请参阅底部的更新
我试图使用＆＃39; delayed_jobs＆＃39;宝石在我的项目中。我在本地环境中完成了所有工作，但是当我将项目移动到Heroku上时，我无法进行db：migrate＆＃39;，并且无法启动我的服务器。以下是我遵循的步骤。
*使用＆＃39; delayed_job＆＃39;运行bundle_install和＆＃39; delayed_job_active_record＆＃39;在我的宝石文件中
*我没有运行'ails generate delayed_job：active_record＆＃39;因为迁移文件从我运行时移动到服务器，所以ails生成delayed_job：active_record＆＃39;在DEV中
*我运行rake db：migrate并且失败并出现以下错误，不确定如何修复。 （注意：由于表不存在，导致迁移失败，这是一个很大的问题，因为我需要运行迁移来创建表）。
[?25l[?25hUnable to write PID file to /app/tmp/pids/delayed_job.pid [ActiveJob] Enqueued SquareOrderCleanupJob (Job ID: c364f5c1-a3c3-401a-95a6-a567a2813942) to DelayedJob(default) at 2016-06-04 14:57:56 UTC [ActiveJob] Mysql2::Error: Table 'heroku_fc2daea183dcdd6.delayed_jobs' doesn't exist: SHOW FULL FIELDS FROM `delayed_jobs` rake aborted! ActiveRecord::StatementInvalid: Mysql2::Error: Table 'heroku_fc2daea183dcdd6.delayed_jobs' doesn't exist: SHOW FULL FIELDS FROM `delayed_jobs` /app/vendor/bundle/ruby/2.2.0/gems/mysql2-0.3.21/lib/mysql2/client.rb:80:in `_query' /app/vendor/bundle/ruby/2.2.0/gems/mysql2-0.3.21/lib/mysql2/client.rb:80:in `block in query' /app/vendor/bundle/ruby/2.2.0/gems/mysql2-0.3.21/lib/mysql2/client.rb:79:in `handle_interrupt' /app/vendor/bundle/ruby/2.2.0/gems/mysql2-0.3.21/lib/mysql2/client.rb:79:in `query' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:305:in `block in execute' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_adapter.rb:473:in `block in log' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/notifications/instrumenter.rb:20:in `instrument' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_adapter.rb:467:in `log' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:305:in `execute' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/mysql2_adapter.rb:231:in `execute' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:312:in `execute_and_free' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:457:in `columns' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/schema_cache.rb:43:in `columns' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/attributes.rb:93:in `columns' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/attributes.rb:98:in `columns_hash' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/inheritance.rb:205:in `subclass_from_attributes?' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/inheritance.rb:54:in `new' /app/vendor/bundle/ruby/2.2.0/gems/delayed_job-4.1.2/lib/delayed/backend/base.rb:16:in `enqueue_job' /app/vendor/bundle/ruby/2.2.0/gems/delayed_job-4.1.2/lib/delayed/backend/base.rb:12:in `enqueue' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/queue_adapters/delayed_job_adapter.rb:22:in `enqueue_at' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/enqueuing.rb:69:in `block in enqueue' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:115:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:115:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:553:in `block (2 levels) in compile' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:503:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:503:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:496:in `block (2 levels) in around' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:341:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:341:in `block (2 levels) in simple' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/logging.rb:14:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/logging.rb:14:in `block (3 levels) in ' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/logging.rb:43:in `block in tag_logger' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/tagged_logging.rb:68:in `block in tagged' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/tagged_logging.rb:26:in `tagged' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/tagged_logging.rb:68:in `tagged' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/logging.rb:43:in `tag_logger' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/logging.rb:13:in `block (2 levels) in ' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:439:in `instance_exec' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:439:in `block in make_lambda' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:340:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:340:in `block in simple' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:495:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:495:in `block in around' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:503:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:503:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:88:in `run_callbacks' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/enqueuing.rb:67:in `enqueue' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/configured_job.rb:13:in `perform_later' /app/config/initializers/schedule_jobs.rb:2:in `' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:in `load' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:in `block in load' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:240:in `load_dependency' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:in `load' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/engine.rb:652:in `block in load_config_initializer' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/notifications.rb:166:in `instrument' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/engine.rb:651:in `load_config_initializer' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/engine.rb:616:in `block (2 levels) in ' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/engine.rb:615:in `each' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/engine.rb:615:in `block in ' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:30:in `instance_exec' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:30:in `run' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:55:in `block in run_initializers' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:44:in `each' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:44:in `tsort_each_child' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:44:in `each' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:44:in `tsort_each_child' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:54:in `run_initializers' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/application.rb:352:in `initialize!' /app/config/environment.rb:5:in `' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `block in require' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:240:in `load_dependency' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/application.rb:328:in `require_environment!' