Question

我最近从0.14.0更新到版本0.15.2，当我尝试执行#delete时我收到了以下的堆栈跟踪：

NoMethodError: undefined method `force_encoding' for nil:NilClass
from /Users/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/httparty-0.15.1/lib/httparty/request.rb:280:in `encode_with_ruby_encoding'
from /Users/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/httparty-0.15.1/lib/httparty/request.rb:316:in `_encode_body'
from /Users/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/httparty-0.15.1/lib/httparty/request.rb:322:in `encode_body'
from /Users/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/httparty-0.15.1/lib/httparty/request.rb:350:in `handle_response'
from /Users//.rben`enter code here`v/versions/2.4.0/lib/ruby/gems/2.4.0/gems/httparty-0.15.1/lib/httparty/request.rb:158:in `perform'
from /Users/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/httparty-0.15.1/lib/httparty.rb:563:in `perform_request'
from /Users/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/httparty-0.15.1/lib/httparty.rb:520:in `delete'
from /Users/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/httparty-0.15.1/lib/httparty.rb:617:in `delete'

我恢复到版本0.14.0并且问题不会持续存在。我是Ruby的初学者，我不确定这条消息的含义。

任何帮助都会感激不尽。

Answer 1

如果查看https://github.com/jnunemaker/httparty/blob/e9f4624c1172120bbd39ddc636620a24fc9386b1/lib/httparty/request.rb#L278，您可以看到堆栈跟踪中引用的force_encoding方法。

似乎响应没有正文，因此在nil对象上调用此方法，这会导致错误。这似乎是HTTParty中的一个错误。如果您可以找出一致地产生此问题的复制步骤，您可以为HTTParty人员打开一个github问题，以便进一步研究它。

HTTParty force_encoding：encode_with_ruby_encoding

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