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Jason FB

2011-May-21 18:24 UTC

request.format = :mobile causes error "undefined method `ref'' for nil:NilClass"

I have a strange problem with setting request.format = :mobile

I can reproduce this problem on a completely fresh Rails 3.0.7 app
with no special gems. This seemed to work well in Rails 2 but for some
reason is hiccuping here, not sure what''s different in Rails 3 that
makes this hiccup. If you look at the stack track, it doesn''t even
pass through my app stack once -- weird -- maybe this is a problem
with Passenger? Anyone see anything i''m doing wrong here? Your tips
are much appreciated, this is baffling me.

Step-by-step instructions to reproduce:

Totally fresh rails app (rails new test_mobile), then go delete public/
index.html

routes.rb __________________________________

TestMobile::Application.routes.draw do
  root :to => "application#welcome"
end

application_controller.rb __________________________

class ApplicationController < ActionController::Base
  protect_from_forgery

  def welcome
    render "welcome/index"
  end

  before_filter :check_mobile

  def check_mobile
    request.format = :mobile if request.env["HTTP_USER_AGENT"] =~ /
iPhone/
  end
end



views/welcome/index.html.erb ______________________________________

this is my regular site




views/welcome/index.mobile.erb ____________________________________

this is my mobile site




That''s it -- those are all the steps one needs to take to reproduce
this, no gem configuration necessary.

Set it up with Passenger (as test-mobile.local), go to Safrai, load
test-mobile.local, you get "this is my regular site". Then switch
Develop > User Agent to "Safari iOS 4.1", reload the page, and bam:


NoMethodError in ApplicationsController#welcome

undefined method `ref'' for nil:NilClass
Rails.root: /Users/jason/Projects/DEVELOPMENT/ROR/test_mobile

