Rspec-capybara :: ElementNotFound：无法找到字段“名称”
[英]Rspec - capybara::ElementNotFound:Unable to find field “name”
问题描述
So I am having a bit of a struggle with the rspec errors I am getting. 
因此，我在遇到的rspec错误方面有些挣扎。 I have a column in my database for name, so I am not sure why that wouldn't work... The error reads- 我的数据库中有一个名称列，所以我不确定为什么这行不通...错误显示为-
failures:
1) Sammiches GET /sammiches creates a new sammich
Failure/Error: fill_in 'name', :with => 'lechuga'
Capybara::ElementNotFound:
Unable to find field "name"
# ./spec/requests/sammiches_spec.rb:13:in `block (3 levels) in <top (required)>'
Failure with line non commented out. 行未注释掉失败。
1) Sammiches GET /sammiches creates a new sammich
Failure/Error: visit sammiches_path
ActionView::Template::Error:
undefined method `sammich' for #<Sammich:0x007ff33b5594f8>
spec file - 规格文件-
require 'spec_helper'
describe "Sammiches" do
describe "GET /sammiches" do
it "display some sammiches" do
@sammich = Sammich.create :name => 'bacon'
visit sammiches_path
page.should have_content 'bacon'
end
it "creates a new sammich" do
visit sammiches_path
fill_in 'name', :with => 'lechuga'
click_button 'create Sammich'
current_path.should = sammich_path
page.should have_content 'BLT'
save_and_open_page
end
end
end
My view look like. 我的观点看起来像。 The strange thing is it only "works" if I get rid of that commented part. 奇怪的是，如果我删除了该注释部分，它只会“起作用”。 Any help on that would be great as well- 在这方面的任何帮助也将非常棒-
<h1>All my Sammiches</h1>
<%= form_for Sammich.new do |f| %>
<%= f.label :sammich %>
#<%= f.text_field :sammich %>#
<%= f.submit %>
<% end %>
<ul>
<% for sammich in @sammiches %>
<li><%= sammich.name %></li>
<% end %>
</ul>
Thanks! 谢谢！
page source 页面源
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Action Controller: Exception caught</title>
<style>
body { background-color: #fff; color: #333; }
body, p, ol, ul, td {
font-family: helvetica, verdana, arial, sans-serif;
font-size: 13px;
line-height: 18px;
}
pre {
background-color: #eee;
padding: 10px;
font-size: 11px;
white-space: pre-wrap;
}
a { color: #000; }
a:visited { color: #666; }
a:hover { color: #fff; background-color:#000; }
</style>
</head>
<body>
<h1>
NoMethodError in
Sammiches#index
</h1>
<p>
Showing <i>/Users/Cameron/sammy/sammiches/app/views/sammiches/index.html.erb</i> where line <b>#4</b> raised:
<pre><code>undefined method `sammich' for #<Sammich:0x007fac4169d300></code></pre>
</p>
<p>Extracted source (around line <b>#4</b>):
<pre><code>1: <h1>All my Sammiches</h1>
2: <%= form_for Sammich.new do |f| %>
3: <%= f.label :sammich %>
4: <%= f.text_field :sammich %>
5: <%= f.submit %>
6: <% end %>
7: <ul>
</code></pre></p>
<p></p>
<p><code>Rails.root: /Users/Cameron/sammy/sammiches</code></p>
<div id="traces">
<a href="#" onclick="document.getElementById('Framework-Trace').style.display='none';document.getElementById('Full-Trace').style.display='none';document.getElementById('Application-Trace').style.display='block';; return false;">Application Trace</a> |
<a href="#" onclick="document.getElementById('Application-Trace').style.display='none';document.getElementById('Full-Trace').style.display='none';document.getElementById('Framework-Trace').style.display='block';; return false;">Framework Trace</a> |
<a href="#" onclick="document.getElementById('Application-Trace').style.display='none';document.getElementById('Framework-Trace').style.display='none';document.getElementById('Full-Trace').style.display='block';; return false;">Full Trace</a>
<div id="Application-Trace" style="display: block;">
<pre><code>app/views/sammiches/index.html.erb:4:in `block in _app_views_sammiches_index_html_erb__208297745638609695_70188865290640'
app/views/sammiches/index.html.erb:2:in `_app_views_sammiches_index_html_erb__208297745638609695_70188865290640'</code></pre>
</div>
<div id="Framework-Trace" style="display: none;">
<pre><code>activemodel (3.2.13) lib/active_model/attribute_methods.rb:407:in `method_missing'
activerecord (3.2.13) lib/active_record/attribute_methods.rb:149:in `method_missing'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1159:in `value_before_type_cast'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1147:in `value_before_type_cast'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1041:in `block in to_input_field_tag'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1041:in `fetch'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1041:in `to_input_field_tag'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:690:in `text_field'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1284:in `text_field'
actionpack (3.2.13) lib/action_view/helpers/capture_helper.rb:40:in `block in capture'
