Rails Paperclip gem错误的参数个数错误

Question

我正在处理我的第一个RoR项目，并尝试使用Paperclip gem，但我遇到了一个我无法理解的错误：

  

错误的参数数量（1表示0）
  app / controllers / events_controller.rb：43：在`create＆＃39;
  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=#<File:/tmp/RackMultipart20130217-21480-1molvwa>>,
 "description"=>"",
 "date"=>"",
 "time"=>""},
 "commit"=>"Create Event"}

据我所知，在create方法的events_controller.rb中，传入了太多的参数。但是，我遵循了Paperclip的Github上的QuickStart说明，所以我不确定为什么我会这样做。得到这个错误。

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 < ActiveRecord::Base
    attr_accessible :date, :description, :time, :title, :image
    has_attached_file :image, :styles => { :medium => "300x300>", :thumb => "100x100>" }
end

我已经检查过我为所有内容运行了正确的版本。我有Paperclip 3.4.0，Rails 3.2.12，Ruby 1.9.3和ImageMagick 6.8.3-1。我使用的是Ubuntu 12.04 LTS。

我看过很多类似的问题，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。我在类似帖子中发现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帮助我走上正轨。

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！

应用程序跟踪：

  

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 run＆＃39;   /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＆＃39;   /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/geometry_detector_factory.rb:17:in   geometry_string' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/geometry_detector_factory.rb:9:in 使＆＃39;   /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 初始化＆＃39;   /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/processor.rb:33:in   new' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/processor.rb:33:in 使＆＃39;   /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 各＆＃39;   /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/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 post_process_style＆＃39;   /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:423: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 各＆＃39;   /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:422:in   post_process＆＃39;中的post_process_styles' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:415:in 块（2级） activesupport（3.2.12）   LIB / active_support / callbacks.rb：403：在   _run__3384881169595487878__image_post_process__96086910066492375__callbacks' activesupport (3.2.12) lib/active_support/callbacks.rb:405:in __ run_callback＆＃39; activesupport（3.2.12）   LIB / active_support / callbacks.rb：385：在   _run_image_post_process_callbacks' activesupport (3.2.12) lib/active_support/callbacks.rb:81:in run_callbacks＆＃39;   /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/callbacks.rb:26:in   post_process中的run_paperclip_callbacks' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:414:in 阻止＆＃39; activesupport（3.2.12）   LIB / active_support / callbacks.rb：403：在   _run__3384881169595487878__post_process__96086910066492375__callbacks' activesupport (3.2.12) lib/active_support/callbacks.rb:405:in __ run_callback＆＃39; activesupport（3.2.12）   lib / active_support / callbacks.rb：385：在_run_post_process_callbacks' activesupport (3.2.12) lib/active_support/callbacks.rb:81:in run_callbacks＆＃39;   /home/user/.rvm/gems/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 post_process＆＃39;   /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip/attachment.rb:108:in   has_attached_file＆＃39;中的assign' /home/user/.rvm/gems/ruby-1.9.3-p385/bundler/gems/paperclip-dcd2774e7913/lib/paperclip.rb:200:in阻止activerecord（3.2.12）   lib / active_record / attribute_assignment.rb:85：block in assign_attributes' activerecord (3.2.12) lib/active_record/attribute_assignment.rb:78:in每个＆＃39; ActiveRecord的   （3.2.12）lib / active_record / attribute_assignment.rb:78:in   assign_attributes' activerecord (3.2.12) lib/active_record/base.rb:497:in初始化＆＃39; activerecord（3.2.12）   lib / active_record / persistence.rb：44：在new' activerecord (3.2.12) lib/active_record/persistence.rb:44:in创建＆＃39;   app / controllers / events_controller.rb：43：在create' actionpack (3.2.12) lib/action_controller/metal/implicit_render.rb:4:in send_action＆＃39; actionpack（3.2.12）   lib / abstract_controller / base.rb：167：在process_action' actionpack (3.2.12) lib/action_controller/metal/rendering.rb:10:in process_action＆＃39; actionpack（3.2.12）   lib / abstract_controller / callbacks.rb:18:in block in process_action' activesupport (3.2.12) lib/active_support/callbacks.rb:414:in 运行 _3332570171411252513__process_action_ 3320642634939127128 _callbacks＆＃39; 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＆＃39;   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＆＃39; ActionPack的   （3.2.12）lib / action_controller / metal / rescue.rb：29：在process_action' actionpack (3.2.12) lib/action_controller/metal/instrumentation.rb:30:in块中   process_action＆＃39; activesupport（3.2.12）   lib / active_support / notifications.rb:123:in block in instrument' activesupport (3.2.12) lib/active_support/notifications/instrumenter.rb:20:in instrument＆＃39;   activesupport（3.2.12）lib / active_support / notifications.rb:123:in   instrument' actionpack (3.2.12) lib/action_controller/metal/instrumentation.rb:29:in process_action＆＃39;   actionpack（3.2.12）   lib / action_controller / metal / params_wrapper.rb：207：在process_action' activerecord (3.2.12) lib/active_record/railties/controller_runtime.rb:18:in process_action＆＃39; actionpack（3.2.12）   lib / abstract_controller / base.rb：121：在process' actionpack (3.2.12) lib/abstract_controller/rendering.rb:45:in进程＆＃39; ActionPack的   （3.2.12）lib / action_controller / metal.rb：203：在dispatch' actionpack (3.2.12) lib/action_controller/metal/rack_delegation.rb:14:in 发送＆＃39; actionpack（3.2.12）lib / action_controller / metal.rb：246：in   block in action' actionpack (3.2.12) lib/action_dispatch/routing/route_set.rb:73:in呼叫＆＃39; ActionPack的   （3.2.12）lib / action_dispatch / routing / route_set.rb：73：在dispatch' actionpack (3.2.12) lib/action_dispatch/routing/route_set.rb:36:in 电话＆＃39;旅程（1.0.4）lib / journey / router.rb：68：block in call' journey (1.0.4) lib/journey/router.rb:56:in每个＆＃39;旅程（1.0.4）   lib / journey / router.rb：56：call' actionpack (3.2.12) lib/action_dispatch/routing/route_set.rb:601:in来电＆＃39; ActionPack的   （3.2.12）   lib / action_dispatch / middleware / best_standards_support.rb:17:in call' rack (1.4.5) lib/rack/etag.rb:23:in来电＆＃39;机架（1.4.5）   lib / rack / conditionalget.rb:35:in call' actionpack (3.2.12) lib/action_dispatch/middleware/head.rb:14:in来电＆＃39; ActionPack的   （3.2.12）lib / action_dispatch / middleware / params_parser.rb：21：在call' actionpack (3.2.12) lib/action_dispatch/middleware/flash.rb:242:in 电话＆＃39; rack（1.4.5）lib / rack / session / abstract / id.rb:210:in context' rack (1.4.5) lib/rack/session/abstract/id.rb:205:in call＆＃39; ActionPack的   （3.2.12）lib / action_dispatch / middleware / cookies.rb：341：在call' activerecord (3.2.12) lib/active_record/query_cache.rb:64:in电话＆＃39;   activerecord（3.2.12）   LIB / active_record / connection_adapters /抽象/ connection_pool.rb：479：在   call' actionpack (3.2.12) lib/action_dispatch/middleware/callbacks.rb:28:in阻止通话＆＃39;   activesupport（3.2.12）lib / active_support / callbacks.rb：405：in   _run__1281245379307539657__call__96086910066492375__callbacks' activesupport (3.2.12) lib/active_support/callbacks.rb:405:in __ run_callback＆＃39; activesupport（3.2.12）   lib / active_support / callbacks.rb：385：在_run_call_callbacks' activesupport (3.2.12) lib/active_support/callbacks.rb:81:in run_callbacks＆＃39; actionpack（3.2.12）   lib / action_dispatch / middleware / callbacks.rb：27：call' actionpack (3.2.12) lib/action_dispatch/middleware/reloader.rb:65:in来电＆＃39;   actionpack（3.2.12）lib / action_dispatch / middleware / remote_ip.rb:31:in   call' actionpack (3.2.12) lib/action_dispatch/middleware/debug_exceptions.rb:16:in呼叫＆＃39;   actionpack（3.2.12）   lib / action_dispatch / middleware / show_exceptions.rb:56:in call' railties (3.2.12) lib/rails/rack/logger.rb:32:in call_app＆＃39; railties   （3.2.12）lib / rails / rack / logger.rb:16:in block in call' activesupport (3.2.12) lib/active_support/tagged_logging.rb:22:in已标记＆＃39; railties   （3.2.12）lib / rails / rack / logger.rb:16:in call' actionpack (3.2.12) lib/action_dispatch/middleware/request_id.rb:22:in call＆＃39;机架（1.4.5）   lib / rack / methodoverride.rb：21：在call' rack (1.4.5) lib/rack/runtime.rb:17:in来电＆＃39; activesupport（3.2.12）   lib / active_support / cache / strategy / local_cache.rb:72:in call' rack (1.4.5) lib/rack/lock.rb:15:in call＆＃39; actionpack（3.2.12）   lib / action_dispatch / middleware / static.rb:62:in call' railties (3.2.12) lib/rails/engine.rb:479:in call＆＃39;铁路（3.2.12）   lib / rails / application.rb：223：call' rack (1.4.5) lib/rack/content_length.rb:14:in来电＆＃39;铁路（3.2.12）   lib / rails / rack / log_tailer.rb:17:in call' rack (1.4.5) lib/rack/handler/webrick.rb:59:in service＆＃39;   /home/user/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/webrick/httpserver.rb:138:in   service' /home/user/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/webrick/httpserver.rb:94:in 运行＆＃39;   /home/user/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/webrick/server.rb:191:in   `阻止在start_thread＆＃39;

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启动rails服务器。

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

见上面的评论。