Critical Rails 3 scaffold error - undefined method `to_sym' for nil:NilClass

rubyonrails-core
1

$ script/generate scaffold Post name:string index /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ruby/ 1.9.1/gems/activesupport-3.0.pre/lib/active_support/whiny_nil.rb:49:in `method_missing': undefined method `to_sym' for nil:NilClass (NoMethodError)   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/ generated_attribute.rb:7:in `initialize'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/named_base.rb: 52:in `new'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/named_base.rb: 52:in `block in parse_attributes!'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/named_base.rb: 50:in `map'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/named_base.rb: 50:in `parse_attributes!'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/named_base.rb: 22:in `initialize'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/ resource_helpers.rb:25:in `initialize'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/vendor/thor-0.12.3/lib/thor/ group.rb:35:in `new'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/vendor/thor-0.12.3/lib/thor/ group.rb:35:in `block in start'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/vendor/thor-0.12.3/lib/thor/ base.rb:354:in `start'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/vendor/thor-0.12.3/lib/thor/ group.rb:28:in `start'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators.rb:163:in `invoke'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/railties-3.0.pre/lib/rails/commands/generate.rb:10:in `<top (required)>'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/activesupport-3.0.pre/lib/active_support/ dependencies.rb:167:in `require'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/activesupport-3.0.pre/lib/active_support/ dependencies.rb:167:in `block in require'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/activesupport-3.0.pre/lib/active_support/ dependencies.rb:537:in `new_constants_in'   from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ ruby/1.9.1/gems/activesupport-3.0.pre/lib/active_support/ dependencies.rb:167:in `require'   from script/generate:3:in `<main>'

I get this error in all the rails 3 applications I have so far created :frowning:

2

$ script/generate scaffold Post name:string index

/Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/ruby/

1.9.1/gems/activesupport-3.0.pre/lib/active_support/whiny_nil.rb:49:in

method_missing': undefined method to_sym’ for nil:NilClass

(NoMethodError)

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/

generated_attribute.rb:7:in `initialize’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/named_base.rb:

52:in `new’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/named_base.rb:

52:in `block in parse_attributes!’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/named_base.rb:

50:in `map’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/named_base.rb:

50:in `parse_attributes!’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/named_base.rb:

22:in `initialize’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators/

resource_helpers.rb:25:in `initialize’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/vendor/thor-0.12.3/lib/thor/

group.rb:35:in `new’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/vendor/thor-0.12.3/lib/thor/

group.rb:35:in `block in start’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/vendor/thor-0.12.3/lib/thor/

base.rb:354:in `start’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/vendor/thor-0.12.3/lib/thor/

group.rb:28:in `start’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/generators.rb:163:in

`invoke’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/railties-3.0.pre/lib/rails/commands/generate.rb:10:in

`<top (required)>’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/activesupport-3.0.pre/lib/active_support/

dependencies.rb:167:in `require’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/activesupport-3.0.pre/lib/active_support/

dependencies.rb:167:in `block in require’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/activesupport-3.0.pre/lib/active_support/

dependencies.rb:537:in `new_constants_in’

    from /Users/kristianconsult/my_rails/rails3_apps/r3_test/vendor/gems/

ruby/1.9.1/gems/activesupport-3.0.pre/lib/active_support/

dependencies.rb:167:in `require’

    from script/generate:3:in `<main>'

I get this error in all the rails 3 applications I have so far

created :frowning:

I think you are using it incorrectly. Don’t you do this?

script/generate scaffold Post name:string

Anuj

3

Yes, for some reason it used to be that you would specify first the model/controller name, then the attributes of the model and then the actions of the generated controller. Now you can only specify controller/model and attributes for some reason.

Still, scaffold doesn't work at all with the rails3_datamapper project :frowning:

$ script/generate scaffold Post /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/activesupport/lib/active_support/ dependencies.rb:601:in `to_constant_name': Anonymous modules have no name to be referenced by (ArgumentError)   from /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/activesupport/lib/active_support/ dependencies.rb:407:in `qualified_name_for'   from /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/activesupport/lib/active_support/ dependencies.rb:115:in `rescue in const_missing' ..

Am I missing some inportant initialization step?

$ bin/rake db:create (in /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3) Creating database 'rails3_development' kristian-mandrups-macbook-pro:datamapper_on_rails3 kristianconsult$ bin/rake db:automigrate (in /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3) rake aborted! Anonymous modules have no name to be referenced by

(See full trace by running task with --trace) kristian-mandrups-macbook-pro:datamapper_on_rails3 kristianconsult$ bin/rake db:automigrate --trace (in /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3) ** Invoke db:automigrate (first_time) ** Invoke db:load_models (first_time) ** Invoke environment (first_time) ** Execute environment rake aborted! Anonymous modules have no name to be referenced by /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/activesupport/lib/active_support/ dependencies.rb:601:in `to_constant_name' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/activesupport/lib/active_support/ dependencies.rb:407:in `qualified_name_for' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/activesupport/lib/active_support/ dependencies.rb:115:in `rescue in const_missing' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/activesupport/lib/active_support/ dependencies.rb:105:in `const_missing' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails3_datamapper/lib/rails3_datamapper/ railtie.rb:62:in `block in <class:Railtie>' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/railties/lib/rails/initializable.rb: 23:in `instance_exec' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/railties/lib/rails/initializable.rb: 23:in `run' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/railties/lib/rails/initializable.rb: 61:in `block in run_initializers' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/railties/lib/rails/initializable.rb: 60:in `each' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/railties/lib/rails/initializable.rb: 60:in `run_initializers' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/railties/lib/rails/application.rb: 63:in `initialize!' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/dirs/rails/railties/lib/rails/application.rb: 104:in `block in initialize_tasks' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:636:in `call' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:636:in `block in execute' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:631:in `each' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:631:in `execute' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:597:in `block in invoke_with_call_chain' /opt/local/lib/ruby/1.9.1/monitor.rb:190:in `mon_synchronize' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:607:in `block in invoke_prerequisites' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:604:in `each' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:596:in `block in invoke_with_call_chain' /opt/local/lib/ruby/1.9.1/monitor.rb:190:in `mon_synchronize' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:607:in `block in invoke_prerequisites' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:604:in `each' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:596:in `block in invoke_with_call_chain' /opt/local/lib/ruby/1.9.1/monitor.rb:190:in `mon_synchronize' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:583:in `invoke' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in `block (2 levels) in top_level' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in `each' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in `block in top_level' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2001:in `block in run' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:1998:in `run' /Users/kristianconsult/my_rails/rails3_apps/datamapper_on_rails3/ vendor/gems/ruby/1.9.1/gems/rake-0.8.7/bin/rake:31:in `<top (required)

'

bin/rake:3:in `load' bin/rake:3:in `<main>' kristian-mandrups-macbook-pro:datamapper_on_rails3 kristianconsult$