Rails Paperclip gem错误的参数个数错误

我正在研究我的第一个RoR项目并试图使用Paperclip gem，但我遇到了一个我似乎无法弄清楚的错误：

错误的参数数量（1表示0）
app / controllers / events_controller.rb：43：在’create’中
参数：

{"utf8"=>"✓", "authenticity_token"=>"OBYHA0M+TA93sNF3uqrJ/zvnnEyWJUREn4NcOl0ExfA=", "event"=>{"title"=>"", "image"=>#<ActionDispatch::Http::UploadedFile:0x007f803802b1f0 @original_filename="icon.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"event[image]\"; filename=\"icon.png\"\r\nContent-Type: image/png\r\n", @tempfile=#>, "description"=>"", "date"=>"", "time"=>""}, "commit"=>"Create Event"} 

我知道在create方法的events_controller.rb中，传入了太多的参数。但是，我遵循Paperclip的Github上的QuickStart指令，所以我不确定为什么我会收到此错误。

这是我的events_controller.rb代码

 def create @event = Event.create( params[:event] ) end 

只是为了调试，我尝试将行更改为Event.create（params []），此时错误从错误的参数数量（1表示0）变为错误的参数数量（0表示1）。

这是我的event.rb代码

 class Event  { :medium => "300x300>", :thumb => "100x100>" } end 

我已经检查过我正在运行所有版本的正确版本。 我有Paperclip 3.4.0，Rails 3.2.12，Ruby 1.9.3和ImageMagick 6.8.3-1。 我正在使用Ubuntu 12.04 LTS。

我看了很多类似的问题，但大多数似乎发生在几年前，并在随后的Paperclip更新中得到解决。 我在类似post中找到的解决方案都没有为我工作，不幸的是我只有足够的Rails经验才知道发生了什么。 我意识到我可能犯了一个全新的错误，在这种情况下我道歉但仍然非常感谢一些帮助让我走上正轨。

如果有任何其他代码或信息对调试有用，请告诉我。

谢谢你的时间！

应用跟踪：

可卡因（0.3.2）lib / cocaine / command_line.rb:63:in run' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/helpers.rb:31:in /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/ run' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/helpers.rb:31:in运行’/home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/geometry_detector_factory.rb:18:in block in geometry_string' activesupport (3.2.12) lib/active_support/core_ext/kernel/reporting.rb:43:in silence_stream’ block in geometry_string' activesupport (3.2.12) lib/active_support/core_ext/kernel/reporting.rb:43:in paperclip / geometry_detector_factory.rb：17：在geometry_string' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/geometry_detector_factory.rb:9:in /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/geometry_detector_factory.rb:9:in make’ /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/geometry.rb:26:in from_file' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/thumbnail.rb:35:in user/ from_file' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/thumbnail.rb:35:in initialize’ from_file' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/thumbnail.rb:35:in纸夹-dcd2774e7913 / LIB /纸夹/ processo r.rb：33：在new' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/processor.rb:33:in make’/ home /user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:431:in block in post_process_style' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:430:in每个’/home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/中paperclip-dcd2774e7913 / lib / paperclip / attachment.rb：430：in inject' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:430:in /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb inject' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:430:in block in post_process_styles' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:422:in inject' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:430:in 423 inject' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:430:in block in post_process_styles' 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callbacks.rb:385 ：in _run_image_post_process_callbacks' activesupport (3.2.12) lib/active_support/callbacks.rb:81:in run_callbacks’ _run_image_post_process_callbacks' activesupport (3.2.12) lib/active_support/callbacks.rb:81:in / paperclip/ run_paperclip_callbacks' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:414:in in run_paperclip_callbacks' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:414:in home/ run_paperclip_callbacks' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:414:in .rvm/ run_paperclip_callbacks' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:414:in ruby- run_paperclip_callbacks' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:414:in p385/ run_paperclip_callbacks' 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lib/active_support/callbacks.rb:405:in __run_c allback’activesupport（3.2.12）lib / active_support / callbacks.rb：385：in _run_post_process_callbacks' activesupport (3.2.12) lib/active_support/callbacks.rb:81:in run_callbacks’ _run_post_process_callbacks' activesupport (3.2.12) lib/active_support/callbacks.rb:81:in ruby-1.9.3-p385 / bundler / gems / paperclip-dcd2774e7913 / lib / paperclip / callbacks.rb:26:in run_paperclip_callbacks' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:413:in /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems run_paperclip_callbacks' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:413:in dcd2774e7913/ run_paperclip_callbacks' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:413:in paperclip/ run_paperclip_callbacks' 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actionpack (3.2.12) lib/action_controller/metal/implicit_render.rb:4:in send_action’actionpack（3.2.12）lib / abstract_controller / base.rb：167：in process_action' actionpack (3.2.12) lib/action_controller/metal/rendering.rb:10:in process_action’actionpack（3.2.12）lib / abstract_controller / callbacks.rb：18： block in process_action' activesupport (3.2.12) lib/active_support/callbacks.rb:414:in中的block in process_action' activesupport (3.2.12) lib/active_support/callbacks.rb:414:in 运行 _3332570171411252513__process_action_ 3320642634939127128 _callbacks’activesupport（3.2.12）lib / active_support / callbacks.rb:405：in __run_callback' activesupport (3.2.12) lib/active_support/callbacks.rb:385:in _run_process_action_callbacks’activesupport（3.2.12）lib /active_support/callbacks.rb:81:in run_callbacks' actionpack (3.2.12) lib/abstract_controller/callbacks.rb:17:in process_action’actionpack（3.2.12）l ib / action_controller / metal / rescue.rb：29：在process_action' actionpack (3.2.12) 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Answer 1

您使用的是可卡因的错误版本。 运行bundle install然后确保使用bundle exec rails s来启动rails服务器。

较新版本的可卡因（〜> 0.4.0）中的run方法采用可选参数（ def run(interpolations = {}) ），旧版本（0.3.2）没有。

见上面的评论。