我只想拥有编辑类属性的能力,而不是ActiveRecord类的继承者.
这是我的类/app/model/entry.rb：
class Entry attr_accessor :title,:body end
这是一个控制器：
class DiaryController < ApplicationController
def new
@entry = Entry.new
end
end
这是一个观点：
<%= form_for(@entry) do |f| %> <%= f.text_field :title %> <br /> <%= f.text_area :body %> <br /> <% end %>
我在打开表单时收到错误消息：
undefined method `model_name’ for Entry:Class
这是完整的堆栈：
Extracted source (around line #1): 1: <%= form_for(@entry) do |f| %> 2: <%= f.text_field :title %> <br /> 3: <%= f.text_area :body %> <br /> 4: <% end %> Full trace: activemodel (3.0.6) lib/active_model/naming.rb:95:in `model_name_from_record_or_class' activemodel (3.0.6) lib/active_model/naming.rb:82:in `singular' actionpack (3.0.6) lib/action_view/helpers/form_helper.rb:312:in `form_for' app/views/diary/new.html.erb:1:in `_app_views_diary_new_html_erb___902027577_26033568_187052521' actionpack (3.0.6) lib/action_view/template.rb:135:in `block in render' activesupport (3.0.6) lib/active_support/notifications.rb:54:in `instrument' actionpack (3.0.6) lib/action_view/template.rb:127:in `render' actionpack (3.0.6) lib/action_view/render/rendering.rb:59:in `block in _render_template' activesupport (3.0.6) lib/active_support/notifications.rb:52:in `block in instrument' activesupport (3.0.6) lib/active_support/notifications/instrumenter.rb:21:in `instrument' activesupport (3.0.6) lib/active_support/notifications.rb:52:in `instrument' actionpack (3.0.6) lib/action_view/render/rendering.rb:56:in `_render_template' actionpack (3.0.6) lib/action_view/render/rendering.rb:26:in `render' actionpack (3.0.6) lib/abstract_controller/rendering.rb:115:in `_render_template' actionpack (3.0.6) lib/abstract_controller/rendering.rb:109:in `render_to_body' actionpack (3.0.6) lib/action_controller/Metal/renderers.rb:47:in `render_to_body' actionpack (3.0.6) lib/action_controller/Metal/compatibility.rb:55:in `render_to_body' actionpack (3.0.6) lib/abstract_controller/rendering.rb:102:in `render_to_string' actionpack (3.0.6) lib/abstract_controller/rendering.rb:93:in `render' actionpack (3.0.6) lib/action_controller/Metal/rendering.rb:17:in `render' actionpack (3.0.6) lib/action_controller/Metal/instrumentation.rb:40:in `block (2 levels) in render' activesupport (3.0.6) lib/active_support/core_ext/benchmark.rb:5:in `block in ms' c:/Ruby192/lib/ruby/1.9.1/benchmark.rb:309:in `realtime' activesupport (3.0.6) lib/active_support/core_ext/benchmark.rb:5:in `ms' actionpack (3.0.6) lib/action_controller/Metal/instrumentation.rb:40:in `block in render' actionpack (3.0.6) lib/action_controller/Metal/instrumentation.rb:78:in `cleanup_view_runtime' activerecord (3.0.6) lib/active_record/railties/controller_runtime.rb:15:in `cleanup_view_runtime' actionpack (3.0.6) lib/action_controller/Metal/instrumentation.rb:39:in `render' actionpack (3.0.6) lib/action_controller/Metal/implicit_render.rb:10:in `default_render' actionpack (3.0.6) lib/action_controller/Metal/implicit_render.rb:5:in `send_action' actionpack (3.0.6) lib/abstract_controller/base.rb:150:in `process_action' actionpack (3.0.6) lib/action_controller/Metal/rendering.rb:11:in `process_action' actionpack (3.0.6) lib/abstract_controller/callbacks.rb:18:in `block in process_action' activesupport (3.0.6) lib/active_support/callbacks.rb:436:in `_run__776311234__process_action__123531476__callbacks' activesupport (3.0.6) lib/active_support/callbacks.rb:410:in `_run_process_action_callbacks' activesupport (3.0.6) lib/active_support/callbacks.rb:94:in `run_callbacks' actionpack (3.0.6) lib/abstract_controller/callbacks.rb:17:in `process_action' actionpack (3.0.6) lib/action_controller/Metal/instrumentation.rb:30:in `block in process_action' activesupport (3.0.6) lib/active_support/notifications.rb:52:in `block in instrument' activesupport (3.0.6) lib/active_support/notifications/instrumenter.rb:21:in `instrument' activesupport (3.0.6) lib/active_support/notifications.rb:52:in `instrument' actionpack (3.0.6) lib/action_controller/Metal/instrumentation.rb:29:in `process_action' actionpack (3.0.6) lib/action_controller/Metal/rescue.rb:17:in `process_action' actionpack (3.0.6) lib/abstract_controller/base.rb:119:in `process' actionpack (3.0.6) lib/abstract_controller/rendering.rb:41:in `process' actionpack (3.0.6) lib/action_controller/Metal.rb:138:in `dispatch' actionpack (3.0.6) lib/action_controller/Metal/rack_delegation.rb:14:in `dispatch' actionpack (3.0.6) lib/action_controller/Metal.rb:178:in `block in action' actionpack (3.0.6) lib/action_dispatch/routing/route_set.rb:62:in `call' actionpack (3.0.6) lib/action_dispatch/routing/route_set.rb:62:in `dispatch' actionpack (3.0.6) lib/action_dispatch/routing/route_set.rb:27:in `call' rack-mount (0.6.14) lib/rack/mount/route_set.rb:148:in `block in call' rack-mount (0.6.14) lib/rack/mount/code_generation.rb:93:in `block in recognize' rack-mount (0.6.14) lib/rack/mount/code_generation.rb:68:in `optimized_each' rack-mount (0.6.14) lib/rack/mount/code_generation.rb:92:in `recognize' rack-mount (0.6.14) lib/rack/mount/route_set.rb:139:in `call' actionpack (3.0.6) lib/action_dispatch/routing/route_set.rb:493:in `call' actionpack (3.0.6) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' actionpack (3.0.6) lib/action_dispatch/middleware/head.rb:14:in `call' rack (1.2.2) lib/rack/methodoverride.rb:24:in `call' actionpack (3.0.6) lib/action_dispatch/middleware/params_parser.rb:21:in `call' actionpack (3.0.6) lib/action_dispatch/middleware/flash.rb:182:in `call' actionpack (3.0.6) lib/action_dispatch/middleware/session/abstract_store.rb:149:in `call' actionpack (3.0.6) lib/action_dispatch/middleware/cookies.rb:302:in `call' activerecord (3.0.6) lib/active_record/query_cache.rb:32:in `block in call' activerecord (3.0.6) lib/active_record/connection_adapters/abstract/query_cache.rb:28:in `cache' activerecord (3.0.6) lib/active_record/query_cache.rb:12:in `cache' activerecord (3.0.6) lib/active_record/query_cache.rb:31:in `call' activerecord (3.0.6) lib/active_record/connection_adapters/abstract/connection_pool.rb:354:in `call' actionpack (3.0.6) lib/action_dispatch/middleware/callbacks.rb:46:in `block in call' activesupport (3.0.6) lib/active_support/callbacks.rb:416:in `_run_call_callbacks' actionpack (3.0.6) lib/action_dispatch/middleware/callbacks.rb:44:in `call' rack (1.2.2) lib/rack/sendfile.rb:107:in `call' actionpack (3.0.6) lib/action_dispatch/middleware/remote_ip.rb:48:in `call' actionpack (3.0.6) lib/action_dispatch/middleware/show_exceptions.rb:47:in `call' railties (3.0.6) lib/rails/rack/logger.rb:13:in `call' rack (1.2.2) lib/rack/runtime.rb:17:in `call' activesupport (3.0.6) lib/active_support/cache/strategy/local_cache.rb:72:in `call' rack (1.2.2) lib/rack/lock.rb:11:in `block in call' <internal:prelude>:10:in `synchronize' rack (1.2.2) lib/rack/lock.rb:11:in `call' actionpack (3.0.6) lib/action_dispatch/middleware/static.rb:30:in `call' railties (3.0.6) lib/rails/application.rb:168:in `call' railties (3.0.6) lib/rails/application.rb:77:in `method_missing' railties (3.0.6) lib/rails/rack/log_tailer.rb:14:in `call' rack (1.2.2) lib/rack/content_length.rb:13:in `call' rack (1.2.2) lib/rack/handler/webrick.rb:52:in `service' c:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service' c:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run' c:/Ruby192/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'
是否可以使用form_for-tag编辑类属性？