在heroku上運行遷移時出現問題

這是本帖子Rails, data structure and performance的後續內容，我嘗試在Rails上創建計數器緩存。爲了不讓它默認爲0，我還添加了將列更新到數據庫中現有的計數值。在heroku上運行遷移時出現問題

運行rake db：遷移開發工作正常，即使花了幾個小時運行。

但使用了Heroku的遷移是給我下面的錯誤：

== 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>'

我已經嘗試了一些不同的事情，但在這一點上似乎失去了，任何幫助表示讚賞！奇怪的是，錯誤消息並不總是立即出現，有時需要10/20分鐘，就好像遷移正在運行一樣。

感謝

更新：這裏是我的移民文件的內容：

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：該作品在臨時環境與Heroku的......但不是在生產

後很少修改，遷移代碼現在是：

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

and er ROR是：

== 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>'

來源

2011-09-27 Emmanuel

你的遷移文件的內容是什麼？ – Dogbert

@Dogbert只編輯了這個問題，添加了遷移文件 – Emmanuel

Completey的幫助，但是你真的需要這種遷移嗎？你能不能在Option模型中創建一個名爲votes_count的方法，該方法返回votes.count？ – Yule

對於那些誰可能面臨同樣的錯誤，我在Heroku上取得了聯繫，他們告訴我要運行這個遷移：

$ heroku run bash --app appname

然後

$ rake db:migrate

由於某種原因，它工作...

來源

2011-09-30 09:36:51 Emmanuel

對於'$ heroku run bash'爲+1。我不知道你可以在你的本地終端上運行bash。 –

在heroku上運行遷移時出現問題

回答

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