0

我尝试用 ruby​​（css、js 等）构建一个主题，但我有一个错误，我花了几个小时试图解决它并阅读文档，但没有成功。

这是我在执行以下操作时遇到的错误： bundle exec middleman build --verbose

== Request: /pages/forms/forms.html
       error  build/pages/forms/forms.html
can't convert nil into String
/var/lib/gems/1.9.1/gems/activesupport-3.2.14/lib/active_support/core_ext/string/output_safety.rb:114:in `concat'
/var/lib/gems/1.9.1/gems/activesupport-3.2.14/lib/active_support/core_ext/string/output_safety.rb:114:in `safe_concat'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-more/core_extensions/default_helpers.rb:63:in `block in content_tag'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-more/core_extensions/default_helpers.rb:63:in `each'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-more/core_extensions/default_helpers.rb:63:in `content_tag'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/vendored-middleman-deps/padrino-helpers-0.11.2/lib/padrino-helpers/tag_helpers.rb:140:in `safe_content_tag'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/vendored-middleman-deps/padrino-helpers-0.11.2/lib/padrino-helpers/form_helpers.rb:646:in `select_tag'
/home/polylan/Documents/dev/core-admin-release/source/pages/forms/forms.html.erb:60:in `block in singletonclass'
/home/polylan/Documents/dev/core-admin-release/source/pages/forms/forms.html.erb:65530:in `instance_eval'
/home/polylan/Documents/dev/core-admin-release/source/pages/forms/forms.html.erb:65530:in `singletonclass'
/home/polylan/Documents/dev/core-admin-release/source/pages/forms/forms.html.erb:65528:in `__tilt_16623600'
/var/lib/gems/1.9.1/gems/tilt-1.3.7/lib/tilt/template.rb:144:in `call'
/var/lib/gems/1.9.1/gems/tilt-1.3.7/lib/tilt/template.rb:144:in `evaluate'
/var/lib/gems/1.9.1/gems/tilt-1.3.7/lib/tilt/template.rb:77:in `render'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/core_extensions/rendering.rb:273:in `render_individual_file'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/core_extensions/rendering.rb:150:in `render_template'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/sitemap/resource.rb:150:in `block in render'
/var/lib/gems/1.9.1/gems/activesupport-3.2.14/lib/active_support/notifications.rb:125:in `instrument'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/util.rb:60:in `instrument'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/application.rb:196:in `instrument'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/sitemap/resource.rb:16:in `instrument'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/sitemap/resource.rb:121:in `render'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/core_extensions/request.rb:252:in `process_request'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/core_extensions/request.rb:202:in `block in call!'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/core_extensions/request.rb:201:in `catch'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/core_extensions/request.rb:201:in `call!'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/core_extensions/request.rb:187:in `call'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/builder.rb:138:in `call'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/urlmap.rb:65:in `block in call'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/urlmap.rb:50:in `each'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/urlmap.rb:50:in `call'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-more/extensions/minify_css.rb:48:in `call'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/lint.rb:49:in `_call'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/lint.rb:37:in `call'
/var/lib/gems/1.9.1/gems/rack-1.5.2/lib/rack/builder.rb:138:in `call'
/var/lib/gems/1.9.1/gems/rack-test-0.6.2/lib/rack/mock_session.rb:30:in `request'
/var/lib/gems/1.9.1/gems/rack-test-0.6.2/lib/rack/test.rb:230:in `process_request'
/var/lib/gems/1.9.1/gems/rack-test-0.6.2/lib/rack/test.rb:57:in `get'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/cli/build.rb:138:in `render_to_file'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/cli/build.rb:280:in `block in execute!'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/cli/build.rb:277:in `each'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/cli/build.rb:277:in `execute!'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/cli/build.rb:199:in `invoke!'
/var/lib/gems/1.9.1/gems/thor-0.18.1/lib/thor/actions.rb:95:in `action'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/cli/build.rb:64:in `build'
/var/lib/gems/1.9.1/gems/thor-0.18.1/lib/thor/command.rb:27:in `run'
/var/lib/gems/1.9.1/gems/thor-0.18.1/lib/thor/invocation.rb:120:in `invoke_command'
/var/lib/gems/1.9.1/gems/thor-0.18.1/lib/thor.rb:363:in `dispatch'
/var/lib/gems/1.9.1/gems/thor-0.18.1/lib/thor/base.rb:439:in `start'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/cli.rb:77:in `method_missing'
/var/lib/gems/1.9.1/gems/thor-0.18.1/lib/thor/command.rb:29:in `run'
/var/lib/gems/1.9.1/gems/thor-0.18.1/lib/thor/command.rb:128:in `run'
/var/lib/gems/1.9.1/gems/thor-0.18.1/lib/thor/invocation.rb:120:in `invoke_command'
/var/lib/gems/1.9.1/gems/thor-0.18.1/lib/thor.rb:363:in `dispatch'
/var/lib/gems/1.9.1/gems/thor-0.18.1/lib/thor/base.rb:439:in `start'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/lib/middleman-core/cli.rb:22:in `start'
/var/lib/gems/1.9.1/gems/middleman-core-3.1.4/bin/middleman:18:in `<top (required)>'
/usr/local/bin/middleman:23:in `load'
/usr/local/bin/middleman:23:in `<main>'

