Hi, Me too got same error... I attached Full trace here... Kindly suggest on this issue...
undefined method `eq' for nil:NilClass activesupport (3.0.0) lib/active_support/whiny_nil.rb:48:in `method_missing' activerecord (3.0.0) lib/active_record/relation/finder_methods.rb: 291:in `find_one' activerecord (3.0.0) lib/active_record/relation/finder_methods.rb: 281:in `find_with_ids' activerecord (3.0.0) lib/active_record/relation/finder_methods.rb: 107:in `find' activerecord (3.0.0) lib/active_record/base.rb:439:in `find' app/models/taxa.rb:2:in `<class:Taxa>' app/models/taxa.rb:1:in `<top (required)>' activesupport (3.0.0) lib/active_support/dependencies.rb:454:in `load' activesupport (3.0.0) lib/active_support/dependencies.rb:454:in `block in load_file' activesupport (3.0.0) lib/active_support/dependencies.rb:591:in `new_constants_in' activesupport (3.0.0) lib/active_support/dependencies.rb:453:in `load_file' activesupport (3.0.0) lib/active_support/dependencies.rb:340:in `require_or_load' activesupport (3.0.0) lib/active_support/dependencies.rb:491:in `load_missing_constant' activesupport (3.0.0) lib/active_support/dependencies.rb:183:in `block in const_missing' activesupport (3.0.0) lib/active_support/dependencies.rb:181:in `each' activesupport (3.0.0) lib/active_support/dependencies.rb:181:in `const_missing' activesupport (3.0.0) lib/active_support/dependencies.rb:503:in `load_missing_constant' activesupport (3.0.0) lib/active_support/dependencies.rb:183:in `block in const_missing' activesupport (3.0.0) lib/active_support/dependencies.rb:181:in `each' activesupport (3.0.0) lib/active_support/dependencies.rb:181:in `const_missing' app/controllers/taxas_controller.rb:5:in `index' actionpack (3.0.0) lib/action_controller/metal/implicit_render.rb:4:in `send_action' actionpack (3.0.0) lib/abstract_controller/base.rb:150:in `process_action' actionpack (3.0.0) lib/action_controller/metal/rendering.rb:11:in `process_action' actionpack (3.0.0) lib/abstract_controller/callbacks.rb:18:in `block in process_action' activesupport (3.0.0) lib/active_support/callbacks.rb:435:in `_run__402958380944449391__process_action__4448255831886203218__callbacks' activesupport (3.0.0) lib/active_support/callbacks.rb:409:in `_run_process_action_callbacks' activesupport (3.0.0) lib/active_support/callbacks.rb:93:in `run_callbacks' actionpack (3.0.0) lib/abstract_controller/callbacks.rb:17:in `process_action' actionpack (3.0.0) lib/action_controller/metal/instrumentation.rb: 30:in `block in process_action' activesupport (3.0.0) lib/active_support/notifications.rb:52:in `block in instrument' activesupport (3.0.0) lib/active_support/notifications/instrumenter.rb: 21:in `instrument' activesupport (3.0.0) lib/active_support/notifications.rb:52:in `instrument' actionpack (3.0.0) lib/action_controller/metal/instrumentation.rb: 29:in `process_action' actionpack (3.0.0) lib/action_controller/metal/rescue.rb:17:in `process_action' actionpack (3.0.0) lib/abstract_controller/base.rb:119:in `process' actionpack (3.0.0) lib/abstract_controller/rendering.rb:40:in `process' actionpack (3.0.0) lib/action_controller/metal.rb:133:in `dispatch' actionpack (3.0.0) lib/action_controller/metal/rack_delegation.rb: 14:in `dispatch' actionpack (3.0.0) lib/action_controller/metal.rb:173:in `block in action' actionpack (3.0.0) lib/action_dispatch/routing/route_set.rb:62:in `call' actionpack (3.0.0) lib/action_dispatch/routing/route_set.rb:62:in `dispatch' actionpack (3.0.0) lib/action_dispatch/routing/route_set.rb:27:in `call' rack-mount (0.6.13) lib/rack/mount/route_set.rb:148:in `block in call' rack-mount (0.6.13) lib/rack/mount/code_generation.rb:93:in `block in recognize' rack-mount (0.6.13) lib/rack/mount/code_generation.rb:68:in `optimized_each' rack-mount (0.6.13) lib/rack/mount/code_generation.rb:92:in `recognize' rack-mount (0.6.13) lib/rack/mount/route_set.rb:139:in `call' actionpack (3.0.0) lib/action_dispatch/routing/route_set.rb:492:in `call' actionpack (3.0.0) lib/action_dispatch/middleware/ best_standards_support.rb:17:in `call' actionpack (3.0.0) lib/action_dispatch/middleware/head.rb:14:in `call' rack (1.2.1) lib/rack/methodoverride.rb:24:in `call' actionpack (3.0.0) lib/action_dispatch/middleware/params_parser.rb: 21:in `call' actionpack (3.0.0) lib/action_dispatch/middleware/flash.rb:182:in `call' actionpack (3.0.0) lib/action_dispatch/middleware/session/ abstract_store.rb:149:in `call' actionpack (3.0.0) lib/action_dispatch/middleware/cookies.rb:287:in `call' activerecord (3.0.0) lib/active_record/query_cache.rb:32:in `block in call' activerecord (3.0.0) lib/active_record/connection_adapters/abstract/ query_cache.rb:28:in `cache' activerecord (3.0.0) lib/active_record/query_cache.rb:12:in `cache' activerecord (3.0.0) lib/active_record/query_cache.rb:31:in `call' activerecord (3.0.0) lib/active_record/connection_adapters/abstract/ connection_pool.rb:355:in `call' actionpack (3.0.0) lib/action_dispatch/middleware/callbacks.rb:46:in `block in call' activesupport (3.0.0) lib/active_support/callbacks.rb:415:in `_run_call_callbacks' actionpack (3.0.0) lib/action_dispatch/middleware/callbacks.rb:44:in `call' rack (1.2.1) lib/rack/sendfile.rb:107:in `call' actionpack (3.0.0) lib/action_dispatch/middleware/remote_ip.rb:48:in `call' actionpack (3.0.0) lib/action_dispatch/middleware/show_exceptions.rb: 46:in `call' railties (3.0.0) lib/rails/rack/logger.rb:13:in `call' rack (1.2.1) lib/rack/runtime.rb:17:in `call' activesupport (3.0.0) lib/active_support/cache/strategy/local_cache.rb: 72:in `call' rack (1.2.1) lib/rack/lock.rb:11:in `block in call' <internal:prelude>:10:in `synchronize' rack (1.2.1) lib/rack/lock.rb:11:in `call' actionpack (3.0.0) lib/action_dispatch/middleware/static.rb:30:in `call' railties (3.0.0) lib/rails/application.rb:168:in `call' railties (3.0.0) lib/rails/application.rb:77:in `method_missing' railties (3.0.0) lib/rails/rack/log_tailer.rb:14:in `call' rack (1.2.1) lib/rack/content_length.rb:13:in `call' rack (1.2.1) lib/rack/handler/webrick.rb:52:in `service' /usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service' /usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run' /usr/local/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread' On Aug 18, 1:56 pm, Colin Law <[email protected]> wrote: > On 18 August 2010 12:36, Abder-Rahman Ali <[email protected]> wrote: > > > I'm walking through an example in the "Head First Rails" book, but, > > instead doing the examples using Rails3.0.0.rc. > > > But, I'm getting this error when browsing for example: > > >http://localhost:3000/advs/1 > > > undefined method `eq' for nil:NilClass > > For an error like this it is better to show the full error trace, but > first look at it yourself. Somewhere there you will usually find a > reference to a line of your code. Look carefully at that line and the > error and try and work out the problem yourself. The error is saying > that you are trying to call a method on an object that is nil. A > common cause of this is using the result of a find operation without > checking that it did in fact find a record. > > If you still cannot see the problem then post the error trace and the > code around the error. > > > > > Provided that my advs_controller.rb is as follows: > > >http://pastie.org/private/cd9zntg2ite57ept288kfa > > For only a few lines of code it is better in my opinion to put it > inline rather than a pastie. Particularly consider those who may find > the thread in months and years yet to come, hoping for enlightenment, > only to find that the pastie has disappeared. > > Colin -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. 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