不能轉儲遠程數據庫

Question

我在database.yml文件

development: 
    adapter: mysql2 
    encoding: utf8 
    reconnect: false 
    database: oma_development 
    pool: 5 
    username: root 
    password: 
    host: localhost 

test: 
    # same as in development section 

production: 
    # same as in development section 


development_blacklist: 
    adapter: mysql2 
    encoding: utf8 
    database: webstuff 
    username: login 
    password: password 
    host: remote-database.com 

test_blacklist: 
    adapter: mysql2 
    encoding: utf8 
    database: webstuff 
    username: megas 
    password: 
    host: /var/run/mysqld/mysqld.sock 

此數據庫配置，我想執行的rake任務：

namespace :db do 
    namespace :schema do 
    desc 'Dump blacklist database schema' 
    task :dump => [:environment, :load_config] do 
     filename = "#{Rails.root}/db/blacklist_schema.rb" 
     File.open(filename, 'w:utf-8') do |file| 
     ActiveRecord::Base.establish_connection("development_blacklist") 
     ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, file) 
     end 
    end 
    end 
end 

通過調用該命令：

rake db:schema:dump 

而且我有錯誤：

rake aborted! 
Access denied for user 'root'@'localhost' (using password: NO) 

所以看起來rake任務試圖從development部分連接到數據庫。

我不明白爲什麼rake任務試圖連接到development數據庫，而rake任務應該連接到development_blacklist數據庫。

如何設置rake任務只連接到development_blacklist數據庫？

Answer 1

您可以明確地設置環境，例如：

$ RAILS_ENV=production rake db:schema:dump