ruby - Jekyll 错误 "Liquid Exception: undefined method ` 编码为 nil :NilClass in _layouts/post. html"

Question

尝试运行 jekyll build 或 jekyll serve 时出现以下错误:

Liquid Exception: undefined method 'encoding' for nil:NilClass in _layouts/post.html
jekyll 2.5.3 | Error: undefined method 'encoding' for nil:NilClass

看起来是 RVM/ruby 文件的问题？ (请参阅下面的 --trace 日志)但我并没有真正触及任何代码方面的东西(尤其是没有在任何 ruby​​ 文件中)并且在最后几次提交中没有编辑'/_layouts/post.html'并且这只是弹出上。

这是 Github 上的存储库:https://github.com/ryanstraits/ryanstraits.github.io , 虽然主分支是在发生此错误之前的最后一次提交。

不是一个认真的编码员，所以我有点困惑。任何帮助都会很棒。

这是我在运行 jekyll build --trace 时得到的结果:

Liquid Exception: undefined method encoding' for nil:NilClass in _layouts/post.html /Users/Straits/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/cgi/util.rb:8:inescape': undefined method encoding' for nil:NilClass (NoMethodError) from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/filters.rb:134:incgi_escape'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/strainer.rb:43:in invoke' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/context.rb:82:ininvoke'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/variable.rb:50:in block in render' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/variable.rb:38:ineach'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/variable.rb:38:in inject' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/variable.rb:38:inrender'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/block.rb:109:in block in render_all' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/block.rb:96:ineach'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/block.rb:96:in render_all' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/tags/if.rb:40:inblock (2 levels) in render'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/tags/if.rb:38:in each' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/tags/if.rb:38:inblock in render'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/context.rb:112:in stack' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/tags/if.rb:37:inrender'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/block.rb:109:in block in render_all' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/block.rb:96:ineach'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/block.rb:96:in render_all' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/tags/for.rb:117:inblock (2 levels) in render'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/tags/for.rb:105:in each' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/tags/for.rb:105:ineach_with_index'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/tags/for.rb:105:in block in render' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/context.rb:112:instack'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/tags/for.rb:104:in render' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/block.rb:109:inblock in render_all'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/block.rb:96:in each' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/block.rb:96:inrender_all'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/block.rb:82:in render' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/template.rb:128:inrender'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/liquid-2.6.2/lib/liquid/template.rb:138:in render!' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/convertible.rb:106:inrender_liquid'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/convertible.rb:205:in render_all_layouts' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/convertible.rb:239:indo_layout'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/post.rb:261:in render' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/site.rb:298:inblock in render'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/site.rb:297:in each' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/site.rb:297:inrender'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/site.rb:51:in process' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/command.rb:28:inprocess_site'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/commands/build.rb:56:in build' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/commands/build.rb:34:inprocess'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/lib/jekyll/commands/build.rb:18:in block (2 levels) in init_with_program' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:incall'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in block in execute' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:ineach'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in execute' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/mercenary-0.3.5/lib/mercenary/program.rb:42:ingo'
from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/mercenary-0.3.5/lib/mercenary.rb:19:in program' from /Users/Straits/.rvm/gems/ruby-2.2.0/gems/jekyll-2.5.3/bin/jekyll:20:in'
from /Users/Straits/.rvm/gems/ruby-2.2.0/bin/jekyll:23:in load' from /Users/Straits/.rvm/gems/ruby-2.2.0/bin/jekyll:23:in

'
from /Users/Straits/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in eval' from /Users/Straits/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in'

Answer 1

我的问题是:

{{ cgi_escape_title = page.title | cgi_escape }}

在我的 _layouts/default.html 中，对于没有 page.title 的页面。

一个解决方案是:

{{ page.title | default: "" | cgi_escape }}

将 nul 标题转换为 ""，或者如果您觉得更冗长:

{% if page.title %}
  {% assign cgi_escape_title = page.title | cgi_escape %}
{% else %}
  {% assign cgi_escape_title = '' %}
{% endif %}
{{ cgi_escape_title }}

在 Jekyll 3.0.3 上测试。