我正在使用Postgresql,Rails 3.1.3和
Ruby 1.9.3.我正在努力使用db：migrate,如
here所述.
这就是我在终端中看到的：
funkdified@funkdified-laptop:~/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})
然后代码挂起.有什么想法吗？
来自：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