Application Trace | Framework Trace | Full Trace
activesupport (3.0.7) lib/active_support/whiny_nil.rb:48:in
`method_missing''
actionpack (3.0.7) lib/action_controller/metal/rendering.rb:10:in
`process_action''
actionpack (3.0.7) lib/action_controller/metal/rendering.rb:10:in
`map''
actionpack (3.0.7) lib/action_controller/metal/rendering.rb:10:in
`process_action''
actionpack (3.0.7) lib/abstract_controller/callbacks.rb:18:in
`process_action''
activesupport (3.0.7) lib/active_support/callbacks.rb:441:in
`_run__2115867319__process_action__733682996__callbacks''
activesupport (3.0.7) lib/active_support/callbacks.rb:410:in `send''
activesupport (3.0.7) lib/active_support/callbacks.rb:410:in
`_run_process_action_callbacks''
activesupport (3.0.7) lib/active_support/callbacks.rb:94:in `send''
activesupport (3.0.7) lib/active_support/callbacks.rb:94:in
`run_callbacks''
actionpack (3.0.7) lib/abstract_controller/callbacks.rb:17:in
`process_action''
actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb:
30:in `process_action''
activesupport (3.0.7) lib/active_support/notifications.rb:52:in
`instrument''
activesupport (3.0.7) lib/active_support/notifications/instrumenter.rb:
21:in `instrument''
activesupport (3.0.7) lib/active_support/notifications.rb:52:in
`instrument''
actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb:
29:in `process_action''
actionpack (3.0.7) lib/action_controller/metal/rescue.rb:17:in
`process_action''
actionpack (3.0.7) lib/abstract_controller/base.rb:119:in `process''
actionpack (3.0.7) lib/abstract_controller/rendering.rb:41:in
`process''
actionpack (3.0.7) lib/action_controller/metal.rb:138:in `dispatch''
actionpack (3.0.7) lib/action_controller/metal/rack_delegation.rb:
14:in `dispatch''
actionpack (3.0.7) lib/action_controller/metal.rb:178
actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:62:in
`call''
actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:62:in
`dispatch''
actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:27:in
`call''
rack-mount (0.6.14) lib/rack/mount/route_set.rb:148:in `call''
rack-mount (0.6.14) lib/rack/mount/code_generation.rb:93:in
`recognize''
rack-mount (0.6.14) lib/rack/mount/code_generation.rb:68:in
`optimized_each''
rack-mount (0.6.14) lib/rack/mount/code_generation.rb:92:in
`recognize''
rack-mount (0.6.14) lib/rack/mount/route_set.rb:139:in `call''
actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:493:in
`call''
actionpack (3.0.7) lib/action_dispatch/middleware/
best_standards_support.rb:17:in `call''
actionpack (3.0.7) lib/action_dispatch/middleware/head.rb:14:in `call''
rack (1.2.2) lib/rack/methodoverride.rb:24:in `call''
actionpack (3.0.7) lib/action_dispatch/middleware/params_parser.rb:
21:in `call''
actionpack (3.0.7) lib/action_dispatch/middleware/flash.rb:182:in
`call''
actionpack (3.0.7) lib/action_dispatch/middleware/session/
abstract_store.rb:149:in `call''
actionpack (3.0.7) lib/action_dispatch/middleware/cookies.rb:302:in
`call''
activerecord (3.0.7) lib/active_record/query_cache.rb:32:in `call''
activerecord (3.0.7) lib/active_record/connection_adapters/abstract/
query_cache.rb:28:in `cache''
activerecord (3.0.7) lib/active_record/query_cache.rb:12:in `cache''
activerecord (3.0.7) lib/active_record/query_cache.rb:31:in `call''
activerecord (3.0.7) lib/active_record/connection_adapters/abstract/
connection_pool.rb:354:in `call''
actionpack (3.0.7) lib/action_dispatch/middleware/callbacks.rb:46:in
`call''
activesupport (3.0.7) lib/active_support/callbacks.rb:416:in
`_run_call_callbacks''
actionpack (3.0.7) lib/action_dispatch/middleware/callbacks.rb:44:in
`call''
rack (1.2.2) lib/rack/sendfile.rb:107:in `call''
actionpack (3.0.7) lib/action_dispatch/middleware/remote_ip.rb:48:in
`call''
actionpack (3.0.7) lib/action_dispatch/middleware/show_exceptions.rb:
47:in `call''
railties (3.0.7) lib/rails/rack/logger.rb:13:in `call''
rack (1.2.2) lib/rack/runtime.rb:17:in `call''
activesupport (3.0.7) lib/active_support/cache/strategy/local_cache.rb:
72:in `call''
rack (1.2.2) lib/rack/lock.rb:11:in `call''
rack (1.2.2) lib/rack/lock.rb:11:in `synchronize''
rack (1.2.2) lib/rack/lock.rb:11:in `call''
actionpack (3.0.7) lib/action_dispatch/middleware/static.rb:30:in
`call''
railties (3.0.7) lib/rails/application.rb:168:in `call''
railties (3.0.7) lib/rails/application.rb:77:in `send''
railties (3.0.7) lib/rails/application.rb:77:in `method_missing''
passenger (2.2.10) lib/phusion_passenger/rack/request_handler.rb:92:in
`process_request''
passenger (2.2.10) lib/phusion_passenger/abstract_request_handler.rb:
207:in `main_loop''
passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb:
118:in `run''
passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb:
65:in `spawn_application''
passenger (2.2.10) lib/phusion_passenger/utils.rb:184:in `safe_fork''
passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb:
58:in `spawn_application''
passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb:
41:in `spawn_application''
passenger (2.2.10) lib/phusion_passenger/spawn_manager.rb:159:in
`spawn_application''
passenger (2.2.10) lib/phusion_passenger/spawn_manager.rb:287:in
`handle_spawn_application''
passenger (2.2.10) lib/phusion_passenger/abstract_server.rb:352:in
`__send__''
passenger (2.2.10) lib/phusion_passenger/abstract_server.rb:352:in
`main_loop''
passenger (2.2.10) lib/phusion_passenger/abstract_server.rb:196:in
`start_synchronously''
passenger (2.2.10) bin/passenger-spawn-server:61
Request

Parameters:

{"format"=>"mobile"}
Show session dump

Show env dump

Response

Headers:

