Rails 3 - 突然发生的迁移错误

Question

我突然遇到一个奇怪的错误.当我尝试运行rake spec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？

Answer 1

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.