我使用的是PostgreSQL,Rails 3.1.3和Ruby 1.9.3。我正在努力使用db:migrate
,如here所述。db:迁移挂在简单迁移
这是我在终端是送走:
[email protected]:~/railsprojects/hartl$ bundle exec rake db:migrate --trace
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke db:load_config (first_time)
** Invoke rails_env (first_time)
** Execute rails_env
** Execute db:load_config
** Execute db:migrate
== AddEmailUniquenessIndex: migrating ========================================
-- add_index(:users, :email, {:unique=>true})
,然后将代码挂起,在这一点上。任何想法为什么?
来源:development.log
[1m[36m (0.1ms)[0m [1mSHOW search_path[0m
[1m[35m (0.5ms)[0m SELECT "schema_migrations"."version" FROM "schema_migrations"
Migrating to CreateUsers (20120124022843)
Migrating to AddEmailUniquenessIndex (20120124093922)
[1m[36m (0.1ms)[0m [1mBEGIN[0m
[1m[35m (3.6ms)[0m SELECT distinct i.relname, d.indisunique, d.indkey, t.oid
FROM pg_class t
INNER JOIN pg_index d ON t.oid = d.indrelid
INNER JOIN pg_class i ON d.indexrelid = i.oid
WHERE i.relkind = 'i'
AND d.indisprimary = 'f'
AND t.relname = 'users'
AND i.relnamespace IN (SELECT oid FROM pg_namespace WHERE nspname = ANY (current_schemas(false)))
ORDER BY i.relname
就可以登录一个适当特权PostgreSQL用户,并做'SELECT * FROM pg_stat_activity' – derobert
我当然可以。我刚刚通过pgAdmin III执行了此查询: - 执行查询: select * from pg_stat_activity 查询总运行时间:11毫秒。 检索4行。 – Abram
@derobert,谢谢你的回应,但是今天早上的迁移对我有用。没什么不同 - 相同的迁移文件。也许电脑只需要重启?奇怪。 – Abram