Undefined Method `per' for #<ActiveRecord::Relation:0x3fd2330>

[Gerhardk]

Environment:
Ruby 1.9.2
Rails 3.0.10
activeadmin 0.3.2
kaminari 0.12.4
meta_search 1.0.6
will_paginate 3.0.2

When trying to access the index page of a model added to activeadmin the I get the following error:

undefined method `per' for #ActiveRecord::Relation:0x3fd2330

activerecord (3.0.10) lib/active_record/relation.rb:374:in method_missing' activeadmin (0.3.2) lib/active_admin/resource_controller/collection.rb:123:inpaginate'
activeadmin (0.3.2) lib/active_admin/resource_controller/collection.rb:114:in active_admin_collection' activeadmin (0.3.2) lib/active_admin/resource_controller/collection.rb:17:incollection'
inherited_resources (1.2.2) lib/inherited_resources/actions.rb:7:in index' activeadmin (0.3.2) lib/active_admin/resource_controller/actions.rb:11:inindex'
actionpack (3.0.10) lib/action_controller/metal/implicit_render.rb:4:in send_action' actionpack (3.0.10) lib/abstract_controller/base.rb:150:inprocess_action'
actionpack (3.0.10) lib/action_controller/metal/rendering.rb:11:in process_action' actionpack (3.0.10) lib/abstract_controller/callbacks.rb:18:inblock in process_action'
activesupport (3.0.10) lib/active_support/callbacks.rb:461:in _run__253224298__process_action__730883725__callbacks' activesupport (3.0.10) lib/active_support/callbacks.rb:410:in_run_process_action_callbacks'
activesupport (3.0.10) lib/active_support/callbacks.rb:94:in run_callbacks' actionpack (3.0.10) lib/abstract_controller/callbacks.rb:17:inprocess_action'
actionpack (3.0.10) lib/action_controller/metal/rescue.rb:17:in process_action' actionpack (3.0.10) lib/action_controller/metal/instrumentation.rb:30:inblock in process_action'
activesupport (3.0.10) lib/active_support/notifications.rb:52:in block in instrument' activesupport (3.0.10) lib/active_support/notifications/instrumenter.rb:21:ininstrument'
activesupport (3.0.10) lib/active_support/notifications.rb:52:in instrument' actionpack (3.0.10) lib/action_controller/metal/instrumentation.rb:29:inprocess_action'
actionpack (3.0.10) lib/abstract_controller/base.rb:119:in process' actionpack (3.0.10) lib/abstract_controller/rendering.rb:41:inprocess'
actionpack (3.0.10) lib/action_controller/metal.rb:138:in dispatch' actionpack (3.0.10) lib/action_controller/metal/rack_delegation.rb:14:indispatch'
actionpack (3.0.10) lib/action_controller/metal.rb:178:in block in action' actionpack (3.0.10) lib/action_dispatch/routing/route_set.rb:62:incall'
actionpack (3.0.10) lib/action_dispatch/routing/route_set.rb:62:in dispatch' actionpack (3.0.10) lib/action_dispatch/routing/route_set.rb:27:incall'
rack-mount (0.6.14) lib/rack/mount/route_set.rb:148:in block in call' rack-mount (0.6.14) lib/rack/mount/code_generation.rb:93:inblock in recognize'
rack-mount (0.6.14) lib/rack/mount/code_generation.rb:75:in optimized_each' rack-mount (0.6.14) lib/rack/mount/code_generation.rb:92:inrecognize'
rack-mount (0.6.14) lib/rack/mount/route_set.rb:139:in call' actionpack (3.0.10) lib/action_dispatch/routing/route_set.rb:493:incall'
sass (3.1.10) lib/sass/plugin/rack.rb:54:in call' warden (1.0.6) lib/warden/manager.rb:35:inblock in call'
warden (1.0.6) lib/warden/manager.rb:34:in catch' warden (1.0.6) lib/warden/manager.rb:34:incall'
actionpack (3.0.10) lib/action_dispatch/middleware/best_standards_support.rb:17:in call' actionpack (3.0.10) lib/action_dispatch/middleware/head.rb:14:incall'
rack (1.2.4) lib/rack/methodoverride.rb:24:in call' actionpack (3.0.10) lib/action_dispatch/middleware/params_parser.rb:21:incall'
actionpack (3.0.10) lib/action_dispatch/middleware/flash.rb:182:in call' actionpack (3.0.10) lib/action_dispatch/middleware/session/abstract_store.rb:149:incall'
actionpack (3.0.10) lib/action_dispatch/middleware/cookies.rb:302:in call' activerecord (3.0.10) lib/active_record/query_cache.rb:32:inblock in call'
activerecord (3.0.10) lib/active_record/connection_adapters/abstract/query_cache.rb:28:in cache' activerecord (3.0.10) lib/active_record/query_cache.rb:12:incache'
activerecord (3.0.10) lib/active_record/query_cache.rb:31:in call' activerecord (3.0.10) lib/active_record/connection_adapters/abstract/connection_pool.rb:354:incall'
actionpack (3.0.10) lib/action_dispatch/middleware/callbacks.rb:46:in block in call' activesupport (3.0.10) lib/active_support/callbacks.rb:416:in_run_call_callbacks'
actionpack (3.0.10) lib/action_dispatch/middleware/callbacks.rb:44:in call' rack (1.2.4) lib/rack/sendfile.rb:106:incall'
actionpack (3.0.10) lib/action_dispatch/middleware/remote_ip.rb:48:in call' actionpack (3.0.10) lib/action_dispatch/middleware/show_exceptions.rb:47:incall'
railties (3.0.10) lib/rails/rack/logger.rb:13:in call' rack (1.2.4) lib/rack/runtime.rb:17:incall'
activesupport (3.0.10) lib/active_support/cache/strategy/local_cache.rb:72:in call' rack (1.2.4) lib/rack/lock.rb:11:inblock in call'
internal:prelude:10:in synchronize' rack (1.2.4) lib/rack/lock.rb:11:incall'
actionpack (3.0.10) lib/action_dispatch/middleware/static.rb:30:in call' railties (3.0.10) lib/rails/application.rb:168:incall'
railties (3.0.10) lib/rails/application.rb:77:in method_missing' railties (3.0.10) lib/rails/rack/log_tailer.rb:14:incall'
rack (1.2.4) lib/rack/content_length.rb:13:in call' rack (1.2.4) lib/rack/handler/webrick.rb:52:inservice'
C:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:111:in service' C:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:70:inrun'
C:/Ruby192/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'