None



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Kendall Gifford

2011-May-23 18:51 UTC

head link

Re: request.format = :mobile causes error "undefined method `ref'' for nil:NilClass"

On Saturday, May 21, 2011 12:24:27 PM UTC-6, Jason FB
wrote:>
> I have a strange problem with setting request.format = :mobile 
>
> I can reproduce this problem on a completely fresh Rails 3.0.7 app 
> with no special gems. This seemed to work well in Rails 2 but for some 
> reason is hiccuping here, not sure what''s different in Rails 3
that
> makes this hiccup. If you look at the stack track, it doesn''t even
> pass through my app stack once -- weird -- maybe this is a problem 
> with Passenger? Anyone see anything i''m doing wrong here? Your
tips
> are much appreciated, this is baffling me. 
>
> Step-by-step instructions to reproduce: 
>
> Totally fresh rails app (rails new test_mobile), then go delete public/ 
> index.html 
>
> routes.rb __________________________________ 
>
> TestMobile::Application.routes.draw do 
>   root :to => "application#welcome" 
> end 
>
> application_controller.rb __________________________ 
>
> class ApplicationController < ActionController::Base 
>   protect_from_forgery 
>
>   def welcome 
>     render "welcome/index" 
>   end 
>
>   before_filter :check_mobile 
>
>   def check_mobile 
>     request.format = :mobile if request.env["HTTP_USER_AGENT"] =~
/
> iPhone/ 
>   end 
> end 
>
>
>
> views/welcome/index.html.erb ______________________________________ 
>
> this is my regular site 
>
>
>
>
> views/welcome/index.mobile.erb ____________________________________ 
>
> this is my mobile site 
>
>
>
>
> That''s it -- those are all the steps one needs to take to
reproduce
> this, no gem configuration necessary. 
>
> Set it up with Passenger (as test-mobile.local), go to Safrai, load 
> test-mobile.local, you get "this is my regular site". Then switch
> Develop > User Agent to "Safari iOS 4.1", reload the page, and
bam:
>
>
> NoMethodError in ApplicationsController#welcome 
>
Hmm, are you sure that your routes.rb file contains the singular form 
"application#welcome" and not "applications#welcome" (note
the "s" on
"applications"). What does "rake routes" return?

It looks to me like your :root route is mapping to
"applications#welcome"
(plural) as if you''ve got: root :to =>
"applications#welcome"

The only way to know if it is the routing is to have a rake routes dump.
 
