营养中的NoMethodError＃新 - 未定义的方法''为零：NilClass

Question

我在我的nifty_scaffold中有错误... 由于某种原因（没有更改任何标准代码，检查了routes.rb，...） ，创造一种新的营养是行不通的。

任何人都可以解释我如何以及解决方案是什么？

我想我已经包括了所有necessairy代码...

详细的错误是： 未定义的方法`generated_methods'的零：NilClass

路线包括：

map.resources :nutritions 

查看：新

<% title "New Nutrition" %> 
<%= render :partial => 'form' %> 
<p><%= link_to "Back to List", nutritions_path %></p> 

查看：_form

<% form_for @nutrition do |f| %> 
    <%= f.error_messages %> 
    <p> 
    <%= f.label :name %><br /> 
    <%= f.text_field :name %> 
    </p> 
    <p> 
    <%= f.label :description %><br /> 
    <%= f.text_area :description %> 
    </p> 
    <p> 
    <%= f.label :ammount %><br /> 
    <%= f.text_field :ammount %> 
    </p> 
    <p> 
    <%= f.label :unit %><br /> 
    <%= f.text_field :unit %> 
    </p> 
    <p> 
    <%= f.label :kcal %><br /> 
    <%= f.text_field :kcal %> 
    </p> 
    <p> 
    <%= f.label :protein %><br /> 
    <%= f.text_field :protein %> 
    </p> 
    <p> 
    <%= f.label :carb %><br /> 
    <%= f.text_field :carb %> 
    </p> 
    <p> 
    <%= f.label :fat %><br /> 
    <%= f.text_field :fat %> 
    </p> 
    <p> 
    <%= f.label :type %><br /> 
    <%= f.text_field :type %> 
    </p> 
    <p> 
    <%= f.label :class %><br /> 
    <%= f.text_field :class %> 
    </p> 
    <p><%= f.submit "Submit" %></p> 
<% end %> 

我的营养控制器

def new 
    @nutrition = Nutrition.new 
    #raise @progress.inspect (debug porpose, didn't help) 
    end 

