3

これは、Rails でCounter Cache を作成しようとしたこの投稿Rails, data structure and performanceのフォローアップ です。デフォルトの 0 にならないように、列をデータベース内の既存のカウント値に更新することも追加しました。

開発環境で rake db:migrate を実行すると、実行に数時間かかりましたが、問題なく動作します。

しかし、heroku で移行を実行すると、次のエラーが発生します。

==  AddVotesCount: migrating ==================================================
-- add_column(:options, :votes_count, :integer, {:default=>0})
   -> 0.0196s
/Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:644:in `initialize': Operation timed out - connect(2) (Errno::ETIMEDOUT)
    from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:644:in `open'
    from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:644:in `block in connect'
    from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/timeout.rb:44:in `timeout'
    from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/timeout.rb:87:in `timeout'
    from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:644:in `connect'
    from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:637:in `do_start'
    from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:626:in `start'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/rest-client-1.6.7/lib/restclient/request.rb:172:in `transmit'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/rest-client-1.6.7/lib/restclient/request.rb:64:in `execute'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/rest-client-1.6.7/lib/restclient/request.rb:33:in `execute'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/rest-client-1.6.7/lib/restclient/resource.rb:51:in `get'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/client.rb:554:in `process'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/client.rb:532:in `get'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/client.rb:290:in `read'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/client.rb:311:in `each'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/command/run.rb:50:in `rake'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/command.rb:114:in `run'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/bin/heroku:14:in `<top (required)>'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/bin/heroku:19:in `load'
    from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/bin/heroku:19:in `<main>'

私はいくつかの異なることを試しましたが、この時点で迷っているようです。奇妙なことに、エラー メッセージは常にすぐに表示されるとは限らず、移行が実行されているかのように 10 ～ 20 分かかる場合があります。

ありがとう

更新:これが私の移行ファイルの内容です:

class AddVotesCount < ActiveRecord::Migration
  def self.up
    add_column :options, :votes_count, :integer, :default => 0
    Option.all.each do |option|
       option.votes_count = option.votes.count
       option.save!
     end
  end

  def self.down
    remove_column :options, :votes_count
  end
end

更新 2: これは、heroku を使用したステージング環境で動作しますが、本番環境では動作しません

いくつかの変更の後、移行コードは次のようになりました。

def self.up
    add_column :options, :votes_count, :integer, :default => 0
    Option.reset_column_information
    Option.find_each do |option|
      Option.reset_counters option.id, :votes
    end

エラーは次のとおりです。

==  AddVotesCount: migrating ==================================================
-- add_column(:options, :votes_count, :integer, {:default=>0})
-> 0.0224s
/Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:644:in `initialize': getaddrinfo: nodename nor servname provided, or not known (SocketError)
        from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:644:in `open'
        from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:644:in `block in connect'
        from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/timeout.rb:44:in `timeout'
        from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/timeout.rb:87:in `timeout'
        from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:644:in `connect'
        from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:637:in `do_start'
        from /Users/ebellity/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:626:in `start'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/rest-client-1.6.7/lib/restclient/request.rb:172:in `transmit'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/rest-client-1.6.7/lib/restclient/request.rb:64:in `execute'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/rest-client-1.6.7/lib/restclient/request.rb:33:in `execute'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/rest-client-1.6.7/lib/restclient/resource.rb:51:in `get'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/client.rb:554:in `process'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/client.rb:532:in `get'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/client.rb:290:in `read'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/client.rb:311:in `each'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/command/run.rb:50:in `rake'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/lib/heroku/command.rb:114:in `run'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.8.4/bin/heroku:14:in `<top (required)>'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/bin/heroku:19:in `load'
        from /Users/ebellity/.rvm/gems/ruby-1.9.2-p136/bin/heroku:19:in `<main>'
4

1 に答える 1

2

同じエラーに直面する可能性がある人のために、heroku に連絡したところ、次のように移行を実行するように言われました。

$ heroku run bash --app appname

それから

$ rake db:migrate

なぜか効いた…

于 2011-09-30T09:36:51.547 に答える