>
> undefined method `ref'' for nil:NilClass 
> Rails.root: /Users/jason/Projects/DEVELOPMENT/ROR/test_mobile 
>
> Application Trace | Framework Trace | Full Trace 
> activesupport (3.0.7) lib/active_support/whiny_nil.rb:48:in 
> `method_missing'' 
> actionpack (3.0.7) lib/action_controller/metal/rendering.rb:10:in 
> `process_action'' 
> actionpack (3.0.7) lib/action_controller/metal/rendering.rb:10:in 
> `map'' 
> actionpack (3.0.7) lib/action_controller/metal/rendering.rb:10:in 
> `process_action'' 
> actionpack (3.0.7) lib/abstract_controller/callbacks.rb:18:in 
> `process_action'' 
> activesupport (3.0.7) lib/active_support/callbacks.rb:441:in 
> `_run__2115867319__process_action__733682996__callbacks'' 
> activesupport (3.0.7) lib/active_support/callbacks.rb:410:in
`send''
> activesupport (3.0.7) lib/active_support/callbacks.rb:410:in 
> `_run_process_action_callbacks'' 
> activesupport (3.0.7) lib/active_support/callbacks.rb:94:in `send''
> activesupport (3.0.7) lib/active_support/callbacks.rb:94:in 
> `run_callbacks'' 
> actionpack (3.0.7) lib/abstract_controller/callbacks.rb:17:in 
> `process_action'' 
> actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb: 
> 30:in `process_action'' 
> activesupport (3.0.7) lib/active_support/notifications.rb:52:in 
> `instrument'' 
> activesupport (3.0.7) lib/active_support/notifications/instrumenter.rb: 
> 21:in `instrument'' 
> activesupport (3.0.7) lib/active_support/notifications.rb:52:in 
> `instrument'' 
> actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb: 
> 29:in `process_action'' 
> actionpack (3.0.7) lib/action_controller/metal/rescue.rb:17:in 
> `process_action'' 
> actionpack (3.0.7) lib/abstract_controller/base.rb:119:in
`process''
> actionpack (3.0.7) lib/abstract_controller/rendering.rb:41:in 
> `process'' 
> actionpack (3.0.7) lib/action_controller/metal.rb:138:in
`dispatch''
> actionpack (3.0.7) lib/action_controller/metal/rack_delegation.rb: 
> 14:in `dispatch'' 
> actionpack (3.0.7) lib/action_controller/metal.rb:178 
> actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:62:in 
> `call'' 
> actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:62:in 
> `dispatch'' 
> actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:27:in 
> `call'' 
> rack-mount (0.6.14) lib/rack/mount/route_set.rb:148:in `call'' 
> rack-mount (0.6.14) lib/rack/mount/code_generation.rb:93:in 
> `recognize'' 
> rack-mount (0.6.14) lib/rack/mount/code_generation.rb:68:in 
> `optimized_each'' 
> rack-mount (0.6.14) lib/rack/mount/code_generation.rb:92:in 
> `recognize'' 
> rack-mount (0.6.14) lib/rack/mount/route_set.rb:139:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:493:in 
> `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/ 
> best_standards_support.rb:17:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/head.rb:14:in
`call''
> rack (1.2.2) lib/rack/methodoverride.rb:24:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/params_parser.rb: 
> 21:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/flash.rb:182:in 
> `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/session/ 
> abstract_store.rb:149:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/cookies.rb:302:in 
> `call'' 
> activerecord (3.0.7) lib/active_record/query_cache.rb:32:in `call''
> activerecord (3.0.7) lib/active_record/connection_adapters/abstract/ 
> query_cache.rb:28:in `cache'' 
> activerecord (3.0.7) lib/active_record/query_cache.rb:12:in
`cache''
> activerecord (3.0.7) lib/active_record/query_cache.rb:31:in `call''
> activerecord (3.0.7) lib/active_record/connection_adapters/abstract/ 
> connection_pool.rb:354:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/callbacks.rb:46:in 
> `call'' 
> activesupport (3.0.7) lib/active_support/callbacks.rb:416:in 
> `_run_call_callbacks'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/callbacks.rb:44:in 
> `call'' 
> rack (1.2.2) lib/rack/sendfile.rb:107:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/remote_ip.rb:48:in 
> `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/show_exceptions.rb: 
> 47:in `call'' 
> railties (3.0.7) lib/rails/rack/logger.rb:13:in `call'' 
> rack (1.2.2) lib/rack/runtime.rb:17:in `call'' 
> activesupport (3.0.7) lib/active_support/cache/strategy/local_cache.rb: 
> 72:in `call'' 
> rack (1.2.2) lib/rack/lock.rb:11:in `call'' 
> rack (1.2.2) lib/rack/lock.rb:11:in `synchronize'' 
> rack (1.2.2) lib/rack/lock.rb:11:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/static.rb:30:in 
> `call'' 
> railties (3.0.7) lib/rails/application.rb:168:in `call'' 
> railties (3.0.7) lib/rails/application.rb:77:in `send'' 
> railties (3.0.7) lib/rails/application.rb:77:in `method_missing'' 
> passenger (2.2.10) lib/phusion_passenger/rack/request_handler.rb:92:in 
> `process_request'' 
> passenger (2.2.10) lib/phusion_passenger/abstract_request_handler.rb: 
> 207:in `main_loop'' 
> passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb: 
> 118:in `run'' 
> passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb: 
> 65:in `spawn_application'' 
> passenger (2.2.10) lib/phusion_passenger/utils.rb:184:in
`safe_fork''
> passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb: 
> 58:in `spawn_application'' 
> passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb: 
> 41:in `spawn_application'' 
> passenger (2.2.10) lib/phusion_passenger/spawn_manager.rb:159:in 
> `spawn_application'' 
> passenger (2.2.10) lib/phusion_passenger/spawn_manager.rb:287:in 
> `handle_spawn_application'' 
> passenger (2.2.10) lib/phusion_passenger/abstract_server.rb:352:in 
> `__send__'' 
> passenger (2.2.10) lib/phusion_passenger/abstract_server.rb:352:in 
> `main_loop'' 
> passenger (2.2.10) lib/phusion_passenger/abstract_server.rb:196:in 
> `start_synchronously'' 
> passenger (2.2.10) bin/passenger-spawn-server:61 
> Request 
>
> Parameters: 
>
> {"format"=>"mobile"} 
> Show session dump 
>
> Show env dump 
>
> Response 
>
> Headers: 
>
> None 
>
>
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Alpha Blue