Can someone please help me

[codev]

If you're going to have will_paginate in your Gemfile it seems you need a specific version

gem 'will_paginate', "3.0.pre2"

Then bundle update and restart the app.

[nicolasblanco]

3.0.pre2 is so old...

[Gerhardk]

I have the following in my gemfile:
gem "will_paginate", ">=3.0.pre2"
and as slainer68 said will_paginate 3.0.pre2 is old there is a new version out will_paginate 3.0.pre4 is it fixed on this version or should I just use the 3.0.pre2 version

[codev]

You need that exact version - follow my instructions (get rid of the >= then update and restart). It's very old but it won't work otherwise. Switching to Kaminari for pagination, the gem that active admin uses, elsewhere is better if you can.

[Gerhardk]

Thanks it worked

[dogweather]

Huh - this error is still happening - why is this bug closed? I'm seeing it with will_paginate 3.0.3. Anyone have an idea why this is happening? I'll submit a fix.

[terfender]

same thing here... I hope it gets fixed soon

[joevandyk]

Seeing the error here.

[dankozlowski]

Getting this error with the activeadmin 0.4.3 and will_paginate 3.0.3.

Edit: There's also no way to downgrade since activeadmin requires 3.0.3 or above.

Edit: There's a fix here!
mislav/will_paginate#174

[dogweather]

It looks like the solution has been in the wiki: https://github.com/gregbell/active_admin/wiki/How-to-work-with-will_paginate

[kapsdewade]

comment the line of will_paginate in gemfile(Active admin plugin) and add gem "kaminari", "~> 0.13.0"... it worked for me :)

[gabemcmillan]

dogweather was right, followed the link added the initializer and it works again!!! Thanks dogweather!

[marthawurm]

dogweather's solution totally worked for me! :-)

[kirkonrails]

+1 dogweather's solution. Thank you!