在rails中显示待定迁移

Question

是否有rake任务显示rails应用程序中的待定迁移？

Answer 1

rake db:migrate:status将在Rails 3中完成此任务.请参阅提交.

Answer 2

有rake db:abort_if_pending_migrations(至少在Rails 2.3.3中,不确定何时引入).描述说"如果有待处理的迁移,则会引发错误".这似乎更多地用作其他任务的先决条件,但我猜你可以将它用于你的目的.

编辑:这是刚刚生成并且未运行"测试"迁移后的输出示例

rails_project theIV$ rake db:abort_if_pending_migrations
(in /Users/theIV/Sites/rails_project/)
You have 1 pending migrations:
  20090828200602 Test
Run "rake db:migrate" to update your database then try again.

Answer 3

rake db:version 将在Rails 2上完成此任务.

Answer 4

此命令将列出所有迁移及其状态(UP或DOWN)

Rails 3和4

rake db:migrate:status

Rails 5

rake db:migrate:status

# Or

rails db:migrate:status

Answer 5

这适用于 rails 5.2

ActiveRecord::Base.connection.migration_context.needs_migration?