Heroku - Rails 3到3.1與PosgreSQL的遷移問題：關係「用戶」不存在

Question

我一直在關注如何從Rails 3移動到3.1並使其在Heroku上工作的文檔。我使用了這裏給出的手動升級技術：http://webtempest.com/upgrade-rails-3-to-3-1/

我已經取得了一些緩慢的進展，但使它與Heroku一起工作已經非常痛苦。目前，我的應用程序可以在本地正常運行rails 3.1。我應該讓你知道，在開發模式中，我使用的是mysql（僅僅是因爲有選擇使用sequel pro，我還沒有完全想到如何在本地使用postgres）。事情是，我沒有任何問題，推動我的應用程序heroku，而在軌道3.0，並在那裏用postgres和本地與MySQL有史以來。它一直很好。但是，現在我已經轉移到3.1，使用heroku雪松堆棧，我遇到以下問題，同時跟隨heroku文檔：http://devcenter.heroku.com/articles/rails31_heroku_cedar

以下是我試圖遷移或重置我的應用程序的時候碰到的錯誤將代碼推送到heroku後，以及當我重新啓動應用程序。

Running rake db:reset attached to terminal... up, run.9 
Couldn't drop hvifyyqdjs : #<ActiveRecord::StatementInvalid: PGError: ERROR: must be owner of database hvifyyqdjs 
: DROP DATABASE IF EXISTS "hvifyyqdjs"> 
hvifyyqdjs already exists 
rake aborted! 
PGError: ERROR: relation "users" does not exist 
:    SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull 
       FROM pg_attribute a LEFT JOIN pg_attrdef d 
       ON a.attrelid = d.adrelid AND a.attnum = d.adnum 
      WHERE a.attrelid = '"users"'::regclass 
       AND a.attnum > 0 AND NOT a.attisdropped 
      ORDER BY a.attnum 

有關如何解決此問題的任何想法？我正在使用這裏提到的'用戶'的設計插件。我對這個問題的研究使我較早相信我的遷移可能還沒有創建用戶表正常，但是在嘗試重新啓動在Heroku上的應用程序時，我的第一個遷移文件並創建用戶表

class DeviseCreateUsers < ActiveRecord::Migration 
    def self.up 
    create_table(:users) do |t| 
     t.database_authenticatable :null => false 
     t.recoverable 
     t.rememberable 
     t.trackable 

     # t.encryptable 
     # t.confirmable 
     # t.lockable :lock_strategy => :failed_attempts, :unlock_strategy => :both 
     # t.token_authenticatable 


     t.timestamps 
    end 

    add_index :users, :email,    :unique => true 
    add_index :users, :reset_password_token, :unique => true 
    # add_index :users, :confirmation_token, :unique => true 
    # add_index :users, :unlock_token,   :unique => true 
    # add_index :users, :authentication_token, :unique => true 
    end 

    def self.down 
    drop_table :users 
    end 
end 

，這我在日誌中看到的東西

2011-09-28T09:55:08+00:00 app[web.1]: => Booting WEBrick 
2011-09-28T09:55:08+00:00 app[web.1]: => Rails 3.1.0 application starting in production on http://0.0.0.0:33603 
2011-09-28T09:55:08+00:00 app[web.1]: => Call with -d to detach 
2011-09-28T09:55:08+00:00 app[web.1]: => Ctrl-C to shutdown server 
2011-09-28T09:55:08+00:00 app[web.1]: Exiting 
2011-09-28T09:55:08+00:00 app[web.1]: /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:962:in `async_exec': PGError: ERROR: relation "users" does not exist (ActiveRecord::StatementInvalid) 
2011-09-28T09:55:08+00:00 app[web.1]: :    SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull 
2011-09-28T09:55:08+00:00 app[web.1]:    FROM pg_attribute a LEFT JOIN pg_attrdef d 
2011-09-28T09:55:08+00:00 app[web.1]:     ON a.attrelid = d.adrelid AND a.attnum = d.adnum 
2011-09-28T09:55:08+00:00 app[web.1]:    WHERE a.attrelid = '"users"'::regclass 
2011-09-28T09:55:08+00:00 app[web.1]:    AND a.attnum > 0 AND NOT a.attisdropped 
2011-09-28T09:55:08+00:00 app[web.1]:    ORDER BY a.attnum 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:962:in `exec_no_cache' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:551:in `block in exec_query' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract_adapter.rb:244:in `block in log' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.1.0/lib/active_support/notifications/instrumenter.rb:21:in `instrument' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract_adapter.rb:239:in `log' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:550:in `exec_query' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:1061:in `column_definitions' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/postgresql_adapter.rb:740:in `columns' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:95:in `block (2 levels) in initialize' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:185:in `with_connection' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:92:in `block in initialize' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/base.rb:706:in `yield' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/base.rb:706:in `default' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/base.rb:706:in `columns' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/base.rb:722:in `column_names' 
2011-09-28T09:55:08+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/base 

任何幫助，建議或提示將不勝感激。

Answer 1

我能解決這個問題。

我的一個初始化文件做的是find_or_create_by_id，它在開發過程中工作正常，但由於我現在正在部署一個新的新應用程序，因此缺少表是該錯誤的來源，並且還阻止了遷移命令運行並創建缺少的表。它與PostgerSQL的語法無關。

Answer 2

看看第一個錯誤信息：「錯誤：必須是數據庫hvifyyqdjs的所有者」你（或你的程序）不準砸

。