actionpack (3.2.13) lib/action_view/helpers/capture_helper.rb:187:in `with_output_buffer'
actionpack (3.2.13) lib/action_view/helpers/capture_helper.rb:40:in `capture'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:378:in `form_for'
actionpack (3.2.13) lib/action_view/template.rb:145:in `block in render'
activesupport (3.2.13) lib/active_support/notifications.rb:125:in `instrument'
actionpack (3.2.13) lib/action_view/template.rb:143:in `render'
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:47:in `block (2 levels) in render_template'
actionpack (3.2.13) lib/action_view/renderer/abstract_renderer.rb:38:in `block in instrument'
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `block in instrument'
activesupport (3.2.13) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.13) lib/action_view/renderer/abstract_renderer.rb:38:in `instrument'
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:46:in `block in render_template'
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:54:in `render_with_layout'
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:45:in `render_template'
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:18:in `render'
actionpack (3.2.13) lib/action_view/renderer/renderer.rb:36:in `render_template'
actionpack (3.2.13) lib/action_view/renderer/renderer.rb:17:in `render'
actionpack (3.2.13) lib/abstract_controller/rendering.rb:110:in `_render_template'
actionpack (3.2.13) lib/action_controller/metal/streaming.rb:225:in `_render_template'
actionpack (3.2.13) lib/abstract_controller/rendering.rb:103:in `render_to_body'
actionpack (3.2.13) lib/action_controller/metal/renderers.rb:28:in `render_to_body'
actionpack (3.2.13) lib/action_controller/metal/compatibility.rb:50:in `render_to_body'
actionpack (3.2.13) lib/abstract_controller/rendering.rb:88:in `render'
actionpack (3.2.13) lib/action_controller/metal/rendering.rb:16:in `render'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:40:in `block (2 levels) in render'
activesupport (3.2.13) lib/active_support/core_ext/benchmark.rb:5:in `block in ms'
/Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
activesupport (3.2.13) lib/active_support/core_ext/benchmark.rb:5:in `ms'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:40:in `block in render'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:83:in `cleanup_view_runtime'
activerecord (3.2.13) lib/active_record/railties/controller_runtime.rb:24:in `cleanup_view_runtime'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:39:in `render'
actionpack (3.2.13) lib/action_controller/metal/implicit_render.rb:10:in `default_render'
actionpack (3.2.13) lib/action_controller/metal/implicit_render.rb:5:in `send_action'
actionpack (3.2.13) lib/abstract_controller/base.rb:167:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (3.2.13) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
activesupport (3.2.13) lib/active_support/callbacks.rb:414:in `_run__3460368674634880969__process_action__2573647100002742481__callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.13) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.13) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `block in instrument'
activesupport (3.2.13) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
activerecord (3.2.13) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (3.2.13) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.2.13) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.2.13) lib/action_controller/metal.rb:203:in `dispatch'
actionpack (3.2.13) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
actionpack (3.2.13) lib/action_controller/metal.rb:246:in `block in action'
actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:73:in `call'
actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
actionpack (3.2.13) 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 (3.2.13) lib/action_dispatch/routing/route_set.rb:612:in `call'
actionpack (3.2.13) 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 (3.2.13) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.2.13) 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 (3.2.13) lib/action_dispatch/middleware/cookies.rb:341:in `call'
activerecord (3.2.13) lib/active_record/query_cache.rb:64:in `call'
activerecord (3.2.13) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `_run__2328833785069737987__call__85209834340556796__callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.13) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/reloader.rb:65:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.13) lib/rails/rack/logger.rb:32:in `call_app'
railties (3.2.13) lib/rails/rack/logger.rb:16:in `block in call'
activesupport (3.2.13) lib/active_support/tagged_logging.rb:22:in `tagged'