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/application.rb:457:in `block in run_tasks_blocks' Mysql2::Error: Table 'heroku_fc2daea183dcdd6.delayed_jobs' doesn't exist /app/vendor/bundle/ruby/2.2.0/gems/mysql2-0.3.21/lib/mysql2/client.rb:80:in `_query' /app/vendor/bundle/ruby/2.2.0/gems/mysql2-0.3.21/lib/mysql2/client.rb:80:in `block in query' /app/vendor/bundle/ruby/2.2.0/gems/mysql2-0.3.21/lib/mysql2/client.rb:79:in `handle_interrupt' /app/vendor/bundle/ruby/2.2.0/gems/mysql2-0.3.21/lib/mysql2/client.rb:79:in `query' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:305:in `block in execute' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_adapter.rb:473:in `block in log' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/notifications/instrumenter.rb:20:in `instrument' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_adapter.rb:467:in `log' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:305:in `execute' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/mysql2_adapter.rb:231:in `execute' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:312:in `execute_and_free' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:457:in `columns' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/connection_adapters/schema_cache.rb:43:in `columns' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/attributes.rb:93:in `columns' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/attributes.rb:98:in `columns_hash' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/inheritance.rb:205:in `subclass_from_attributes?' /app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.2.3/lib/active_record/inheritance.rb:54:in `new' /app/vendor/bundle/ruby/2.2.0/gems/delayed_job-4.1.2/lib/delayed/backend/base.rb:16:in `enqueue_job' /app/vendor/bundle/ruby/2.2.0/gems/delayed_job-4.1.2/lib/delayed/backend/base.rb:12:in `enqueue' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/queue_adapters/delayed_job_adapter.rb:22:in `enqueue_at' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/enqueuing.rb:69:in `block in enqueue' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:115:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:115:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:553:in `block (2 levels) in compile' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:503:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:503:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:496:in `block (2 levels) in around' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:341:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:341:in `block (2 levels) in simple' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/logging.rb:14:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/logging.rb:14:in `block (3 levels) in ' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/logging.rb:43:in `block in tag_logger' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/tagged_logging.rb:68:in `block in tagged' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/tagged_logging.rb:26:in `tagged' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/tagged_logging.rb:68:in `tagged' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/logging.rb:43:in `tag_logger' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/logging.rb:13:in `block (2 levels) in ' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:439:in `instance_exec' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:439:in `block in make_lambda' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:340:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:340:in `block in simple' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:495:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:495:in `block in around' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:503:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:503:in `call' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/callbacks.rb:88:in `run_callbacks' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/enqueuing.rb:67:in `enqueue' /app/vendor/bundle/ruby/2.2.0/gems/activejob-4.2.3/lib/active_job/configured_job.rb:13:in `perform_later' /app/config/initializers/schedule_jobs.rb:2:in `' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:in `load' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:in `block in load' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:240:in `load_dependency' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:in `load' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/engine.rb:652:in `block in load_config_initializer' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/notifications.rb:166:in `instrument' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/engine.rb:651:in `load_config_initializer' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/engine.rb:616:in `block (2 levels) in ' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/engine.rb:615:in `each' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/engine.rb:615:in `block in ' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:30:in `instance_exec' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:30:in `run' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:55:in `block in run_initializers' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:44:in `each' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:44:in `tsort_each_child' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:44:in `each' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:44:in `tsort_each_child' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/initializable.rb:54:in `run_initializers' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/application.rb:352:in `initialize!' /app/config/environment.rb:5:in `' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `block in require' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:240:in `load_dependency' /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/application.rb:328:in `require_environment!' /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.3/lib/rails/application.rb:457:in `block in run_tasks_blocks' Tasks: TOP => db:migrate => environment (See full trace by running task with --trace) [?25h
的更新
我发现问题是由我的rails应用程序初始化时执行以下代码引起的。通过暂时删除它，然后在迁移完成后将其重新添加，我能够使迁移工作（代码要求迁移在运行之前运行）。这是一个临时补丁，所以我将努力为未来的PROD推送获得更好的解决方案。我想我可以在运行代码之前找到检查表是否存在的方法，但如果有人知道更好的方法，请告诉我。
system("ruby lib/background_job start")
SquareOrderCleanupJob.set(wait: 10.minute).perform_later()
at_exit do
system("ruby lib/background_job stop")
end
答案 0 :(得分：0)