4

RailsとRubyは初めてです。写真をアップロードできる簡単なアプリケーションを作成しています。ペーパークリップジェムをインストールしていて、モデル内で次のようにサムネイルサイズを指定するように構成しようとしています。

has_attached_file :photo, 
    :styles => {:thumb => '120x120>', :large => '640x480>' },
    :default_style => :thumb,
    :url => "/system/photos/:basename.:extension",
    :path => ":rails_root/public/system/photos/:basename.:extension"

しかし、私はエラーを受け取り続けます：

undefined method `match' for nil:NilClass

：stylesパラメーターを削除すると、すべてが期待どおりに機能します。

誰かが光を当てて私を正しい方向に向けることができますか？

ありがとう

編集：

スタックトレースは次のとおりです。

C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/content_type_detector.rb:60:in `type_from_file_command'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/content_type_detector.rb:16:in `detect'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/io_adapters/file_adapter.rb:14:in `cache_current_values'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/io_adapters/file_adapter.rb:5:in `initialize'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/io_adapters/registry.rb:29:in `new'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/io_adapters/registry.rb:29:in `for'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/attachment.rb:412:in `post_process_style'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/attachment.rb:402:in `block in post_process_styles'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/attachment.rb:401:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/attachment.rb:401:in `post_process_styles'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/attachment.rb:394:in `block (2 levels) in post_process'
activesupport (3.2.7) lib/active_support/callbacks.rb:403:in `_run__792123923__photo_post_process__530674861__callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.7) lib/active_support/callbacks.rb:385:in `_run_photo_post_process_callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:81:in `run_callbacks'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/callbacks.rb:26:in `run_paperclip_callbacks'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/attachment.rb:393:in `block in post_process'
activesupport (3.2.7) lib/active_support/callbacks.rb:403:in `_run__792123923__post_process__530674861__callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.7) lib/active_support/callbacks.rb:385:in `_run_post_process_callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:81:in `run_callbacks'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/callbacks.rb:26:in `run_paperclip_callbacks'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/attachment.rb:392:in `post_process'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip/attachment.rb:107:in `assign'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/paperclip-70f0f1fea030/lib/paperclip.rb:196:in `block in has_attached_file'
activerecord (3.2.7) lib/active_record/attribute_assignment.rb:85:in `block in assign_attributes'
activerecord (3.2.7) lib/active_record/attribute_assignment.rb:78:in `each'
activerecord (3.2.7) lib/active_record/attribute_assignment.rb:78:in `assign_attributes'
activerecord (3.2.7) lib/active_record/base.rb:498:in `initialize'
activerecord (3.2.7) lib/active_record/persistence.rb:44:in `new'
activerecord (3.2.7) lib/active_record/persistence.rb:44:in `create'
app/controllers/photography_controller.rb:23:in `create'
actionpack (3.2.7) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (3.2.7) lib/abstract_controller/base.rb:167:in `process_action'
actionpack (3.2.7) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (3.2.7) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
activesupport (3.2.7) lib/active_support/callbacks.rb:414:in `_run__403597772__process_action__67609296__callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.7) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.7) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.2.7) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (3.2.7) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
activesupport (3.2.7) lib/active_support/notifications.rb:123:in `block in instrument'
activesupport (3.2.7) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.7) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.7) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.2.7) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
activerecord (3.2.7) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (3.2.7) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.2.7) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.2.7) lib/action_controller/metal.rb:203:in `dispatch'
actionpack (3.2.7) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
actionpack (3.2.7) lib/action_controller/metal.rb:246:in `block in action'
actionpack (3.2.7) lib/action_dispatch/routing/route_set.rb:73:in `call'
actionpack (3.2.7) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
actionpack (3.2.7) lib/action_dispatch/routing/route_set.rb:36:in `call'
journey (1.0.4) lib/journey/router.rb:68:in `block in call'
journey (1.0.4) lib/journey/router.rb:56:in `each'
journey (1.0.4) lib/journey/router.rb:56:in `call'
actionpack (3.2.7) lib/action_dispatch/routing/route_set.rb:600:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
rack (1.4.1) lib/rack/etag.rb:23:in `call'
rack (1.4.1) lib/rack/conditionalget.rb:35:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/flash.rb:242:in `call'
rack (1.4.1) lib/rack/session/abstract/id.rb:205:in `context'
rack (1.4.1) lib/rack/session/abstract/id.rb:200:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/cookies.rb:338:in `call'
activerecord (3.2.7) lib/active_record/query_cache.rb:64:in `call'
activerecord (3.2.7) lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (3.2.7) lib/active_support/callbacks.rb:405:in `_run__122749671__call__530674861__callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.7) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
activesupport (3.2.7) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.7) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/reloader.rb:65:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.7) lib/rails/rack/logger.rb:26:in `call_app'
railties (3.2.7) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.1) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.1) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.7) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.1) lib/rack/lock.rb:15:in `call'
actionpack (3.2.7) lib/action_dispatch/middleware/static.rb:62:in `call'
railties (3.2.7) lib/rails/engine.rb:479:in `call'
railties (3.2.7) lib/rails/application.rb:220:in `call'
rack (1.4.1) lib/rack/content_length.rb:14:in `call'
railties (3.2.7) lib/rails/rack/log_tailer.rb:17:in `call'
rack (1.4.1) lib/rack/handler/webrick.rb:59:in `service'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'

PhotographyController：

def create
  @photo = Photo.create(params[:photo])
end

そして最後に、私のフォームの部分はいくつかの助けになるかもしれません：

<%= form_for @photo, :url => { :controller => 'photography', :action => 'create'}, :html => { :multipart => true } do |f| %>
  <% if @photo.errors.any? %>
  <div id="errorExplanation">
    <h2><%= pluralize(@photo.errors.count, "error") %> prohibited
        this photo from being saved:</h2>
    <ul>
    <% @photo.errors.full_messages.each do |msg| %>
      <li><%= msg %></li>
    <% end %>
    </ul>
  </div>
  <% end %>

  <div class="field">
    <%= f.label :title %><br />
    <%= f.text_field :title %>
  </div>
  <div class="field">
    <%= f.label :description %><br />
    <%= f.text_area :description %>
  </div>
  <%= f.file_field :photo %>
  <div class="actions">
    <%= f.submit ('Upload Photo') %>
  </div>
<% end %>

再度、感謝します。

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1 に答える 1

2

ペーパークリップを使用して、このエラーや他の同様のエラーに遭遇しました。しかし、私は開発環境をWindowsで実行しており、最新バージョンのペーパークリップは「file」コマンドを使用しています。これは、Windowsがあまり好まないようです。

うまくいけば、これはすぐに修正されるでしょうが、今のところ、動作するペーパークリップの最後のバージョン、つまり3.0.4を使用して問題を回避しました。

Windowsでも実行している場合は、これをGemfileに追加するだけです。

gem 'paperclip', '3.0.4'

PS開発では3.0.4を使用し、本番環境では最新バージョンを使用してみる価値があるかもしれません。

于 2012-08-02T09:48:51.410 に答える