railties (3.2.13) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.13) 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 (3.2.13) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.5) lib/rack/lock.rb:15:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/static.rb:63:in `call'
railties (3.2.13) lib/rails/engine.rb:479:in `call'
railties (3.2.13) lib/rails/application.rb:223:in `call'
rack (1.4.5) lib/rack/content_length.rb:14:in `call'
railties (3.2.13) lib/rails/rack/log_tailer.rb:17:in `call'
rack (1.4.5) lib/rack/handler/webrick.rb:59:in `service'
/Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
/Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
/Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'</code></pre>
</div>
<div id="Full-Trace" style="display: none;">
<pre><code>activemodel (3.2.13) lib/active_model/attribute_methods.rb:407:in `method_missing'
activerecord (3.2.13) lib/active_record/attribute_methods.rb:149:in `method_missing'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1159:in `value_before_type_cast'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1147:in `value_before_type_cast'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1041:in `block in to_input_field_tag'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1041:in `fetch'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1041:in `to_input_field_tag'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:690:in `text_field'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1284:in `text_field'
app/views/sammiches/index.html.erb:4:in `block in _app_views_sammiches_index_html_erb__208297745638609695_70188865290640'
actionpack (3.2.13) lib/action_view/helpers/capture_helper.rb:40:in `block in capture'
actionpack (3.2.13) lib/action_view/helpers/capture_helper.rb:187:in `with_output_buffer'
actionpack (3.2.13) lib/action_view/helpers/capture_helper.rb:40:in `capture'
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:378:in `form_for'
app/views/sammiches/index.html.erb:2:in `_app_views_sammiches_index_html_erb__208297745638609695_70188865290640'
actionpack (3.2.13) lib/action_view/template.rb:145:in `block in render'
activesupport (3.2.13) lib/active_support/notifications.rb:125:in `instrument'
actionpack (3.2.13) lib/action_view/template.rb:143:in `render'
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:47:in `block (2 levels) in render_template'
actionpack (3.2.13) lib/action_view/renderer/abstract_renderer.rb:38:in `block in instrument'
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `block in instrument'
activesupport (3.2.13) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.13) lib/action_view/renderer/abstract_renderer.rb:38:in `instrument'
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:46:in `block in render_template'
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:54:in `render_with_layout'
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:45:in `render_template'
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:18:in `render'
actionpack (3.2.13) lib/action_view/renderer/renderer.rb:36:in `render_template'
actionpack (3.2.13) lib/action_view/renderer/renderer.rb:17:in `render'
actionpack (3.2.13) lib/abstract_controller/rendering.rb:110:in `_render_template'
actionpack (3.2.13) lib/action_controller/metal/streaming.rb:225:in `_render_template'
actionpack (3.2.13) lib/abstract_controller/rendering.rb:103:in `render_to_body'
actionpack (3.2.13) lib/action_controller/metal/renderers.rb:28:in `render_to_body'
actionpack (3.2.13) lib/action_controller/metal/compatibility.rb:50:in `render_to_body'
actionpack (3.2.13) lib/abstract_controller/rendering.rb:88:in `render'
actionpack (3.2.13) lib/action_controller/metal/rendering.rb:16:in `render'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:40:in `block (2 levels) in render'
activesupport (3.2.13) lib/active_support/core_ext/benchmark.rb:5:in `block in ms'
/Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
activesupport (3.2.13) lib/active_support/core_ext/benchmark.rb:5:in `ms'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:40:in `block in render'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:83:in `cleanup_view_runtime'
activerecord (3.2.13) lib/active_record/railties/controller_runtime.rb:24:in `cleanup_view_runtime'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:39:in `render'
actionpack (3.2.13) lib/action_controller/metal/implicit_render.rb:10:in `default_render'
actionpack (3.2.13) lib/action_controller/metal/implicit_render.rb:5:in `send_action'
actionpack (3.2.13) lib/abstract_controller/base.rb:167:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (3.2.13) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
