使用开发数据库而不是ENV ['DATABASE_URL']的Heroku上的DataMapper连接？

Question

我的问题是，当部署到Heroku DataMapper试图使用这部分我的数据库连接信息'postgres://postgres:myohmysosecret@localhost/recall'当我有DataMapper.setup(:default, ENV['DATABASE_URL'] || 'postgres://postgres:myohmysosecret@localhost/recall')作为我的完整数据库连接。

这是我的Heroku的日志文件：

2012-07-08T06:49:40+00:00 heroku[web.1]: Starting process with command `bundle exec rackup config.ru -p 26035` 
2012-07-08T06:49:48+00:00 app[web.1]: Is the server running on host "localhost" and accepting 
2012-07-08T06:49:48+00:00 app[web.1]: from <internal:prelude>:10:in `synchronize' 
2012-07-08T06:49:48+00:00 app[web.1]: /app/vendor/bundle/ruby/1.9.1/gems/data_objects-0.10.8/lib/data_objects/connection.rb:79:in `initialize': could not connect to server: Connection refused (DataObjects::ConnectionError) 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/data_objects-0.10.8/lib/data_objects/pooling.rb:177:in `block in new' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/data_objects-0.10.8/lib/data_objects/pooling.rb:172:in `new' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/data_objects-0.10.8/lib/data_objects/connection.rb:79:in `new' 
2012-07-08T06:49:48+00:00 app[web.1]: TCP/IP connections on port 5432? 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-do-adapter-1.2.0/lib/dm-do-adapter/adapter.rb:251:in `open_connection' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/data_objects-0.10.8/lib/data_objects/connection.rb:68:in `new' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/data_objects-0.10.8/lib/data_objects/pooling.rb:119:in `new' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-transactions-1.2.0/lib/dm-transactions/adapters/dm-do-adapter.rb:69:in `open_connection' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-do-adapter-1.2.0/lib/dm-do-adapter/adapter.rb:276:in `with_connection' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-do-adapter-1.2.0/lib/dm-do-adapter/adapter.rb:61:in `execute' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-migrations-1.2.0/lib/dm-migrations/adapters/dm-postgres-adapter.rb:60:in `ensure in without_notices' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-migrations-1.2.0/lib/dm-migrations/adapters/dm-postgres-adapter.rb:60:in `without_notices' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-migrations-1.2.0/lib/dm-migrations/adapters/dm-postgres-adapter.rb:18:in `upgrade_model_storage' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-migrations-1.2.0/lib/dm-migrations/auto_migration.rb:73:in `upgrade_model_storage' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-migrations-1.2.0/lib/dm-migrations/auto_migration.rb:47:in `block in repository_execute' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-migrations-1.2.0/lib/dm-migrations/auto_migration.rb:145:in `auto_upgrade!' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-core-1.2.0/lib/dm-core/support/descendant_set.rb:64:in `block in each' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-core-1.2.0/lib/dm-core/support/ordered_set.rb:319:in `each' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-core-1.2.0/lib/dm-core/support/ordered_set.rb:319:in `block in each' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-core-1.2.0/lib/dm-core/support/subject_set.rb:210:in `block in each' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-core-1.2.0/lib/dm-core/support/ordered_set.rb:319:in `each' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-core-1.2.0/lib/dm-core/support/subject_set.rb:210:in `each' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-core-1.2.0/lib/dm-core/support/descendant_set.rb:63:in `each' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-migrations-1.2.0/lib/dm-migrations/auto_migration.rb:46:in `repository_execute' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/dm-migrations-1.2.0/lib/dm-migrations/auto_migration.rb:27:in `auto_upgrade!' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/recall.rb:25:in `<top (required)>' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/config.ru:2:in `require' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/config.ru:2:in `block in <main>' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/config.ru:1:in `new' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/config.ru:1:in `<main>' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:40:in `parse_file' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:40:in `eval' 
2012-07-08 
T06:49:48+00:00 app[web.1]:  from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:200:in `app' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:301:in `wrapped_app' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:252:in `start' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/bin/rackup:4:in `<top (required)>' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:137:in `start' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/bin/rackup:19:in `load' 
2012-07-08T06:49:48+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/bin/rackup:19:in `<main>' 

Answer 1

我有这个问题，到底它似乎与以下，这是对Heroku tutorial，但看似错误：

ENV['DATABASE_URL'] 

基本上，你可能没有数据库。运行heroku config显示了这一点。然后

heroku addons:add heroku-postgresql:dev 

要么再次运行heroku config得到数据库字符串，或者你可能只使用下面的行放在DataMapper.setup：您可以运行下面的线，为您创建一个数据库，详细here ：

ENV['HEROKU_POSTGRESQL_CYAN_URL'] 

希望这有助于！我已经将它添加到我自己的Heroku支持票，看看他们说什么！