undefined method `all' for MyModel:Module

rubyonrails-talk
1

I am in the middle of upgrading an application which is only at 2.3 to rails 3.0 (Then to rails 3.1) Iv'e gotten the application to begin running. And it can load some models. For example in users I can - Query user.first. But in this model if I call MyModel.all I get a undefined method. So I'm a bit stuck, and un sure what todo to get it working.

app/controllers/home_controller.rb:14:in `index' 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:in `process_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:in `block in process_action' activesupport (3.0.10) lib/active_support/callbacks.rb:451:in `_run__3961353178525835648__process_action__2666700228330603719__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:in `process_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:in `block 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:in `instrument' activesupport (3.0.10) lib/active_support/notifications.rb:52:in `instrument' actionpack (3.0.10) lib/action_controller/metal/instrumentation.rb: 29:in `process_action' actionpack (3.0.10) lib/abstract_controller/base.rb:119:in `process' actionpack (3.0.10) lib/abstract_controller/rendering.rb:41:in `process' actionpack (3.0.10) lib/action_controller/metal.rb:138:in `dispatch' actionpack (3.0.10) lib/action_controller/metal/rack_delegation.rb: 14:in `dispatch' 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:in `call' 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:in `call' 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:in `block 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 (3.0.10) lib/action_dispatch/routing/route_set.rb:493:in `call' 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:in `call' rack (1.2.4) lib/rack/methodoverride.rb:24:in `call' actionpack (3.0.10) lib/action_dispatch/middleware/params_parser.rb: 21:in `call' 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:in `call' actionpack (3.0.10) lib/action_dispatch/middleware/cookies.rb:302:in `call' activerecord (3.0.10) lib/active_record/query_cache.rb:32:in `block 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:in `cache' 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:in `call' 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:in `call' 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:in `call' railties (3.0.10) lib/rails/rack/logger.rb:13:in `call' rack (1.2.4) lib/rack/runtime.rb:17:in `call' activesupport (3.0.10) lib/active_support/cache/strategy/ local_cache.rb:72:in `call' rack (1.2.4) lib/rack/lock.rb:11:in `block in call' <internal:prelude>:10:in `synchronize' rack (1.2.4) lib/rack/lock.rb:11:in `call' actionpack (3.0.10) lib/action_dispatch/middleware/static.rb:30:in `call' railties (3.0.10) lib/rails/application.rb:168:in `call' railties (3.0.10) lib/rails/application.rb:77:in `method_missing' railties (3.0.10) lib/rails/rack/log_tailer.rb:14:in `call' rack (1.2.4) lib/rack/content_length.rb:13:in `call' rack (1.2.4) lib/rack/handler/webrick.rb:52:in `service' /Users/tspore/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/ httpserver.rb:111:in `service' /Users/tspore/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/ httpserver.rb:70:in `run' /Users/tspore/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/webrick/ server.rb:183:in `block in start_thread'

Can someone help me here?

2

I am in the middle of upgrading an application which is only at 2.3 to rails 3.0 (Then to rails 3.1) Iv'e gotten the application to begin running. And it can load some models. For example in users I can - Query user.first. But in this model if I call MyModel.all I get a undefined method. So I'm a bit stuck, and un sure what todo to get it working.

What is MyModel ? The error implies it's not actually an active record class

Fred

3

Right. MyModel - would be in Theory the AR model, but it seems to be erring out on the Helper. (Which it also has) So for some reason I have a few of the upgraded models, which I can't run basic querries against. But some which I can. However, I don't see anything which would not allow those selected models to be ran again AR queries. class MyModel < ActiveRecord::Base     ........... end module MyModelHelper    ............ end

4

Right. MyModel - would be in Theory the AR model, but it seems to be erring out on the Helper. (Which it also has) So for some reason I have a few of the upgraded models, which I can't run basic querries against. But some which I can. However, I don't see anything which would not allow those selected models to be ran again AR queries.

Is there a module call MyModel that might be shadowing your active record class ?

Fred

5

What I'm thinking is that my application is called the same name as MyModel so in Application i'm loading in module MyModel But that is calling -     class Application < Rails::Application .... end

But I'm not really sure how else to debug this. Anythoughts?

6

What I'm thinking is that my application is called the same name as MyModel so in Application i'm loading in module MyModel

ah, if you're defining

module MyModel end

somewhere like that then you can't also have

class MyModel < AR:Base end

in development mode it will just never load the AR class, in production it would try and fail (since my model cannot be a class and a module). You're going to have to pick non clashing names (the application name is probably easiest to change)

Fred

7

Thank you very much for helping me think through this. Its a old project, where upgrading it is going to be a couple week process.