"undefined method `route_instance_path' for nil:NilClass" when creating a comment

[sarahhodne]

Hi,

When I create an admin comment, I get the following error:

undefined method `route_instance_path' for nil:NilClass

I'm using ActiveAdmin 0.3.3 and Rails 3.1.1. The full trace is available here. This may be related to issue #528.

[spacecowb0y]

I have the same problem.

[robinator]

I have the same problem.

[mikeotoole]

Just ran into this too.

[michaeltaras]

I'm hitting this same issue with rails 3.1.1 and the latest activeadmin from github. I threw a debugger into the offending code in lib/active_admin/comments.rb and noticed something a bit strange here (line 46):

resource_config = active_admin_config.namespace.resource_for(comment.resource.class)

Trying to just inspect active_admin_config.namespace hangs forever. And obviously the resource_for call just returns nil. If I get some more time I'll investigate further.

[kostia]

Same issue :-(

[julitrows]

Same here.

Ruby 1.9.2, Rails 3.1.1, ActiveAdmin 0.3.3

[skull-squadron]

+1 :: 1.9.2p290, 3.1.1, 0.3.4

NoMethodError in Admin::CommentsController#show

undefined method `route_instance_path' for nil:NilClass

activesupport (3.1.1) lib/active_support/whiny_nil.rb:48:in `method_missing'
activeadmin (0.3.4) lib/active_admin/comments.rb:47:in `block (3 levels) in <top (required)>'
activesupport (3.1.1) lib/active_support/callbacks.rb:457:in `_run__4295348987191613425__process_action__2206591857616638567__callbacks'
activesupport (3.1.1) lib/active_support/callbacks.rb:386:in `_run_process_action_callbacks'
activesupport (3.1.1) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.1.1) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.1.1) lib/action_controller/metal/rescue.rb:17:in `process_action'
actionpack (3.1.1) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
activesupport (3.1.1) lib/active_support/notifications.rb:53:in `block in instrument'
activesupport (3.1.1) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
activesupport (3.1.1) lib/active_support/notifications.rb:53:in `instrument'
actionpack (3.1.1) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.1.1) lib/action_controller/metal/params_wrapper.rb:201:in `process_action'
activerecord (3.1.1) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (3.1.1) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.1.1) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.1.1) lib/action_controller/metal.rb:193:in `dispatch'
actionpack (3.1.1) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
actionpack (3.1.1) lib/action_controller/metal.rb:236:in `block in action'
actionpack (3.1.1) lib/action_dispatch/routing/route_set.rb:65:in `call'
actionpack (3.1.1) lib/action_dispatch/routing/route_set.rb:65:in `dispatch'
actionpack (3.1.1) lib/action_dispatch/routing/route_set.rb:29:in `call'
rack-mount (0.8.3) lib/rack/mount/route_set.rb:152:in `block in call'
rack-mount (0.8.3) lib/rack/mount/code_generation.rb:96:in `block in recognize'
rack-mount (0.8.3) lib/rack/mount/code_generation.rb:103:in `optimized_each'
rack-mount (0.8.3) lib/rack/mount/code_generation.rb:95:in `recognize'
rack-mount (0.8.3) lib/rack/mount/route_set.rb:141:in `call'
actionpack (3.1.1) lib/action_dispatch/routing/route_set.rb:532:in `call'
sass (3.1.10) lib/sass/plugin/rack.rb:54:in `call'
warden (1.1.0) lib/warden/manager.rb:35:in `block in call'
warden (1.1.0) lib/warden/manager.rb:34:in `catch'
warden (1.1.0) lib/warden/manager.rb:34:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
rack (1.3.5) lib/rack/etag.rb:23:in `call'
rack (1.3.5) lib/rack/conditionalget.rb:25:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/flash.rb:243:in `call'
rack (1.3.5) lib/rack/session/abstract/id.rb:195:in `context'
rack (1.3.5) lib/rack/session/abstract/id.rb:190:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/cookies.rb:331:in `call'
activerecord (3.1.1) lib/active_record/query_cache.rb:62:in `call'
activerecord (3.1.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:477:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (3.1.1) lib/active_support/callbacks.rb:392:in `_run_call_callbacks'
activesupport (3.1.1) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.1.1) lib/action_dispatch/middleware/callbacks.rb:28:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/reloader.rb:68:in `call'
rack (1.3.5) lib/rack/sendfile.rb:101:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/remote_ip.rb:48:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call'
railties (3.1.1) lib/rails/rack/logger.rb:13:in `call'
rack (1.3.5) lib/rack/methodoverride.rb:24:in `call'
rack (1.3.5) lib/rack/runtime.rb:17:in `call'
activesupport (3.1.1) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.3.5) lib/rack/lock.rb:15:in `call'
actionpack (3.1.1) lib/action_dispatch/middleware/static.rb:53:in `call'
railties (3.1.1) lib/rails/engine.rb:456:in `call'
railties (3.1.1) lib/rails/rack/content_length.rb:16:in `call'
railties (3.1.1) lib/rails/rack/log_tailer.rb:14:in `call'
rack (1.3.5) lib/rack/handler/webrick.rb:59:in `service'

