4a8cef31fa29?d=identicon&s=25 Enrico Teotti (Guest)
on 2007-02-14 14:44
(Received via mailing list)
Hi,
I needed to create a fault message in a XML-RPC ws. The only tip I've
found says to raise a FaultException giving the faultCode and the
faultString. But testing with the scaffold I get:
 NoMethodError in UserController#invoke_submit

You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.collect

Here's the api implementation:

class UserController < ApplicationController
  wsdl_service_name 'User'
  web_service_scaffold :invoke
  def create(email, password, first_name, last_name, phone)

    if first_name == "admin"
      raise XMLRPC::FaultException.new(3, "admin is not allowed...")
    else
      return 0
    end
  end
end

In the development log looks like the raised exeption correctly builds
the answer:
Web Service Response: => #<XMLRPC::FaultException:
XMLRPC::FaultException>
  <?xml version="1.0"
?><methodResponse><fault><value><struct><member><name>faultCode</name><value><i4>3</i4></value></member><member><name>faultString</name><value><string>admin
is not
allowed...</string></value></member></struct></value></fault></methodResponse>
Sending data

but then something happens and I have no clue.
Thanks,
Enrico

ps
this is the complete development log file:

Processing UserController#invoke_submit (for 127.0.0.1 at 2007-02-14
00:21:13) [POST]
  Session ID: bf63f47951b57e90f2b11afaedb1d08a
  Parameters: {"commit"=>"Invoke", "protocol"=>"xmlrpc",
"service"=>"user", "action"=>"invoke_submit", "method"=>"Create",
"controller"=>"user", "method_params"=>{"0"=>"a", "1"=>"a",
"2"=>"admin", "3"=>"a", "4"=>"a"}}

Web Service Request: Create(email=>"a", password=>"a",
first_name=>"admin", last_name=>"a", phone=>"a") Entrypoint:
invoke_submit
  <?xml version="1.0"
?><methodCall><methodName>Create</methodName><params><param><value><string>a</string></value></param><param><value><string>a</string></value></param><param><value><string>admin</string></value></param><param><value><string>a</string></value></param><param><value><string>a</string></value></param></params></methodCall>


XMLRPC::FaultException (admin is not allowed...):
    .//app/controllers/user_controller.rb:8:in `create'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/invocation.rb:141:in
`perform_invocation_without_interception'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/invocation.rb:135:in
`perform_invocation'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/dispatcher/abstract.rb:42:in
`web_service_filtered_invoke'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/dispatcher/abstract.rb:33:in
`web_service_direct_invoke_without_controller'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/dispatcher/action_controller_dispatcher.rb:109:in
`web_service_direct_invoke'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/dispatcher/abstract.rb:54:in
`web_service_invoke'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/dispatcher/abstract.rb:21:in
`invoke_web_service_request'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/dispatcher/action_controller_dispatcher.rb:55:in
`dispatch_web_service_request'
    /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/dispatcher/action_controller_dispatcher.rb:53:in
`dispatch_web_service_request'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/scaffolding.rb:83:in
`invoke_submit'
    /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/scaffolding.rb:67:in
`invoke_submit'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/base.rb:1095:in
`perform_action_without_filters'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:632:in
`call_filter'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:619:in
`perform_action_without_benchmark'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue'
    /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/rescue.rb:83:in
`perform_action'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/base.rb:430:in
`process_without_filters'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:624:in
`process_without_session_management_support'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/session_management.rb:114:in
`process'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/base.rb:330:in
`process'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/dispatcher.rb:41:in
`dispatch'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/webrick_server.rb:113:in
`handle_dispatch'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/webrick_server.rb:79:in
`service'
    /usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
    /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
    /usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
    /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
    /usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start'
    /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start'
    /usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start'
    /usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/webrick_server.rb:63:in
`dispatch'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/commands/servers/webrick.rb:59
    /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in
`require'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:343:in
`new_constants_in'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in
`require'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/commands/server.rb:39
    /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in
`require'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:343:in
`new_constants_in'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in
`require'
    script/server:3



Web Service Response: => #<XMLRPC::FaultException:
XMLRPC::FaultException>
  <?xml version="1.0"
?><methodResponse><fault><value><struct><member><name>faultCode</name><value><i4>3</i4></value></member><member><name>faultString</name><value><string>admin
is not
allowed...</string></value></member></struct></value></fault></methodResponse>
Sending data


NoMethodError (You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.collect):
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/rescue.rb:139:in
`clean_backtrace'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/rescue.rb:43:in
`log_error'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/deprecation.rb:43:in
`silence'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/rescue.rb:37:in
`log_error'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/rescue.rb:25:in
`rescue_action'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/scaffolding.rb:158:in
`handle_invocation_exception'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/scaffolding.rb:86:in
`invoke_submit'
    /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
    /usr/local/lib/ruby/gems/1.8/gems/actionwebservice-1.2.1/lib/action_web_service/scaffolding.rb:67:in
`invoke_submit'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/base.rb:1095:in
`perform_action_without_filters'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:632:in
`call_filter'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:619:in
`perform_action_without_benchmark'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue'
    /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/rescue.rb:83:in
`perform_action'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/base.rb:430:in
`process_without_filters'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:624:in
`process_without_session_management_support'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/session_management.rb:114:in
`process'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/base.rb:330:in
`process'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/dispatcher.rb:41:in
`dispatch'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/webrick_server.rb:113:in
`handle_dispatch'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/webrick_server.rb:79:in
`service'
    /usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
    /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
    /usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
    /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
    /usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start'
    /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start'
    /usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start'
    /usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/webrick_server.rb:63:in
`dispatch'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/commands/servers/webrick.rb:59
    /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in
`require'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:343:in
`new_constants_in'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in
`require'
    /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/commands/server.rb:39
    /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in
`require'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:343:in
`new_constants_in'
    /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in
`require'
    script/server:3


Rendering
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/templates/rescues/layout.rhtml
(500 Internal Error)

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"Complete independence does not mean arrogant isolation or a superior
disdain for all help."
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