Rails的未定义的方法`模型名称”在形式局部

我有这样的模型：Rails的未定义的方法`模型名称”在形式局部

class ToType < ActiveRecord::Base 
    attr_accessible :Name, :TYP_CCM, :TYP_CCM_TAX, :TYP_CDS_ID, :TYP_CTM, :TYP_CYLINDERS, :TYP_DOORS, :TYP_HP_FROM, :TYP_HP_UPTO, :TYP_ID, :TYP_KV_ABS_DES_ID, :TYP_KV_ASR_DES_ID, :TYP_KV_AXLE_DES_ID, :TYP_KV_BODY_DES_ID, :TYP_KV_BRAKE_SYST_DES_ID, :TYP_KV_BRAKE_TYPE_DES_ID, :TYP_KV_CATALYST_DES_ID, :TYP_KV_DRIVE_DES_ID, :TYP_KV_ENGINE_DES_ID, :TYP_KV_FUEL_DES_ID, :TYP_KV_FUEL_SUPPLY_DES_ID, :TYP_KV_MODEL_DES_ID, :TYP_KV_STEERING_DES_ID, :TYP_KV_STEERING_SIDE_DES_ID, :TYP_KV_TRANS_DES_ID, :TYP_KV_VOLTAGE_DES_ID, :TYP_KW_FROM, :TYP_KW_UPTO, :TYP_LA_CTM, :TYP_LITRES, :TYP_MAX_WEIGHT, :TYP_MMT_CDS_ID, :TYP_MOD_ID, :TYP_PCON_END, :TYP_PCON_START, :TYP_RT_EXISTS, :TYP_SORT, :TYP_TANK, :TYP_VALVES, :is_in_to 
    set_primary_key :TYP_ID 
    belongs_to :to_model 
    has_many :to_articles, :foreign_key => "to_type_id", :dependent => :destroy 
end 

class ToArticle < ActiveRecord::Base 
    attr_accessible :details, :manufacturer, :name, :oem_number, :only_with_vin, :quantity, :to_type_id 
    belongs_to :to_type, :foreign_key => "TYP_ID" 
    belongs_to :to_engine 
end

（一些分贝，从大的目录变换，从而导轨约定是略微不完善）我的节目的视图的

部分to_type：

%td 
      = link_to "Подробнее", admin_catalog_to_to_article_path(c), :class=>'btn btn-primary' 
      = link_to "Редактирование", edit_admin_catalog_to_to_type_path(c), :class=>'btn btn-warning' 
      = link_to "Удалить", admin_catalog_to_to_type_path(c), :confirm => "!!!Тип #{c.Name} будет удалён!!!! Вы уверены?", :method => :delete, :class => "btn btn-danger"

我的表演动作正常工作为我的控制器相同：

class Admin::Catalog::To::ToTypesController < ApplicationController 
    respond_to :html 

    before_filter :auth_user 

    def auth_user 
    redirect_to new_admin_session_path unless admin_signed_in? 
    end 

    def show 
    @mod_id = params[:id] 
    @man = ToType.find(:all, conditions: {:TYP_MOD_ID => @mod_id}, order: "Name ASC") 
    render :layout => 'admin' 
    end 

    def edit 
    @man = ToType.find(params[:id]) 
    render :layout => 'admin' 
    end 

    def update 
    @man = ToType.find(params[:id]) 
    if @mod.update_attributes(params[:to_type]) 
     redirect_to admin_catalog_to_to_type_path(@man.TYP_MOD_ID) 
    else 
     render :layout => 'admin' 
    end 
    end 

    def new 
    @man = ToType.new 
    @mod_id = params[:mod_id] 
    render :layout => 'admin' 
    end 

    def create 
    @man = ToType.new(params[:to_type]) 
    @mod_id = params[:mod_id] 
    @man.TYP_MOD_ID = @mod_id 
    if @man.save 
     redirect_to admin_catalog_to_to_type_path(@mod_id) 
    else 
     render :layout => 'admin' 
    end 
    end 

    def destroy 
    @man = ToType.find(params[:id]) 
    if @man.destroy 
     redirect_to admin_catalog_to_to_type_path(@man.TYP_MOD_ID) 
    else 
     render :layout => 'admin' 
    end 
    end 
end 

and route: 

namespace :admin do 
    namespace :catalog do 
     namespace :to do 
     resources :to_manufacturers, 
        :to_models, 
        :to_types, 
        :to_articles 
     end 
    end 

    end

形式分：

= form_for [:admin, :catalog, :to, @man] do |f| 
    = f.label :id 
...