这是结果：捆绑安装

Using i18n (0.6.5) 
Using multi_json (1.7.9) 
Using activesupport (3.2.14) 
Using chunky_png (1.2.8) 
Using coffee-script-source (1.6.3) 
Using execjs (1.4.0) 
Using coffee-script (2.2.0) 
Using fssm (0.2.10) 
Using sass (3.2.10) 
Using compass (0.12.2) 
Using ffi (1.9.0) 
Using tilt (1.3.7) 
Using haml (4.0.3) 
Using hike (1.2.3) 
Using json (1.7.7) 
Using kramdown (1.1.0) 
Using rb-fsevent (0.9.3) 
Using rb-inotify (0.9.1) 
Using rb-kqueue (0.2.0) 
Using listen (1.2.3) 
Using bundler (1.3.5) 
Using rack (1.5.2) 
Using rack-test (0.6.2) 
Using thor (0.18.1) 
Using middleman-core (3.1.4) 
Using middleman-more (3.1.4) 
Using sprockets (2.10.0) 
Using sprockets-helpers (1.0.1) 
Using sprockets-sass (1.0.1) 
Using middleman-sprockets (3.1.4) 
Using uglifier (2.1.2) 
Using middleman (3.1.4) 
Your bundle is complete!
Use `bundle show [gemname]` to see where a bundled gem is installed.

我的宝石文件

source 'http://rubygems.org'

gem "middleman", "~>3.1.4"
# Live-reloading plugin
gem "middleman-livereload", "~> 3.1.0"
gem 'json', '~> 1.7.7'

gem 'therubyracer'

if RUBY_PLATFORM =~ /linux/i
  gem 'rb-inotify', '~> 0.9'
else
  gem 'rb-inotify'
end

我使用： ruby​​ 1.9.1 ruby​​1.9.1-dev 中间人（最新版本） nodejs therubyracer execjs

更新 1：

感谢 j03w 评论，错误看起来确实是 forms.html.erb 中的这部分代码

<li>
  <label>Dropdown with search:</label>
  <%= select_tag :colors, options: @colorList.shuffle, class: "chzn-select" %>
</li>

<li>
  <label>Dropdown menu:</label>
  <%= select_tag :colors, options: @colorList.shuffle, class: "uniform" %>
</li>

这是我的 config.rb 的一部分，其中数组是：

@release = false

@colorList = ["Aero blue","Air Force blue (RAF)","Air Force blue (USAF)","Air superiority blue","Alabama Crimson","Alice blue","Alizarin crimson","Alloy orange","Almond","Amaranth","Amazon","Amber",
              "SAE/ECE Amber (color)","American rose","Amethyst","Android Green","Anti-flash white","Antique brass","Antique bronze","Antique fuchsia "]

如果您需要更多信息，请随时询问。

如果您遇到同样的问题或对该错误有任何想法，我们将不胜感激。

提前致谢。

扬

4

1 回答 1

0

J03w 是对的。看起来它与您传递给 select_tag 中的选项的 @ 变量有关。

我想不通，但想出了一个替代方案，它使用 ruby​​ 每个循环来创建选择列表选项，效果很好。

<ul>
    <li>
        <label>Dropdown with search:</label>
        <select name="color-search" id="color-search" class="chzn-select">
            <% @colorList.shuffle.each do |color| %>
                <option value="<%= color %>"><%= color %></option>
            <% end %>
        </select>
    </li>

    <li>
        <label>Dropdown menu:</label>
        <select name="colors" id="colors" class="uniform">
            <% @colorList.shuffle.each do |color| %>
                <option value="<%= color %>"><%= color %></option>
            <% end %>
        </select>
    </li>
</ul>

我会继续玩，看看我是否能弄清楚你最初的问题，但希望这能帮助你同时转移到其他事情上。

更新 1：看起来中间人不喜欢将数组传递给 select_tag 的 options 参数，这很奇怪，因为它应该可以正常工作。最初我认为这是存储在@colorList 中的数组中的数据，但它都检查出来了。

我什至尝试将其简化为中间人文档中使用的示例，但仍然出现 nil String 错误。我难住了。

也许最新版本的中间人有问题（我使用的是 3.1.4）？

于 2013-08-16T14:29:05.240 回答