[simonc]

I inspected the code and it seems that the problem is located in lib/active_admin/namespace.rb
When processing the following line :

actual = resources.values.find{|config| config.resource == klass }

Even when config.resource and klass have the same name, their object_id are different.
Is there a duplication somewhere ?
Maybe a workaround could be to compare on string versions of the class names or something like that.

What do you think ?

[skull-squadron]

@simonc It might be hacky, but pry it and/or debug print both values and class types?

[spacecowb0y]

Ok, this is a quick fix: https://gist.github.com/1369085 of course this isn't the solution but it works. Please don't judge me!

[spacecowb0y]

I think this issue has been fixed with this commit :)

[gregbell]

This should be fixed now. I'm going to close it, but please reopen if the issue persists. (Fix is on master)

[spacecowb0y]

@gregbell you rock!

[gregbell]

Related to #794

[Papipo]

I am having this issue, I just installed activeadmin from master in an existing rails 3.1.3 application.

[spacecowb0y]

I'm still having the same problem on nested resources.

[dvliman]

Still having the same problem, using activeadmin (0.3.4) and rails 3.1.3. It shows NoMethodError page but it was able to post the comment if you hit back button on the browser

activesupport (3.1.3) lib/active_support/whiny_nil.rb:48:in method_missing' activeadmin (0.3.4) lib/active_admin/comments.rb:47:inblock (3 levels) in <top (required)>'
activesupport (3.1.3) lib/active_support/callbacks.rb:457:in _run__4191934539891253243__process_action__3760801307854670151__callbacks' activesupport (3.1.3) lib/active_support/callbacks.rb:386:in_run_process_action_callbacks'
activesupport (3.1.3) lib/active_support/callbacks.rb:81:in run_callbacks' actionpack (3.1.3) lib/abstract_controller/callbacks.rb:17:inprocess_action'
actionpack (3.1.3) lib/action_controller/metal/rescue.rb:17:in process_action' actionpack (3.1.3) lib/action_controller/metal/instrumentation.rb:30:inblock in process_action'
activesupport (3.1.3) lib/active_support/notifications.rb:53:in block in instrument' activesupport (3.1.3) lib/active_support/notifications/instrumenter.rb:21:ininstrument'
activesupport (3.1.3) lib/active_support/notifications.rb:53:in instrument' actionpack (3.1.3) lib/action_controller/metal/instrumentation.rb:29:inprocess_action'
actionpack (3.1.3) lib/action_controller/metal/params_wrapper.rb:201:in process_action' activerecord (3.1.3) lib/active_record/railties/controller_runtime.rb:18:inprocess_action'
actionpack (3.1.3) lib/abstract_controller/base.rb:121:in process' actionpack (3.1.3) lib/abstract_controller/rendering.rb:45:inprocess'
actionpack (3.1.3) lib/action_controller/metal.rb:193:in dispatch' actionpack (3.1.3) lib/action_controller/metal/rack_delegation.rb:14:indispatch'
actionpack (3.1.3) lib/action_controller/metal.rb:236:in block in action' actionpack (3.1.3) lib/action_dispatch/routing/route_set.rb:65:incall'
actionpack (3.1.3) lib/action_dispatch/routing/route_set.rb:65:in dispatch' actionpack (3.1.3) lib/action_dispatch/routing/route_set.rb:29:incall'
rack-mount (0.8.3) lib/rack/mount/route_set.rb:152:in block in call' rack-mount (0.8.3) lib/rack/mount/code_generation.rb:96:inblock in recognize'
rack-mount (0.8.3) lib/rack/mount/code_generation.rb:103:in optimized_each' rack-mount (0.8.3) lib/rack/mount/code_generation.rb:95:inrecognize'