当我尝试编辑或创建我得到：

undefined method `model_name' for NilClass:Class

我觉得这事是错的与模型连接：与更新和创造。在日志中，我看到该对象创建在db中用于编辑，并且在日志中我可以看到@man不是空的，但我仍然获得undefined method model_name'for NilClass：Class`。为什么？

UPD：全跟踪

 NoMethodError in Admin/catalog/to/to_types#edit 

Showing /media/sf__Projects/Denis/app/views/admin/catalog/to/to_types/_edit.html.haml where line #1 raised: 

undefined method `model_name' for NilClass:Class 
Extracted source (around line #1): 

1: = form_for [:admin, :catalog, :to, @man] do |f| 
2: = f.label :id 
Trace of template inclusion: app/views/admin/catalog/to/to_types/edit.html.haml 

Rails.root: /media/sf__Projects/Denis 

Application Trace | Framework Trace | Full Trace 
activemodel (3.2.8) lib/active_model/naming.rb:163:in `model_name_from_record_or_class' 
activemodel (3.2.8) lib/active_model/naming.rb:158:in `param_key' 
actionpack (3.2.8) lib/action_view/helpers/form_helper.rb:369:in `form_for' 
haml (4.0.3) lib/haml/helpers/action_view_mods.rb:146:in `form_for_with_haml' 
haml (4.0.3) lib/haml/helpers/action_view_xss_mods.rb:28:in `form_for_with_haml_xss' 
app/views/admin/catalog/to/to_types/_edit.html.haml:1:in `_app_views_admin_catalog_to_to_types__edit_html_haml___4584370517694291299_51970960' 
actionpack (3.2.8) lib/action_view/template.rb:145:in `block in render' 
activesupport (3.2.8) lib/active_support/notifications.rb:125:in `instrument' 
actionpack (3.2.8) lib/action_view/template.rb:143:in `render' 
actionpack (3.2.8) lib/action_view/renderer/partial_renderer.rb:265:in `render_partial' 
actionpack (3.2.8) lib/action_view/renderer/partial_renderer.rb:238:in `block in render' 
actionpack (3.2.8) lib/action_view/renderer/abstract_renderer.rb:38:in `block in instrument' 
activesupport (3.2.8) lib/active_support/notifications.rb:123:in `block in instrument' 
activesupport (3.2.8) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (3.2.8) lib/active_support/notifications.rb:123:in `instrument' 
actionpack (3.2.8) lib/action_view/renderer/abstract_renderer.rb:38:in `instrument' 
actionpack (3.2.8) lib/action_view/renderer/partial_renderer.rb:237:in `render' 
actionpack (3.2.8) lib/action_view/renderer/renderer.rb:41:in `render_partial' 
actionpack (3.2.8) lib/action_view/helpers/rendering_helper.rb:27:in `render' 
haml (4.0.3) lib/haml/helpers/action_view_mods.rb:10:in `block in render_with_haml' 
haml (4.0.3) lib/haml/helpers.rb:89:in `non_haml' 
haml (4.0.3) lib/haml/helpers/action_view_mods.rb:10:in `render_with_haml' 
app/views/admin/catalog/to/to_types/edit.html.haml:7:in `_app_views_admin_catalog_to_to_types_edit_html_haml___2140731807560860717_28965400' 
actionpack (3.2.8) lib/action_view/template.rb:145:in `block in render' 
activesupport (3.2.8) lib/active_support/notifications.rb:125:in `instrument' 
actionpack (3.2.8) lib/action_view/template.rb:143:in `render' 
actionpack (3.2.8) lib/action_view/renderer/template_renderer.rb:47:in `block (2 levels) in render_template' 
actionpack (3.2.8) lib/action_view/renderer/abstract_renderer.rb:38:in `block in instrument' 
activesupport (3.2.8) lib/active_support/notifications.rb:123:in `block in instrument' 
activesupport (3.2.8) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (3.2.8) lib/active_support/notifications.rb:123:in `instrument' 
actionpack (3.2.8) lib/action_view/renderer/abstract_renderer.rb:38:in `instrument' 
actionpack (3.2.8) lib/action_view/renderer/template_renderer.rb:46:in `block in render_template' 
actionpack (3.2.8) lib/action_view/renderer/template_renderer.rb:54:in `render_with_layout' 
actionpack (3.2.8) lib/action_view/renderer/template_renderer.rb:45:in `render_template' 
actionpack (3.2.8) lib/action_view/renderer/template_renderer.rb:18:in `render' 
actionpack (3.2.8) lib/action_view/renderer/renderer.rb:36:in `render_template' 
actionpack (3.2.8) lib/action_view/renderer/renderer.rb:17:in `render' 
actionpack (3.2.8) lib/abstract_controller/rendering.rb:110:in `_render_template' 
actionpack (3.2.8) lib/action_controller/metal/streaming.rb:225:in `_render_template' 
actionpack (3.2.8) lib/abstract_controller/rendering.rb:103:in `render_to_body' 
actionpack (3.2.8) lib/action_controller/metal/renderers.rb:28:in `render_to_body' 
actionpack (3.2.8) lib/action_controller/metal/compatibility.rb:50:in `render_to_body' 
actionpack (3.2.8) lib/abstract_controller/rendering.rb:88:in `render' 
actionpack (3.2.8) lib/action_controller/metal/rendering.rb:16:in `render' 
actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:40:in `block (2 levels) in render' 
activesupport (3.2.8) lib/active_support/core_ext/benchmark.rb:5:in `block in ms' 
/home/pavel/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/benchmark.rb:295:in `realtime' 
activesupport (3.2.8) lib/active_support/core_ext/benchmark.rb:5:in `ms' 
actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:40:in `block in render' 
actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:83:in `cleanup_view_runtime' 
activerecord (3.2.8) lib/active_record/railties/controller_runtime.rb:24:in `cleanup_view_runtime' 
actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:39:in `render' 
app/controllers/admin/catalog/to/to_types_controller.rb:18:in `edit' 
actionpack (3.2.8) lib/action_controller/metal/implicit_render.rb:4:in `send_action' 
actionpack (3.2.8) lib/abstract_controller/base.rb:167:in `process_action' 
actionpack (3.2.8) lib/action_controller/metal/rendering.rb:10:in `process_action' 
actionpack (3.2.8) lib/abstract_controller/callbacks.rb:18:in `block in process_action' 
activesupport (3.2.8) lib/active_support/callbacks.rb:447:in `_run__3422493215220642812__process_action__1624115620138968240__callbacks' 
activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `__run_callback' 
activesupport (3.2.8) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks' 
activesupport (3.2.8) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (3.2.8) lib/abstract_controller/callbacks.rb:17:in `process_action' 
actionpack (3.2.8) lib/action_controller/metal/rescue.rb:29:in `process_action' 
actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action' 
activesupport (3.2.8) lib/active_support/notifications.rb:123:in `block in instrument' 
activesupport (3.2.8) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (3.2.8) lib/active_support/notifications.rb:123:in `instrument' 
actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:29:in `process_action' 
actionpack (3.2.8) lib/action_controller/metal/params_wrapper.rb:207:in `process_action' 
activerecord (3.2.8) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
actionpack (3.2.8) lib/abstract_controller/base.rb:121:in `process' 
actionpack (3.2.8) lib/abstract_controller/rendering.rb:45:in `process' 
actionpack (3.2.8) lib/action_controller/metal.rb:203:in `dispatch' 
actionpack (3.2.8) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' 
actionpack (3.2.8) lib/action_controller/metal.rb:246:in `block in action' 
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:73:in `call' 
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:73:in `dispatch' 
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:36:in `call' 
journey (1.0.4) lib/journey/router.rb:68:in `block in call' 
journey (1.0.4) lib/journey/router.rb:56:in `each' 
journey (1.0.4) lib/journey/router.rb:56:in `call' 
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:600:in `call' 
warden (1.2.1) lib/warden/manager.rb:35:in `block in call' 
warden (1.2.1) lib/warden/manager.rb:34:in `catch' 
warden (1.2.1) lib/warden/manager.rb:34:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' 
rack (1.4.5) lib/rack/etag.rb:23:in `call' 
rack (1.4.5) lib/rack/conditionalget.rb:25:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/head.rb:14:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/params_parser.rb:21:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/flash.rb:242:in `call' 
rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context' 
rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/cookies.rb:339:in `call' 
activerecord (3.2.8) lib/active_record/query_cache.rb:64:in `call' 
activerecord (3.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call' 
activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `_run__2440713806940417433__call__2360308109704352565__callbacks' 
activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `__run_callback' 
activesupport (3.2.8) lib/active_support/callbacks.rb:385:in `_run_call_callbacks' 
activesupport (3.2.8) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (3.2.8) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/reloader.rb:65:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/remote_ip.rb:31:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call' 
railties (3.2.8) lib/rails/rack/logger.rb:26:in `call_app' 
railties (3.2.8) lib/rails/rack/logger.rb:16:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/request_id.rb:22:in `call' 
rack (1.4.5) lib/rack/methodoverride.rb:21:in `call' 
rack (1.4.5) lib/rack/runtime.rb:17:in `call' 
activesupport (3.2.8) lib/active_support/cache/strategy/local_cache.rb:72:in `call' 
rack (1.4.5) lib/rack/lock.rb:15:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/static.rb:62:in `call' 
railties (3.2.8) lib/rails/engine.rb:479:in `call' 
railties (3.2.8) lib/rails/application.rb:223:in `call' 
rack (1.4.5) lib/rack/content_length.rb:14:in `call' 
railties (3.2.8) lib/rails/rack/log_tailer.rb:17:in `call' 
rack (1.4.5) lib/rack/handler/webrick.rb:59:in `service' 
/home/pavel/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service' 
/home/pavel/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run' 
/home/pavel/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread' 
Request 