这是完整的跟踪

C：/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib /active_support/whiny_nil.rb:52:in method_missing' C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:352:in respond_to？' C：/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/array/wrapper.rb：14：wrap' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/helpers/active_record_helper.rb:174:in error_messages_for'C：/ ruby​​/lib/ruby​​/gems/1.8/gems/actionpack-2.3.5/lib/action_view/helpers/form_helper.rb：1012：in error_messages' D:/Workspace/Aptana/UltimateJournal/app/views/nutritions/_form.html.erb:3:in _run_erb_app47views47nutritions47_form46html46erb_locals_form_object'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view /helpers/form_helper.rb:499:in fields_for' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/helpers/form_helper.rb:282:in form_for'D：/Workspace/Aptana/UltimateJournal/app/views/nutritions/_form.html.erb：2：in _run_erb_app47views47nutritions47_form46html46erb_locals_form_object' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/renderable.rb:34:in send'C：/ ruby​​/lib/ruby​​/gems /1.8/gems/actionpack-2.3.5/lib/action_view/renderable.rb:34:in render' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:306:in with_template'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/ renderable.rb：30：render' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/renderable_partial.rb:20:in render'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb：26：in benchmark' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in ms'C：/ ruby​​/LIB /红宝石/宝石/ 1.8 /宝石/ activesup port-2.3.5/lib/active_support/core_ext/benchmark.rb：10：在realtime' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in ms'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb ：26：benchmark' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/renderable_partial.rb:19:in render'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/template.rb：205：render_template' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/renderable_partial.rb:44:in render_partial'C：/ ruby​​/lib/ruby /gems/1.8/gems/actionpack-2.3.5/lib/action_view/partials.rb:184:in render_partial' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:267:in render'D：/Workspace/Aptana/UltimateJournal/app/views/nutritions/new.html.erb：3：在_run_erb_app47views47nutritions47new46html46erb' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/renderable.rb:34:in发送'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/renderable.rb：34：在render' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:306:in with_template'C：/ ruby​​/lib/ruby​​/gems/1.8/gems/actionpack-2.3.5/lib/action_view/renderable.rb：30：render' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/template.rb:205:in render_template'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/base .rb：265：render' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:348:in _render_with_layout'C：/ruby/lib/ruby/gems/1.8/gems/actio npack-2.3.5/lib/action_view/base.rb：262：在render' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:1250:in render_for_file'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb：945 ：render_without_benchmark' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:51:in render'C：/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb：17：在ms' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:10:in实时'C：/ ruby​​/lib/ruby /gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in ms' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:51:in render'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/ lib/action_controller/base.rb：1326：default_render' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:1332:in perform_action_without_filters'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/filters。rb：617：call_filters' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:610:in perform_action_without_benchmark'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb：68：在perform_action_without_rescue' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in ms'C：/ ruby​​/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb：10：在realtime' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in ms'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5 /lib/action_controller/benchmarking.rb:68:in perform_action_without_rescue' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/rescue.rb:160:in perform_action_without_flash'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/flash.rb：146：在perform_action' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in发送' C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb：532：在process_without_filters' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:606:in进程'C：/ruby/lib/ruby/gems/1.8/gems/ actionpack-2.3.5/lib/action_controller/base.rb：391：在process' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:386:in调用'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/routing/route_set.rb ：437：在call' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:87:in调度'C：/ ruby​​/lib/ruby​​/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb：121：在_call' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:130:in build_middleware_stack'C：/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record /query_cache.rb:29:in call' C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:29:in调用'C：/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/query_cache.rb：34：in cache' C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:9:in cache' C：/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb：28：在call' C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in调用'C：/ruby/lib/ruby/gems/1.8/gems/ actionpack-2.3.5/lib/action_controller/string_coercion.rb：25：在call' C:/ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/head.rb:9:in调用'C：/ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/methodoverride.rb：24 ：在call' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/params_parser.rb:15:in调用'C：/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/session/cookie_store.rb：93：在call' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/failsafe.rb:26:in中调用'C：/ ruby​​/lib/ruby /gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in call' C:/ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in sy nchronize'C：/ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb：11：在call' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:114:in调用'C：/ruby/lib/ruby/gems/1.8/ gems/actionpack-2.3.5/lib/action_controller/reloader.rb：34：在run' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:108:in调用'C：/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/rack/static .rb：31：在call' C:/ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:46:in调用'C：/ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb：40：在each' C:/ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in调用'C：/ ruby​​/lib /ruby/gems/1.8/gems/rails-2.3.5/lib/rails/rack/log_tailer.rb:17:in call' C:/ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/content_length.rb:13:in调用'C：/ruby/lib/ruby/gems/1.8/gems/rack-1.0。 1/lib/rack/chunked.rb：15：在call' C:/ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/handler/mongrel.rb:64:in进程'C：/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/mongrel.rb：159 ：在process_client' C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/mongrel.rb:158:in每个'C：/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/mongrel.rb：158：在process_client' C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/mongrel.rb:285:in运行'C：/ ruby​​/lib /ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/mongrel.rb:285:in initialize' C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/mongrel.rb:285:in new'C：/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/mongrel.rb：285：in run' C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/mongrel.rb:268:in initialize'C：/ ruby​​/lib/ruby /gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/mongrel.rb:268:in new' C:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/mongrel.rb:268:in运行'C：/ruby/lib/ruby/gems/1.8/gems/rack-1.0。 1/LIB /齿条/处理/ mongrel.rb：34：在run' C:/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/commands/server.rb:111 C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require” C：/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb：31：在require' script/server:3-e:2:in load'-E：2

Answer 1

它看起来不错，只是将一个属性命名为“class”似乎不是一个好主意，通常它非常保留字...