2011-May-23 20:08 UTC

head link

Re: request.format = :mobile causes error "undefined method `ref'' for nil:NilClass"

request.format = :mobile if request.user_agent =~ /Mobile|webOS|iPhone/

-- 
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Jason Fleetwood-Boldt

2011-May-23 20:18 UTC

head link

Re: Re: request.format = :mobile causes error "undefined method `ref'' for nil:NilClass"

Thanks for the feedback. No my problem was that I didn''t (/realize I
had to) set the MIME type for "mobile" in
config/initializers/mime_types.rb

Mime::Type.register_alias "text/html", :mobile

That''s what I was missing -- I''m sure of it cause it worked
fine after I set that correctly.

If the error message from Rails said "You didn''t set a MIME type
in config/initializers/mime_types.rb for the format :mobile" that would be
more helpful. It makes perfect sense-- I just didn''t realize that was a
necessary step.



On May 23, 2011, at 4:08 PM, Alpha Blue wrote:
> request.format = :mobile if request.user_agent =~ /Mobile|webOS|iPhone/


On May 23, 2011, at 2:51 PM, Kendall Gifford wrote:
> On Saturday, May 21, 2011 12:24:27 PM UTC-6, Jason FB wrote:
> I have a strange problem with setting request.format = :mobile 
> 
> I can reproduce this problem on a completely fresh Rails 3.0.7 app 
> with no special gems. This seemed to work well in Rails 2 but for some 
> reason is hiccuping here, not sure what''s different in Rails 3
that
> makes this hiccup. If you look at the stack track, it doesn''t even
> pass through my app stack once -- weird -- maybe this is a problem 
> with Passenger? Anyone see anything i''m doing wrong here? Your
tips
> are much appreciated, this is baffling me. 
> 
> Step-by-step instructions to reproduce: 
> 
> Totally fresh rails app (rails new test_mobile), then go delete public/ 
> index.html 
> 
> routes.rb __________________________________ 
> 
> TestMobile::Application.routes.draw do 
>   root :to => "application#welcome" 
> end 
> 
> application_controller.rb __________________________ 
> 
> class ApplicationController < ActionController::Base 
>   protect_from_forgery 
> 
>   def welcome 
>     render "welcome/index" 
>   end 
> 
>   before_filter :check_mobile 
> 
>   def check_mobile 
>     request.format = :mobile if request.env["HTTP_USER_AGENT"] =~
/
> iPhone/ 
>   end 
> end 
> 
> 
> 
> views/welcome/index.html.erb ______________________________________ 
> 
> this is my regular site 
> 
> 
> 
> 
> views/welcome/index.mobile.erb ____________________________________ 
> 
> this is my mobile site 
> 
> 
> 
> 
> That''s it -- those are all the steps one needs to take to
reproduce
> this, no gem configuration necessary. 
> 
> Set it up with Passenger (as test-mobile.local), go to Safrai, load 
> test-mobile.local, you get "this is my regular site". Then switch
> Develop > User Agent to "Safari iOS 4.1", reload the page, and
bam:
> 
> 
> NoMethodError in ApplicationsController#welcome 
> 
> Hmm, are you sure that your routes.rb file contains the singular form
"application#welcome" and not "applications#welcome" (note
the "s" on "applications"). What does "rake
routes" return?
> 
> It looks to me like your :root route is mapping to
"applications#welcome" (plural) as if you''ve got: root :to
=> "applications#welcome"
> 
> The only way to know if it is the routing is to have a rake routes dump.
>  
> 
> undefined method `ref'' for nil:NilClass 
> Rails.root: /Users/jason/Projects/DEVELOPMENT/ROR/test_mobile 
