ruby on rails - NoMethodError in Contacts#new -

i following tutorial "coder manual" , trying create contact form. seems have in place not work.

contacts_controller

class contactscontroller < applicationcontroller   def new     @contact = contact.new   end    def create   end end   class createcontacts < activerecord::migration   def change     create_table :contacts |t|       t.string :name       t.string :email       t.text :comments       t.timestamps     end   end end 

this new.html.erb

<div class="row">   <div class="col-md-4 col-md-offset-4">     <div class="well">       <%= form_for @contact |f| %>         <div class="form-group">           <%= f.label :name %>           <%= f.text_field :name, class: 'form-control' %>         </div>         <div class="form-group">           <%= f.label :email %>           <%= f.email_field :email, class: 'form-control' %>         </div>         <div class="form-group">           <%= f.label :comments %>           <%= f.text_area :comments, class: 'form-control' %>         </div>         <%= f.submit 'submit', class: 'btn btn-default' %>       <% end %>     </div>   </div> </div> 

i getting nomethoderror in contacts#new

stack trace

activemodel (4.1.0) lib/active_model/attribute_methods.rb:435:in `method_missing' activerecord (4.1.0) lib/active_record/attribute_methods.rb:206:in `method_missing' actionview (4.1.0) lib/action_view/helpers/tags/base.rb:28:in `value' actionview (4.1.0) lib/action_view/helpers/tags/base.rb:37:in `value_before_type_cast' actionview (4.1.0) lib/action_view/helpers/tags/text_field.rb:9:in `block in render' actionview (4.1.0) lib/action_view/helpers/tags/text_field.rb:9:in `fetch' actionview (4.1.0) lib/action_view/helpers/tags/text_field.rb:9:in `render' actionview (4.1.0) lib/action_view/helpers/form_helper.rb:771:in `text_field' actionview (4.1.0) lib/action_view/helpers/form_helper.rb:1258:in `text_field' app/views/contacts/new.html.erb:4:in `block in _app_views_contacts_new_html_erb__916588012054069058_69974500316060' actionview (4.1.0) lib/action_view/helpers/capture_helper.rb:38:in `block in capture' actionview (4.1.0) lib/action_view/helpers/capture_helper.rb:200:in `with_output_buffer' actionview (4.1.0) lib/action_view/helpers/capture_helper.rb:38:in `capture' actionview (4.1.0) lib/action_view/helpers/form_helper.rb:434:in `form_for' app/views/contacts/new.html.erb:2:in `_app_views_contacts_new_html_erb__916588012054069058_69974500316060' actionview (4.1.0) lib/action_view/template.rb:145:in `block in render' activesupport (4.1.0) lib/active_support/notifications.rb:161:in `instrument' actionview (4.1.0) lib/action_view/template.rb:339:in `instrument' actionview (4.1.0) lib/action_view/template.rb:143:in `render' actionview (4.1.0) lib/action_view/renderer/template_renderer.rb:55:in `block (2 levels) in render_template' actionview (4.1.0) lib/action_view/renderer/abstract_renderer.rb:38:in `block in instrument' activesupport (4.1.0) lib/active_support/notifications.rb:159:in `block in instrument' activesupport (4.1.0) lib/active_support/notifications/instrumenter.rb:20:in `instrument' activesupport (4.1.0) lib/active_support/notifications.rb:159:in `instrument' actionview (4.1.0) lib/action_view/renderer/abstract_renderer.rb:38:in `instrument' actionview (4.1.0) lib/action_view/renderer/template_renderer.rb:54:in `block in render_template' actionview (4.1.0) lib/action_view/renderer/template_renderer.rb:62:in `render_with_layout' actionview (4.1.0) lib/action_view/renderer/template_renderer.rb:53:in `render_template' actionview (4.1.0) lib/action_view/renderer/template_renderer.rb:17:in `render' actionview (4.1.0) lib/action_view/renderer/renderer.rb:42:in `render_template' actionview (4.1.0) lib/action_view/renderer/renderer.rb:23:in `render' actionview (4.1.0) lib/action_view/rendering.rb:99:in `_render_template' actionpack (4.1.0) lib/action_controller/metal/streaming.rb:217:in `_render_template' actionview (4.1.0) lib/action_view/rendering.rb:82:in `render_to_body' actionpack (4.1.0) lib/action_controller/metal/rendering.rb:32:in `render_to_body' actionpack (4.1.0) lib/action_controller/metal/renderers.rb:32:in `render_to_body' actionpack (4.1.0) lib/abstract_controller/rendering.rb:25:in `render' actionpack (4.1.0) lib/action_controller/metal/rendering.rb:16:in `render' actionpack (4.1.0) lib/action_controller/metal/instrumentation.rb:41:in `block (2 levels) in render' activesupport (4.1.0) lib/active_support/core_ext/benchmark.rb:12:in `block in ms' /home/action/.parts/packages/ruby2.1/2.1.1/lib/ruby/2.1.0/benchmark.rb:294:in `realtime' activesupport (4.1.0) lib/active_support/core_ext/benchmark.rb:12:in `ms' actionpack (4.1.0) lib/action_controller/metal/instrumentation.rb:41:in `block in render' actionpack (4.1.0) lib/action_controller/metal/instrumentation.rb:84:in `cleanup_view_runtime' activerecord (4.1.0) lib/active_record/railties/controller_runtime.rb:25:in `cleanup_view_runtime' actionpack (4.1.0) lib/action_controller/metal/instrumentation.rb:40:in `render' actionpack (4.1.0) lib/action_controller/metal/implicit_render.rb:10:in `default_render' actionpack (4.1.0) lib/action_controller/metal/implicit_render.rb:5:in `send_action' actionpack (4.1.0) lib/abstract_controller/base.rb:189:in `process_action' actionpack (4.1.0) lib/action_controller/metal/rendering.rb:10:in `process_action' actionpack (4.1.0) lib/abstract_controller/callbacks.rb:20:in `block in process_action' activesupport (4.1.0) lib/active_support/callbacks.rb:113:in `call' activesupport (4.1.0) lib/active_support/callbacks.rb:113:in `call' activesupport (4.1.0) lib/active_support/callbacks.rb:229:in `block in halting' activesupport (4.1.0) lib/active_support/callbacks.rb:229:in `call' activesupport (4.1.0) lib/active_support/callbacks.rb:229:in `block in halting' activesupport (4.1.0) lib/active_support/callbacks.rb:166:in `call' activesupport (4.1.0) lib/active_support/callbacks.rb:166:in `block in halting' activesupport (4.1.0) lib/active_support/callbacks.rb:166:in `call' activesupport (4.1.0) lib/active_support/callbacks.rb:166:in `block in halting' activesupport (4.1.0) lib/active_support/callbacks.rb:166:in `call' activesupport (4.1.0) lib/active_support/callbacks.rb:166:in `block in halting' activesupport (4.1.0) lib/active_support/callbacks.rb:86:in `call' activesupport (4.1.0) lib/active_support/callbacks.rb:86:in `run_callbacks' actionpack (4.1.0) lib/abstract_controller/callbacks.rb:19:in `process_action' actionpack (4.1.0) lib/action_controller/metal/rescue.rb:29:in `process_action' actionpack (4.1.0) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action' activesupport (4.1.0) lib/active_support/notifications.rb:159:in `block in instrument' activesupport (4.1.0) lib/active_support/notifications/instrumenter.rb:20:in `instrument' activesupport (4.1.0) lib/active_support/notifications.rb:159:in `instrument' actionpack (4.1.0) lib/action_controller/metal/instrumentation.rb:30:in `process_action' actionpack (4.1.0) lib/action_controller/metal/params_wrapper.rb:250:in `process_action' activerecord (4.1.0) lib/active_record/railties/controller_runtime.rb:18:in `process_action' actionpack (4.1.0) lib/abstract_controller/base.rb:136:in `process' actionview (4.1.0) lib/action_view/rendering.rb:30:in `process' actionpack (4.1.0) lib/action_controller/metal.rb:195:in `dispatch' actionpack (4.1.0) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' actionpack (4.1.0) lib/action_controller/metal.rb:231:in `block in action' actionpack (4.1.0) lib/action_dispatch/routing/route_set.rb:80:in `call' actionpack (4.1.0) lib/action_dispatch/routing/route_set.rb:80:in `dispatch' actionpack (4.1.0) lib/action_dispatch/routing/route_set.rb:48:in `call' actionpack (4.1.0) lib/action_dispatch/journey/router.rb:71:in `block in call' actionpack (4.1.0) lib/action_dispatch/journey/router.rb:59:in `each' actionpack (4.1.0) lib/action_dispatch/journey/router.rb:59:in `call' actionpack (4.1.0) lib/action_dispatch/routing/route_set.rb:676:in `call' rack (1.5.5) lib/rack/etag.rb:23:in `call' rack (1.5.5) lib/rack/conditionalget.rb:25:in `call' rack (1.5.5) lib/rack/head.rb:11:in `call' actionpack (4.1.0) lib/action_dispatch/middleware/params_parser.rb:27:in `call' actionpack (4.1.0) lib/action_dispatch/middleware/flash.rb:254:in `call' rack (1.5.5) lib/rack/session/abstract/id.rb:225:in `context' rack (1.5.5) lib/rack/session/abstract/id.rb:220:in `call' actionpack (4.1.0) lib/action_dispatch/middleware/cookies.rb:560:in `call' activerecord (4.1.0) lib/active_record/query_cache.rb:36:in `call' activerecord (4.1.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:621:in `call' activerecord (4.1.0) lib/active_record/migration.rb:380:in `call' actionpack (4.1.0) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' activesupport (4.1.0) lib/active_support/callbacks.rb:82:in `run_callbacks' actionpack (4.1.0) lib/action_dispatch/middleware/callbacks.rb:27:in `call' actionpack (4.1.0) lib/action_dispatch/middleware/reloader.rb:73:in `call' actionpack (4.1.0) lib/action_dispatch/middleware/remote_ip.rb:76:in `call' actionpack (4.1.0) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' actionpack (4.1.0) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' railties (4.1.0) lib/rails/rack/logger.rb:38:in `call_app' railties (4.1.0) lib/rails/rack/logger.rb:20:in `block in call' activesupport (4.1.0) lib/active_support/tagged_logging.rb:68:in `block in tagged' activesupport (4.1.0) lib/active_support/tagged_logging.rb:26:in `tagged' activesupport (4.1.0) lib/active_support/tagged_logging.rb:68:in `tagged' railties (4.1.0) lib/rails/rack/logger.rb:20:in `call' actionpack (4.1.0) lib/action_dispatch/middleware/request_id.rb:21:in `call' rack (1.5.5) lib/rack/methodoverride.rb:21:in `call' rack (1.5.5) lib/rack/runtime.rb:17:in `call' activesupport (4.1.0) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call' rack (1.5.5) lib/rack/lock.rb:17:in `call' actionpack (4.1.0) lib/action_dispatch/middleware/static.rb:64:in `call' rack (1.5.5) lib/rack/sendfile.rb:112:in `call' railties (4.1.0) lib/rails/engine.rb:514:in `call' railties (4.1.0) lib/rails/application.rb:144:in `call' rack (1.5.5) lib/rack/lock.rb:17:in `call' rack (1.5.5) lib/rack/content_length.rb:14:in `call' rack (1.5.5) lib/rack/handler/webrick.rb:60:in `service' /home/action/.parts/packages/ruby2.1/2.1.1/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service' /home/action/.parts/packages/ruby2.1/2.1.1/lib/ruby/2.1.0/webrick/httpserver.rb:94:in `run' /home/action/.parts/packages/ruby2.1/2.1.1/lib/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread' 

try , see if works...

<%= form_for contact.new |f| %>

however, please add contacts_controller.rb code. have feeling didn't specify new, show , create actions there.