rack-mount (0.8.3) lib/rack/mount/route_set.rb:141:in call' actionpack (3.1.3) lib/action_dispatch/routing/route_set.rb:532:incall'
sass (3.1.11) lib/sass/plugin/rack.rb:54:in call' warden (1.1.0) lib/warden/manager.rb:35:inblock in call'
warden (1.1.0) lib/warden/manager.rb:34:in catch' warden (1.1.0) lib/warden/manager.rb:34:incall'
actionpack (3.1.3) lib/action_dispatch/middleware/best_standards_support.rb:17:in call' rack (1.3.5) lib/rack/etag.rb:23:incall'
rack (1.3.5) lib/rack/conditionalget.rb:25:in call' actionpack (3.1.3) lib/action_dispatch/middleware/head.rb:14:incall'
actionpack (3.1.3) lib/action_dispatch/middleware/params_parser.rb:21:in call' actionpack (3.1.3) lib/action_dispatch/middleware/flash.rb:247:incall'
rack (1.3.5) lib/rack/session/abstract/id.rb:195:in context' rack (1.3.5) lib/rack/session/abstract/id.rb:190:incall'
actionpack (3.1.3) lib/action_dispatch/middleware/cookies.rb:331:in call' activerecord (3.1.3) lib/active_record/query_cache.rb:64:incall'
activerecord (3.1.3) lib/active_record/connection_adapters/abstract/connection_pool.rb:477:in call' actionpack (3.1.3) lib/action_dispatch/middleware/callbacks.rb:29:inblock in call'
activesupport (3.1.3) lib/active_support/callbacks.rb:392:in _run_call_callbacks' activesupport (3.1.3) lib/active_support/callbacks.rb:81:inrun_callbacks'
actionpack (3.1.3) lib/action_dispatch/middleware/callbacks.rb:28:in call' actionpack (3.1.3) lib/action_dispatch/middleware/reloader.rb:68:incall'
rack (1.3.5) lib/rack/sendfile.rb:101:in call' actionpack (3.1.3) lib/action_dispatch/middleware/remote_ip.rb:48:incall'
actionpack (3.1.3) lib/action_dispatch/middleware/show_exceptions.rb:47:in call' railties (3.1.3) lib/rails/rack/logger.rb:13:incall'
rack (1.3.5) lib/rack/methodoverride.rb:24:in call' rack (1.3.5) lib/rack/runtime.rb:17:incall'
activesupport (3.1.3) lib/active_support/cache/strategy/local_cache.rb:72:in call' rack (1.3.5) lib/rack/lock.rb:15:incall'
actionpack (3.1.3) lib/action_dispatch/middleware/static.rb:53:in call' railties (3.1.3) lib/rails/engine.rb:456:incall'
rack (1.3.5) lib/rack/content_length.rb:14:in call' railties (3.1.3) lib/rails/rack/log_tailer.rb:14:incall'
rack (1.3.5) lib/rack/handler/webrick.rb:59:in service' /Users/dv/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/httpserver.rb:111:inservice'
/Users/dv/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/httpserver.rb:70:in run' /Users/dv/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/server.rb:183:inblock in start_thread'

[jfedick]

I'm having the same problem as @dvliman

[waseem]

I'm getting this issue on 0.3.4. Perhaps this should be merged in 0.3.x stable branch and made a point release.

[romeo4934]

In my controller spec I have this error I don t know if it is related ..

Admin::EmployeesController POST create with invalid params re-renders the 'new' template
Failure/Error: post :create, :employee => {}
NoMethodError:
undefined method `employees_url' for #Admin::EmployeesController:0x007f87810c5c00

[wejrowski]

Solved this by updating activeadmin. I had activeadmin (0.3.4). Updated my gemfile to use gem 'activeadmin', "~> 0.4.1"

When did "gem install activeadmin" by itself, it installs 0.4.1, but when I add just 'activeadmin' to my gemfile it uses 0.3.4.. not sure why I have to specify.