0

こんにちは、私は Ruby on Rails プラットフォームの初心者で、railstutorial.org の本を読んでいます。私の Micopost1.rb ファイルの内容は次のとおりです。

class Micropost1 < ActiveRecord::Base
  attr accessible :content, :user_id

belongs_to :user

validates :content, :length => { :maximum => 140 }

end

そして、rails.console コマンドを実行すると、console に最初に user.microposts と入力するとコンソールが開き、次のエラー ログが表示されます。

SyntaxError: /home/ritesh/projects/demo/app/models/micropost1.rb:2: syntax error, unexpected tIDENTIFIER, expecting kEND
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:469:in `load'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:469:in `load_file'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:639:in `new_constants_in'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:468:in `load_file'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:353:in `require_or_load'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:502:in `load_missing_constant'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:192:in `const_missing'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:190:in `each'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:190:in `const_missing'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:514:in `load_missing_constant'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:192:in `const_missing'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:190:in `each'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:190:in `const_missing'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/inflector/methods.rb:219:in `constantize'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/inflector/methods.rb:218:in `each'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/inflector/methods.rb:218:in `constantize'
... 10 levels...
    from /var/lib/gems/1.8/gems/activerecord-3.2.9/lib/active_record/associations/collection_proxy.rb:44:in `__send__'
    from /var/lib/gems/1.8/gems/activerecord-3.2.9/lib/active_record/associations/collection_proxy.rb:44:in `load_target'
    from /var/lib/gems/1.8/gems/activerecord-3.2.9/lib/active_record/associations/collection_proxy.rb:87:in `method_missing'
    from /usr/lib/ruby/1.8/irb.rb:310:in `output_value'
    from /usr/lib/ruby/1.8/irb.rb:159:in `eval_input'
    from /usr/lib/ruby/1.8/irb.rb:271:in `signal_status'
    from /usr/lib/ruby/1.8/irb.rb:155:in `eval_input'
    from /usr/lib/ruby/1.8/irb.rb:154:in `eval_input'
    from /usr/lib/ruby/1.8/irb.rb:71:in `start'
    from /usr/lib/ruby/1.8/irb.rb:70:in `catch'
    from /usr/lib/ruby/1.8/irb.rb:70:in `start'
    from /var/lib/gems/1.8/gems/railties-3.2.9/lib/rails/commands/console.rb:47:in `start'
    from /var/lib/gems/1.8/gems/railties-3.2.9/lib/rails/commands/console.rb:8:in `start'
    from /var/lib/gems/1.8/gems/railties-3.2.9/lib/rails/commands.rb:41
    from script/rails:6:in `require'
    from script/rails:6irb(main):004:0> first_user.micropost1s
NoMethodError: undefined method `accessible' for #<Class:0xb6651934>
    from /var/lib/gems/1.8/gems/activerecord-3.2.9/lib/active_record/dynamic_matchers.rb:50:in `method_missing'
    from /home/ritesh/projects/demo/app/models/micropost1.rb:2
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:469:in `load'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:469:in `load_file'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:639:in `new_constants_in'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:468:in `load_file'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:353:in `require_or_load'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:502:in `load_missing_constant'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:192:in `const_missing'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:190:in `each'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:190:in `const_missing'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:514:in `load_missing_constant'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:192:in `const_missing'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:190:in `each'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:190:in `const_missing'
    from /var/lib/gems/1.8/gems/activesupport-3.2.9/lib/active_support/inflector/methods.rb:219:in `constantize'
... 12 levels...
    from /var/lib/gems/1.8/gems/activerecord-3.2.9/lib/active_record/associations/collection_proxy.rb:44:in `__send__'
    from /var/lib/gems/1.8/gems/activerecord-3.2.9/lib/active_record/associations/collection_proxy.rb:44:in `load_target'
    from /var/lib/gems/1.8/gems/activerecord-3.2.9/lib/active_record/associations/collection_proxy.rb:87:in `method_missing'
    from /usr/lib/ruby/1.8/irb.rb:310:in `output_value'
    from /usr/lib/ruby/1.8/irb.rb:159:in `eval_input'
    from /usr/lib/ruby/1.8/irb.rb:271:in `signal_status'
    from /usr/lib/ruby/1.8/irb.rb:155:in `eval_input'
    from /usr/lib/ruby/1.8/irb.rb:154:in `eval_input'
    from /usr/lib/ruby/1.8/irb.rb:71:in `start'
    from /usr/lib/ruby/1.8/irb.rb:70:in `catch'
    from /usr/lib/ruby/1.8/irb.rb:70:in `start'
    from /var/lib/gems/1.8/gems/railties-3.2.9/lib/rails/commands/console.rb:47:in `start'
    from /var/lib/gems/1.8/gems/railties-3.2.9/lib/rails/commands/console.rb:8:in `start'
    from /var/lib/gems/1.8/gems/railties-3.2.9/lib/rails/commands.rb:41
    from script/rails:6:in `require'

1 つは User で、2 番目は Micropost1 の 2 つのモデルがあります。最初に変数 first_user first_user=User.first を割り当てるためにこのコマンドを実行します。間違っているところを指摘してください。

4

3 に答える 3

3

attr accessible1つの単語にする必要があります:attr_accessible

スタック トレースを調べると、次のエラーが表示されます。

NoMethodError: undefined method `accessible' for #<Class:0xb6651934>
  from /var/lib/gems/1.8/gems/activerecord-3.2.9/lib/active_record/dynamic_matchers.rb:50:in `method_missing'
  from /home/ritesh/projects/demo/app/models/micropost1.rb:2

このエラーは、micropost1.rb ファイルの 2 行目に、存在しないメソッドが呼び出されていることを示しています。

于 2012-12-17T14:00:28.277 に答える
2

これを試して...

class Micropost1 < ActiveRecord::Base
  attr_accessible :content, :user_id

  belongs_to :user

  validates :content, :length => { :maximum => 140 }

end

モデルに記述したものは「attraccessible」であり、上記のように「attr_accessible」です...

于 2012-12-17T14:05:20.707 に答える
0

シャーロックホームズのふりをして、調査を行う必要があります。

手がかり1 

SyntaxError: /home/ritesh/projects/demo/app/models/micropost1.rb:2: syntax error, unexpected tIDENTIFIER, expecting kEND

あなたはあなたが持っているエラーの種類、構文エラーを知っています。スペルを間違えました。

手がかり2

よく見ると、他の手がかりがあることがわかります。これは、モデル内にあることを示し、コードの2行目にあることmicropost1.rb:2を意味します。:2

手がかり3

さて、あなたはエラーがどこにあるか、そしてそれがどんな種類のエラーであるかを知っています。しかし、どういうunexpected tIDENTIFIER, expecting kEND意味ですか？Googleはあなたのワトソンです。そして彼はあなたに6630の異なる答えを与えます。

名探偵コナン

モデルに書き込んだのは、であることがわかりました。'attr accessible'代わりに、である必要があります'attr_accessible'。

于 2012-12-17T16:04:52.567 に答える