我在让 db:push 与 heroku 一起工作时遇到了一些问题。
正如我在其他地方所读到的，ruby 版本 > 1.9.3-p0 存在问题，因此我已降级到 1.9.2-p290，因为这似乎是最常见的建议。
这可以通过运行 ruby -v 来确认ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin11.4.0]
[teacherjoy (master)]$ heroku db:push
Loaded Taps v0.3.24
Auto-detected local database: sqlite://db/development.sqlite3
Warning: Data in the app 'teacherjoy' will be overwritten and will not be recoverable.
! WARNING: Destructive Action
! This command will affect the app: teacherjoy
! To proceed, type "teacherjoy" or re-run this command with --confirm teacherjoy
> teacherjoy
Sending schema
Schema: 100% |==========================================| Time: 00:00:05
Sending indexes
users: 100% |==========================================| Time: 00:00:02
schema_migrat: 100% |==========================================| Time: 00:00:01
Sending data
4 tables, 76 records
holders: 0% | | ETA: --:--:--
Saving session to push_201207160342.dat..
!!! Caught Server Exception
HTTP CODE: 500
Taps Server Error: PGError: ERROR: time zone displacement out of range: "2012-07-10 12:00:00.000000+5894685600"
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"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/adapters/postgres.rb:175:in `block (2 levels) in execute'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/database/logging.rb:28:in `log_yield'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/adapters/postgres.rb:175:in `block in execute'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/adapters/postgres.rb:158:in `check_disconnect_errors'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/adapters/postgres.rb:175:in `execute'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/adapters/postgres.rb:240:in `block (2 levels) in execute'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/connection_pool/threaded.rb:71:in `hold'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/database/connecting.rb:226:in `synchronize'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/adapters/postgres.rb:240:in `block in execute'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/adapters/postgres.rb:261:in `check_database_errors'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/adapters/postgres.rb:238:in `execute'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/database/query.rb:71:in `execute_dui'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/dataset/actions.rb:552:in `execute_dui'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/dataset/actions.rb:243:in `block (2 levels) in import'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/dataset/actions.rb:243:in `each'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/dataset/actions.rb:243:in `block in import'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/database/query.rb:223:in `_transaction'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/database/query.rb:209:in `block in transaction'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/connection_pool/threaded.rb:84:in `hold'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/database/connecting.rb:226:in `synchronize'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/database/query.rb:207:in `transaction'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/dataset/actions.rb:243:in `import'",
"/app/lib/taps/data_stream.rb:315:in `import_rows'",
"/app/lib/taps/data_stream.rb:158:in `fetch_remote_in_server'",
"/app/lib/taps/server.rb:114:in `block (3 levels) in <class:Server>'",
"/app/lib/taps/utils.rb:161:in `call'", "/app/lib/taps/utils.rb:161:in `server_error_handling'",
"/app/lib/taps/server.rb:112:in `block (2 levels) in <class:Server>'",
"/app/lib/taps/db_session.rb:15:in `block in conn'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/database/connecting.rb:76:in `connect'",
"/app/.bundle/gems/ruby/1.9.1/gems/sequel-3.20.0/lib/sequel/core.rb:119:in `connect'",
"/app/lib/taps/db_session.rb:14:in `conn'",
"/app/lib/taps/server.rb:111:in `block in <class:Server>'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:865:in `call'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:865:in `block in route'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:521:in `instance_eval'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:521:in `route_eval'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:500:in `block (2 levels) in route!'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:497:in `catch'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:497:in `block in route!'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:476:in `each'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:476:in `route!'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:601:in `dispatch!'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:411:in `block in call!'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:566:in `instance_eval'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:566:in `block in invoke'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:566:in `catch'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:566:in `invoke'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:411:in `call!'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:399:in `call'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:979:in `block in call'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:1005:in `synchronize'",
"/app/.bundle/gems/ruby/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:979:in `call'",
"/home/heroku_rack/lib/static_assets.rb:9:in `call'",
"/home/heroku_rack/lib/last_access.rb:15:in `call'",
"/app/.bundle/gems/ruby/1.9.1/gems/rack-1.2.1/lib/rack/urlmap.rb:47:in `block in call'",
"/app/.bundle/gems/ruby/1.9.1/gems/rack-1.2.1/lib/rack/urlmap.rb:41:in `each'",
"/app/.bundle/gems/ruby/1.9.1/gems/rack-1.2.1/lib/rack/urlmap.rb:41:in `call'",
"/home/heroku_rack/lib/date_header.rb:14:in `call'",
"/app/.bundle/gems/ruby/1.9.1/gems/rack-1.2.1/lib/rack/builder.rb:77:in `call'",
"/app/.bundle/gems/ruby/1.9.1/gems/thin-1.2.7/lib/thin/connection.rb:76:in `block in pre_process'",
"/app/.bundle/gems/ruby/1.9.1/gems/thin-1.2.7/lib/thin/connection.rb:74:in `catch'",
"/app/.bundle/gems/ruby/1.9.1/gems/thin-1.2.7/lib/thin/connection.rb:74:in `pre_process'",
"/app/.bundle/gems/ruby/1.9.1/gems/thin-1.2.7/lib/thin/connection.rb:57:in `process'",
"/app/.bundle/gems/ruby/1.9.1/gems/thin-1.2.7/lib/thin/connection.rb:42:in `receive_data'",
"/app/.bundle/gems/ruby/1.9.1/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run_machine'",
"/app/.bundle/gems/ruby/1.9.1/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run'",
"/app/.bundle/gems/ruby/1.9.1/gems/thin-1.2.7/lib/thin/backends/base.rb:57:in `start'",
"/app/.bundle/gems/ruby/1.9.1/gems/thin-1.2.7/lib/thin/server.rb:156:in `start'",
"/app/.bundle/gems/ruby/1.9.1/gems/thin-1.2.7/lib/thin/controllers/controller.rb:80:in `start'",
"/app/.bundle/gems/ruby/1.9.1/gems/thin-1.2.7/lib/thin/runner.rb:177:in `run_command'",
"/app/.bundle/gems/ruby/1.9.1/gems/thin-1.2.7/lib/thin/runner.rb:143:in `run!'",
"/app/.bundle/gems/ruby/1.9.1/gems/thin-1.2.7/bin/thin:6:in `<top (required)>'",
"/app/.bundle/gems/ruby/1.9.1/bin/thin:19:in `load'",
"/app/.bundle/gems/ruby/1.9.1/bin/thin:19:in `<main>'"]
是什么导致了这个问题和/或我该如何解决？