我正在尝试制作表单并将技能和说明提交到数据库中。我差不多完成了，但是在提交我的信息之后我收到了这个错误：
NameError in SkillsController#create
uninitialized constant Skill::Description
它指向我控制器中的这个动作：
def create
@skills = Skill.new(skill_params)
if @skills.save
redirect_to :action => 'index'
else
@skills = Skill.find(:all)
render :action => 'new'
end
end
我在底部有一个定义params的私有方法：
private
def skill_params
params.require(:skill).permit(:description)
end
我希望这是足够的信息来找到问题，我会发布我的表格和技能。如果有人认为这会有所帮助。谢谢堆叠器和好运！我将继续调查错误，并非常感谢您对此事的任何帮助。
这是所要求的fullstack跟踪：
activerecord (4.1.2.rc1) lib/active_record/inheritance.rb:133:in `compute_type'
activerecord (4.1.2.rc1) lib/active_record/reflection.rb:221:in `klass'
activerecord (4.1.2.rc1) lib/active_record/associations/association.rb:214:in `raise_on_type_mismatch!'
activerecord (4.1.2.rc1) lib/active_record/associations/collection_association.rb:356:in `block in replace'
activerecord (4.1.2.rc1) lib/active_record/associations/collection_association.rb:356:in `each_char'
activerecord (4.1.2.rc1) lib/active_record/associations/collection_association.rb:356:in `replace'
activerecord (4.1.2.rc1) lib/active_record/associations/collection_association.rb:41:in `writer'
activerecord (4.1.2.rc1) lib/active_record/associations/builder/association.rb:118:in `description='
activerecord (4.1.2.rc1) lib/active_record/attribute_assignment.rb:45:in `public_send'
activerecord (4.1.2.rc1) lib/active_record/attribute_assignment.rb:45:in `_assign_attribute'
activerecord (4.1.2.rc1) lib/active_record/attribute_assignment.rb:32:in `block in assign_attributes'
activerecord (4.1.2.rc1) lib/active_record/attribute_assignment.rb:26:in `each'
activerecord (4.1.2.rc1) lib/active_record/attribute_assignment.rb:26:in `assign_attributes'
activerecord (4.1.2.rc1) lib/active_record/core.rb:455:in `init_attributes'
activerecord (4.1.2.rc1) lib/active_record/core.rb:198:in `initialize'
activerecord (4.1.2.rc1) lib/active_record/inheritance.rb:30:in `new'
activerecord (4.1.2.rc1) lib/active_record/inheritance.rb:30:in `new'
app/controllers/skills_controller.rb:29:in `create'
actionpack (4.1.2.rc1) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (4.1.2.rc1) lib/abstract_controller/base.rb:189:in `process_action'
actionpack (4.1.2.rc1) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (4.1.2.rc1) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:113:in `call'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:113:in `call'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:229:in `block in halting'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:229:in `call'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:229:in `block in halting'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:166:in `call'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:166:in `block in halting'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:166:in `call'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:166:in `block in halting'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:166:in `call'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:166:in `block in halting'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:86:in `call'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:86:in `run_callbacks'
actionpack (4.1.2.rc1) lib/abstract_controller/callbacks.rb:19:in `process_action'
actionpack (4.1.2.rc1) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (4.1.2.rc1) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action'
activesupport (4.1.2.rc1) lib/active_support/notifications.rb:159:in `block in instrument'
activesupport (4.1.2.rc1) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.1.2.rc1) lib/active_support/notifications.rb:159:in `instrument'
actionpack (4.1.2.rc1) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
actionpack (4.1.2.rc1) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
activerecord (4.1.2.rc1) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (4.1.2.rc1) lib/abstract_controller/base.rb:136:in `process'
actionview (4.1.2.rc1) lib/action_view/rendering.rb:30:in `process'
actionpack (4.1.2.rc1) lib/action_controller/metal.rb:196:in `dispatch'
actionpack (4.1.2.rc1) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
actionpack (4.1.2.rc1) lib/action_controller/metal.rb:232:in `block in action'
actionpack (4.1.2.rc1) lib/action_dispatch/routing/route_set.rb:82:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/routing/route_set.rb:82:in `dispatch'
actionpack (4.1.2.rc1) lib/action_dispatch/routing/route_set.rb:50:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/journey/router.rb:71:in `block in call'
actionpack (4.1.2.rc1) lib/action_dispatch/journey/router.rb:59:in `each'
actionpack (4.1.2.rc1) lib/action_dispatch/journey/router.rb:59:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/routing/route_set.rb:678:in `call'
warden (1.2.3) lib/warden/manager.rb:35:in `block in call'
warden (1.2.3) lib/warden/manager.rb:34:in `catch'
warden (1.2.3) lib/warden/manager.rb:34:in `call'
rack (1.5.2) lib/rack/etag.rb:23:in `call'
rack (1.5.2) lib/rack/conditionalget.rb:35:in `call'
rack (1.5.2) lib/rack/head.rb:11:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/middleware/flash.rb:254:in `call'
rack (1.5.2) lib/rack/session/abstract/id.rb:225:in `context'
rack (1.5.2) lib/rack/session/abstract/id.rb:220:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/middleware/cookies.rb:560:in `call'
activerecord (4.1.2.rc1) lib/active_record/query_cache.rb:36:in `call'
activerecord (4.1.2.rc1) lib/active_record/connection_adapters/abstract/connection_pool.rb:621:in `call'
activerecord (4.1.2.rc1) lib/active_record/migration.rb:380:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.1.2.rc1) lib/active_support/callbacks.rb:82:in `run_callbacks'
actionpack (4.1.2.rc1) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/middleware/reloader.rb:73:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/middleware/remote_ip.rb:76:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.1.2.rc1) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.1.2.rc1) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.1.2.rc1) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.1.2.rc1) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.1.2.rc1) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.1.2.rc1) lib/rails/rack/logger.rb:20:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.5.2) lib/rack/methodoverride.rb:21:in `call'
rack (1.5.2) lib/rack/runtime.rb:17:in `call'
activesupport (4.1.2.rc1) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call'
rack (1.5.2) lib/rack/lock.rb:17:in `call'
actionpack (4.1.2.rc1) lib/action_dispatch/middleware/static.rb:64:in `call'
rack (1.5.2) lib/rack/sendfile.rb:112:in `call'
railties (4.1.2.rc1) lib/rails/engine.rb:514:in `call'
railties（4.1.2.rc1）lib / rails / application.rb:144:in call'
rack (1.5.2) lib/rack/lock.rb:17:in call'
rack（1.5.2）lib / rack / content_length.rb:14:in call'
rack (1.5.2) lib/rack/handler/webrick.rb:60:in service'
C：/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/webrick/httpserver.rb:138:in service'
C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/webrick/httpserver.rb:94:in run'
C：/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/webrick/server.rb:295：在“start_thread中的块”中
这是我的架构：
create_table“技能”，force：true do | t | t.datetime“created_at” 端
我猜我需要做“rails generate”，接下来我会考虑在架构中添加描述。再次感谢大家，我知道我即将解决这个问题。
我运行了“rails generate migration AddDescriptionToSkills description：string”和“rake db：migrate”，我更新了schema.rb：
create_table "skills", force: true do |t|
t.datetime "created_at"
t.string "description"
end
但我仍然遇到同样的错误。再次感谢大家，我会及时通知你。