mysql – Rails 3 – 突然挂起的迁移错误

我突然遇到一个奇怪的错误.当我尝试运行rake spec时,我收到：

You have 2 pending migrations:
  20130405105004 CreateReports
  20130405113839 AddDocumentToReports

我不知道原因(我过去运行迁移所以我在数据库和schema.rb中有数据).

这是rake spec –trace：

** Invoke spec (first_time)
** Invoke test:prepare (first_time)
** Invoke db:test:prepare (first_time)
** Invoke db:abort_if_pending_migrations (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:abort_if_pending_migrations
You have 2 pending migrations:
  20130405105004 CreateReports
  20130405113839 AddDocumentToReports
Run "rake db:migrate" to update your database then try again.

这是rake db：migrate：status：

   ...
   up     20121210112419  Create simple captcha data
   up     20130214110545  Add weeknum to alerts
  down    20130405105004  Create reports
  down    20130405113839  Add document to reports
   up     20121018133601  *** NO FILE ***
   up     20121018163051  *** NO FILE ***
   up     20121024124111  *** NO FILE ***

这里是rake db：migrate

==  CreateReports: migrating ==================================================
-- create_table(:reports)
rake aborted!
An error has occurred, all later migrations canceled:

MysqL2::Error: Table 'reports' already exists: CREATE TABLE `reports` (`id` int(11) DEFAULT NULL auto_increment PRIMARY KEY, `user_id` int(11), `ready_status` tinyint(1) DEFAULT 0, `created_at` datetime, `updated_at` datetime) ENGINE=InnoDB

Tasks: TOP => db:migrate

我该如何解决这个问题？

解决方法:

如果这是在开发环境中并且您在数据库中没有重要数据,则运行

bundle exec rake db:migrate:reset

这将重建架构,但代价是核对所有数据.