> 
> Application Trace | Framework Trace | Full Trace 
> activesupport (3.0.7) lib/active_support/whiny_nil.rb:48:in 
> `method_missing'' 
> actionpack (3.0.7) lib/action_controller/metal/rendering.rb:10:in 
> `process_action'' 
> actionpack (3.0.7) lib/action_controller/metal/rendering.rb:10:in 
> `map'' 
> actionpack (3.0.7) lib/action_controller/metal/rendering.rb:10:in 
> `process_action'' 
> actionpack (3.0.7) lib/abstract_controller/callbacks.rb:18:in 
> `process_action'' 
> activesupport (3.0.7) lib/active_support/callbacks.rb:441:in 
> `_run__2115867319__process_action__733682996__callbacks'' 
> activesupport (3.0.7) lib/active_support/callbacks.rb:410:in
`send''
> activesupport (3.0.7) lib/active_support/callbacks.rb:410:in 
> `_run_process_action_callbacks'' 
> activesupport (3.0.7) lib/active_support/callbacks.rb:94:in `send''
> activesupport (3.0.7) lib/active_support/callbacks.rb:94:in 
> `run_callbacks'' 
> actionpack (3.0.7) lib/abstract_controller/callbacks.rb:17:in 
> `process_action'' 
> actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb: 
> 30:in `process_action'' 
> activesupport (3.0.7) lib/active_support/notifications.rb:52:in 
> `instrument'' 
> activesupport (3.0.7) lib/active_support/notifications/instrumenter.rb: 
> 21:in `instrument'' 
> activesupport (3.0.7) lib/active_support/notifications.rb:52:in 
> `instrument'' 
> actionpack (3.0.7) lib/action_controller/metal/instrumentation.rb: 
> 29:in `process_action'' 
> actionpack (3.0.7) lib/action_controller/metal/rescue.rb:17:in 
> `process_action'' 
> actionpack (3.0.7) lib/abstract_controller/base.rb:119:in
`process''
> actionpack (3.0.7) lib/abstract_controller/rendering.rb:41:in 
> `process'' 
> actionpack (3.0.7) lib/action_controller/metal.rb:138:in
`dispatch''
> actionpack (3.0.7) lib/action_controller/metal/rack_delegation.rb: 
> 14:in `dispatch'' 
> actionpack (3.0.7) lib/action_controller/metal.rb:178 
> actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:62:in 
> `call'' 
> actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:62:in 
> `dispatch'' 
> actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:27:in 
> `call'' 
> rack-mount (0.6.14) lib/rack/mount/route_set.rb:148:in `call'' 
> rack-mount (0.6.14) lib/rack/mount/code_generation.rb:93:in 
> `recognize'' 
> rack-mount (0.6.14) lib/rack/mount/code_generation.rb:68:in 
> `optimized_each'' 
> rack-mount (0.6.14) lib/rack/mount/code_generation.rb:92:in 
> `recognize'' 
> rack-mount (0.6.14) lib/rack/mount/route_set.rb:139:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/routing/route_set.rb:493:in 
> `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/ 
> best_standards_support.rb:17:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/head.rb:14:in
`call''
> rack (1.2.2) lib/rack/methodoverride.rb:24:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/params_parser.rb: 
> 21:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/flash.rb:182:in 
> `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/session/ 
> abstract_store.rb:149:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/cookies.rb:302:in 
> `call'' 
> activerecord (3.0.7) lib/active_record/query_cache.rb:32:in `call''
> activerecord (3.0.7) lib/active_record/connection_adapters/abstract/ 
> query_cache.rb:28:in `cache'' 
> activerecord (3.0.7) lib/active_record/query_cache.rb:12:in
`cache''
> activerecord (3.0.7) lib/active_record/query_cache.rb:31:in `call''