activesupport (3.2.13) lib/active_support/callbacks.rb:414:in `_run__3460368674634880969__process_action__2573647100002742481__callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.13) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.13) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `block in instrument'
activesupport (3.2.13) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
activerecord (3.2.13) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (3.2.13) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.2.13) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.2.13) lib/action_controller/metal.rb:203:in `dispatch'
actionpack (3.2.13) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
actionpack (3.2.13) lib/action_controller/metal.rb:246:in `block in action'
actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:73:in `call'
actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
actionpack (3.2.13) 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 (3.2.13) lib/action_dispatch/routing/route_set.rb:612:in `call'
actionpack (3.2.13) 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 (3.2.13) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.2.13) 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 (3.2.13) lib/action_dispatch/middleware/cookies.rb:341:in `call'
activerecord (3.2.13) lib/active_record/query_cache.rb:64:in `call'
activerecord (3.2.13) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `_run__2328833785069737987__call__85209834340556796__callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.13) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/reloader.rb:65:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.13) lib/rails/rack/logger.rb:32:in `call_app'
railties (3.2.13) lib/rails/rack/logger.rb:16:in `block in call'
activesupport (3.2.13) lib/active_support/tagged_logging.rb:22:in `tagged'
railties (3.2.13) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.13) 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 (3.2.13) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.5) lib/rack/lock.rb:15:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/static.rb:63:in `call'
railties (3.2.13) lib/rails/engine.rb:479:in `call'
railties (3.2.13) lib/rails/application.rb:223:in `call'
rack (1.4.5) lib/rack/content_length.rb:14:in `call'
railties (3.2.13) lib/rails/rack/log_tailer.rb:17:in `call'
rack (1.4.5) lib/rack/handler/webrick.rb:59:in `service'
/Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
/Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
/Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'</code></pre>
</div>
</div>
<h2 style="margin-top: 30px">Request</h2>
<p><b>Parameters</b>: <pre>None</pre></p>
<p><a href="#" onclick="document.getElementById('session_dump').style.display='block'; return false;">Show session dump</a></p>
<div id="session_dump" style="display:none"><pre>_csrf_token: "wsS7/d0sPVMEvPA2DIO1uJgLEhwH38/ckvq14iZZoxw="
session_id: "a72797cacd094ecd4b6e57ece26e1ef2"</pre></div>
<p><a href="#" onclick="document.getElementById('env_dump').style.display='block'; return false;">Show env dump</a></p>
<div id="env_dump" style="display:none"><pre>GATEWAY_INTERFACE: "CGI/1.1"
HTTP_ACCEPT: "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
HTTP_ACCEPT_CHARSET: "ISO-8859-1,utf-8;q=0.7,*;q=0.3"
HTTP_ACCEPT_ENCODING: "gzip,deflate,sdch"
HTTP_ACCEPT_LANGUAGE: "en-US,en;q=0.8"
HTTP_CACHE_CONTROL: "max-age=0"
REMOTE_ADDR: "127.0.0.1"
REMOTE_HOST: "localhost"
SERVER_NAME: "localhost"
SERVER_PROTOCOL: "HTTP/1.1"</pre></div>
<h2 style="margin-top: 30px">Response</h2>
<p><b>Headers</b>: <pre>None</pre></p>
</body>
</html>
1 个解决方案
解决方案1
2 已采纳 2013-04-29 01:08:19
I might get downvoted for this but it's difficult to explain on a comment. 我可能对此不满意，但很难在评论中解释。 There is absolutely no need to do 绝对没有必要做
<% for sammich in @sammiches %>
<li><%= sammich.name %></li>
<% end %>
Instead you should do 相反，你应该做
<% @sammiches.each do |sammich| %>
<li><%= sammich.name %></li>
<% end %>
As for why your code isn't working, the form_for tag helps you fill in your attributes of your record, inserts it into parameters, and sends it to the create action. 至于为什么代码不起作用， form_for标记可帮助您填写记录的属性，将其插入参数中，然后将其发送到create动作。 But what really matters in your case is that you don't have an attribute named Sammich for the Sammich model. 但是，在您的情况下真正重要的是，对于Sammich模型，您没有名为Sammich的属性。 You do however have an attribute named name . 但是，您确实有一个名为name的属性。 So what do you do? 所以你会怎么做？
<%= form_for Sammich.new do |f| %>
<%= f.label :sammich %>
<%= f.text_field :name %>
<%= f.submit %>
<% end %>
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