ruby-on-rails - Rspec - capybara::ElementNotFound: 无法找到字段“名称”

Question

因此，我遇到了一些 rspec 错误。我的数据库中有一个名称列，所以我不确定为什么这不起作用......错误读取 -

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)>'

未注释掉的行失败。

1) Sammiches GET /sammiches creates a new sammich
 Failure/Error: visit sammiches_path
 ActionView::Template::Error:
   undefined method `sammich' for #<Sammich:0x007ff33b5594f8>

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

我的看法是这样的。奇怪的是，如果我去掉那个评论部分，它只会“起作用”。对此的任何帮助也会很棒-

<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>

谢谢！

页面来源

<!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&#x27; for #&lt;Sammich:0x007fac4169d300&gt;</code></pre>
</p>

<p>Extracted source (around line <b>#4</b>):
<pre><code>1: &lt;h1&gt;All my Sammiches&lt;/h1&gt;
2: &lt;%= form_for Sammich.new do |f| %&gt;
3: &lt;%= f.label :sammich %&gt;
4: &lt;%= f.text_field :sammich %&gt;
5: &lt;%= f.submit %&gt;
6: &lt;% end %&gt;
7: &lt;ul&gt;
</code></pre></p>

<p></p>


<p><code>Rails.root: /Users/Cameron/sammy/sammiches</code></p>

<div id="traces">
    <a href="#" onclick="document.getElementById(&#x27;Framework-Trace&#x27;).style.display=&#x27;none&#x27;;document.getElementById(&#x27;Full-Trace&#x27;).style.display=&#x27;none&#x27;;document.getElementById(&#x27;Application-Trace&#x27;).style.display=&#x27;block&#x27;;; return false;">Application Trace</a> |
    <a href="#" onclick="document.getElementById(&#x27;Application-Trace&#x27;).style.display=&#x27;none&#x27;;document.getElementById(&#x27;Full-Trace&#x27;).style.display=&#x27;none&#x27;;document.getElementById(&#x27;Framework-Trace&#x27;).style.display=&#x27;block&#x27;;; return false;">Framework Trace</a> |
    <a href="#" onclick="document.getElementById(&#x27;Application-Trace&#x27;).style.display=&#x27;none&#x27;;document.getElementById(&#x27;Framework-Trace&#x27;).style.display=&#x27;none&#x27;;document.getElementById(&#x27;Full-Trace&#x27;).style.display=&#x27;block&#x27;;; 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&#x27;
app/views/sammiches/index.html.erb:2:in `_app_views_sammiches_index_html_erb__208297745638609695_70188865290640&#x27;</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&#x27;
activerecord (3.2.13) lib/active_record/attribute_methods.rb:149:in `method_missing&#x27;
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actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1041:in `fetch&#x27;
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1041:in `to_input_field_tag&#x27;
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:690:in `text_field&#x27;
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activesupport (3.2.13) lib/active_support/core_ext/benchmark.rb:5:in `ms&#x27;
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/Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run&#x27;
/Users/Cameron/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread&#x27;</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&#x27;
activerecord (3.2.13) lib/active_record/attribute_methods.rb:149:in `method_missing&#x27;
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1159:in `value_before_type_cast&#x27;
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1147:in `value_before_type_cast&#x27;
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1041:in `block in to_input_field_tag&#x27;
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1041:in `fetch&#x27;
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1041:in `to_input_field_tag&#x27;
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:690:in `text_field&#x27;
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:1284:in `text_field&#x27;
app/views/sammiches/index.html.erb:4:in `block in _app_views_sammiches_index_html_erb__208297745638609695_70188865290640&#x27;
actionpack (3.2.13) lib/action_view/helpers/capture_helper.rb:40:in `block in capture&#x27;
actionpack (3.2.13) lib/action_view/helpers/capture_helper.rb:187:in `with_output_buffer&#x27;
actionpack (3.2.13) lib/action_view/helpers/capture_helper.rb:40:in `capture&#x27;
actionpack (3.2.13) lib/action_view/helpers/form_helper.rb:378:in `form_for&#x27;
app/views/sammiches/index.html.erb:2:in `_app_views_sammiches_index_html_erb__208297745638609695_70188865290640&#x27;
actionpack (3.2.13) lib/action_view/template.rb:145:in `block in render&#x27;
activesupport (3.2.13) lib/active_support/notifications.rb:125:in `instrument&#x27;
actionpack (3.2.13) lib/action_view/template.rb:143:in `render&#x27;
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:47:in `block (2 levels) in render_template&#x27;
actionpack (3.2.13) lib/action_view/renderer/abstract_renderer.rb:38:in `block in instrument&#x27;
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `block in instrument&#x27;
activesupport (3.2.13) lib/active_support/notifications/instrumenter.rb:20:in `instrument&#x27;
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `instrument&#x27;
actionpack (3.2.13) lib/action_view/renderer/abstract_renderer.rb:38:in `instrument&#x27;
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:46:in `block in render_template&#x27;
actionpack (3.2.13) lib/action_view/renderer/template_renderer.rb:54:in `render_with_layout&#x27;
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actionpack (3.2.13) lib/action_controller/metal/streaming.rb:225:in `_render_template&#x27;
actionpack (3.2.13) lib/abstract_controller/rendering.rb:103:in `render_to_body&#x27;
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actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:40:in `block (2 levels) in render&#x27;
activesupport (3.2.13) lib/active_support/core_ext/benchmark.rb:5:in `block in ms&#x27;
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actionpack (3.2.13) lib/action_controller/metal/implicit_render.rb:5:in `send_action&#x27;
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    </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: &quot;wsS7/d0sPVMEvPA2DIO1uJgLEhwH38/ckvq14iZZoxw=&quot;
session_id: &quot;a72797cacd094ecd4b6e57ece26e1ef2&quot;</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: &quot;CGI/1.1&quot;
HTTP_ACCEPT: &quot;text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8&quot;
HTTP_ACCEPT_CHARSET: &quot;ISO-8859-1,utf-8;q=0.7,*;q=0.3&quot;
HTTP_ACCEPT_ENCODING: &quot;gzip,deflate,sdch&quot;
HTTP_ACCEPT_LANGUAGE: &quot;en-US,en;q=0.8&quot;
HTTP_CACHE_CONTROL: &quot;max-age=0&quot;
REMOTE_ADDR: &quot;127.0.0.1&quot;
REMOTE_HOST: &quot;localhost&quot;
SERVER_NAME: &quot;localhost&quot;
SERVER_PROTOCOL: &quot;HTTP/1.1&quot;</pre></div>


<h2 style="margin-top: 30px">Response</h2>
<p><b>Headers</b>: <pre>None</pre></p>



</body>
</html>

score 2 · Accepted Answer

I might get downvoted for this but it's difficult to explain on a comment. There is absolutely no need to do

<% for sammich in @sammiches %>
  <li><%= sammich.name %></li>
<% end %>

Instead you should do

<% @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. But what really matters in your case is that you don't have an attribute named Sammich for the Sammich model. You do however have an attribute named name. So what do you do?

<%= form_for Sammich.new do |f| %>
  <%= f.label :sammich %>
  <%= f.text_field :name %>
  <%= f.submit %>
<% end %>

ruby-on-rails - Rspec - capybara::ElementNotFound: 无法找到字段“名称”

1 回答 1

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