> activerecord (3.0.7) lib/active_record/connection_adapters/abstract/ 
> connection_pool.rb:354:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/callbacks.rb:46:in 
> `call'' 
> activesupport (3.0.7) lib/active_support/callbacks.rb:416:in 
> `_run_call_callbacks'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/callbacks.rb:44:in 
> `call'' 
> rack (1.2.2) lib/rack/sendfile.rb:107:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/remote_ip.rb:48:in 
> `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/show_exceptions.rb: 
> 47:in `call'' 
> railties (3.0.7) lib/rails/rack/logger.rb:13:in `call'' 
> rack (1.2.2) lib/rack/runtime.rb:17:in `call'' 
> activesupport (3.0.7) lib/active_support/cache/strategy/local_cache.rb: 
> 72:in `call'' 
> rack (1.2.2) lib/rack/lock.rb:11:in `call'' 
> rack (1.2.2) lib/rack/lock.rb:11:in `synchronize'' 
> rack (1.2.2) lib/rack/lock.rb:11:in `call'' 
> actionpack (3.0.7) lib/action_dispatch/middleware/static.rb:30:in 
> `call'' 
> railties (3.0.7) lib/rails/application.rb:168:in `call'' 
> railties (3.0.7) lib/rails/application.rb:77:in `send'' 
> railties (3.0.7) lib/rails/application.rb:77:in `method_missing'' 
> passenger (2.2.10) lib/phusion_passenger/rack/request_handler.rb:92:in 
> `process_request'' 
> passenger (2.2.10) lib/phusion_passenger/abstract_request_handler.rb: 
> 207:in `main_loop'' 
> passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb: 
> 118:in `run'' 
> passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb: 
> 65:in `spawn_application'' 
> passenger (2.2.10) lib/phusion_passenger/utils.rb:184:in
`safe_fork''
> passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb: 
> 58:in `spawn_application'' 
> passenger (2.2.10) lib/phusion_passenger/rack/application_spawner.rb: 
> 41:in `spawn_application'' 
> passenger (2.2.10) lib/phusion_passenger/spawn_manager.rb:159:in 
> `spawn_application'' 
> passenger (2.2.10) lib/phusion_passenger/spawn_manager.rb:287:in 
> `handle_spawn_application'' 
> passenger (2.2.10) lib/phusion_passenger/abstract_server.rb:352:in 
> `__send__'' 
> passenger (2.2.10) lib/phusion_passenger/abstract_server.rb:352:in 
> `main_loop'' 
> passenger (2.2.10) lib/phusion_passenger/abstract_server.rb:196:in 
> `start_synchronously'' 
> passenger (2.2.10) bin/passenger-spawn-server:61 
> Request 
> 
> Parameters: 
> 
> {"format"=>"mobile"} 
> Show session dump 
> 
> Show env dump 
> 
> Response 
> 
> Headers: 
> 
> None 
> 
> 
> -- 
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Alpha Blue

2011-May-23 20:31 UTC

head link

Re: request.format = :mobile causes error "undefined method `ref'' for nil:NilClass"

I misread what you posted - my mistake.  You also need to set the mime 
type, as you stated.

You might also want to do the following, which will make it simpler for 
you down the road where managing your views can be a bit tedious.

In application.rb set a config for:

paths.app.views << "app/views/mobile"

Then you can just keep your mobile views separate from other views.

i.e.

\views
\views\home
\views\layouts
\views\mobile
\views\users
etc.

and in \mobile you would have

\mobile
\mobile\home\index.mobile
\mobile\layouts\application.mobile
\mobile\users\index.mobile
etc.

If you want to see some testing scenarios for mobile rails look at this:

http://www.ruby-forum.com/topic/1744072

I wrote it a few days ago.  Glad you got it working.

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