Parameters: 

{"id"=>"28752"} 
Show session dump 

Show env dump 

Response 

Headers: 

None

来源

2013-08-01 brabertaser19

我也尝试重命名为to_engines：没有帮助...我不明白为什么？（ – brabertaser19

错误说你在等待一个对象时没有nil，在编辑代码中，你不检查find（）是否返回记录，如果你传入一个不存在的id，会发生什么在数据库中？ – Fred

@Fred但我看到它从db它选择数据 – brabertaser19

看起来太容易了，但如果是@typ定义？控制器中有@typ部分，但@man。

来源

2013-08-14 12:01:53 zrl3dx

对不起，这是其他的部分...新的还有其他对象，当是一个同样的对象，我得到错误..我eddited问题 – brabertaser19

所以你现在怎么想？ – brabertaser19

尝试使用'form_for [：admin，：catalog，to，ToType.new]'测试它并显示输出。 – zrl3dx

这个有你的形式form_for [:admin, :catalog, :to, @typ]，但你也没有对象@typ - 你有@man

来源

2013-08-14 12:01:40

对不起，这是其他部分...新有其他对象，当是一个相同的对象，我得到错误..我编辑了问题 – brabertaser19

，现在什么是错误的完全追踪？你还有@typ在那里 –

@yes，我更新了代码，忘了这个名字（我改变了代码，忘记更新全部），问题不在 – brabertaser19

Rails的未定义的方法`模型名称”在形式局部

回答

相关问题