我正试图在Lion上使用postgresql和我的rails开发。 我的机器当前设置为从单独的高清上的固态和存储/主文件夹启动。 我可以用post创建postgres的用户

createuser

命令

但是当我尝试使用rake创建数据库时

我收到这个错误

could not connect to server: Connection refused Is the server running
locally and accepting connections on Unix domain socket
"/var/pgsql_socket/.s.PGSQL.5432"?
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1076:in
initialize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1076:in
new'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1076:in
connect'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:312:ininitialize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in
new'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in
postgresql_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:304:in
new_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:323:in
checkout_new_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in
block (2 levels) in checkout'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:261:in
loop'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:261:in
block in checkout'
/Volumes/Lion/Users/atbyrd/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in
mon_synchronize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:260:in
checkout'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:162:in
connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:409:in
retrieve_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in
retrieve_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:89:in connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:110:in
rescue in create_database'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:54:in
create_database'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:33:in
block (5 levels) in '
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:151:in
local_database?'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:33:in
block (4 levels) in '
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:19:in
each_value'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:19:in
block (3 levels) in '
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in
call'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in
block in execute'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in
each'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in
execute'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:158:in
block in invoke_with_call_chain'
/Volumes/Lion/Users/atbyrd/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in
mon_synchronize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:151:in
invoke_with_call_chain'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:144:in
invoke'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:116:in
invoke_task'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in
block (2 levels) in top_level'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in
each'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in
block in top_level'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:133:in
standard_exception_handling'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:88:in
top_level'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:66:in
block in run'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:133:in
standard_exception_handling'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:63:in
run'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/bin/rake:33:in
'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in
load'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in
' Couldn't create database for {"adapter"=>"postgresql",
"encoding"=>"unicode","database"=>"alpha_development","pool"=>5,
"username"=>"alpha","password"=>nil} could not connect to server:
Connection refused Is the server running locally and accepting
connections on Unix domain socket"/var/pgsql_socket/.s.PGSQL.5432"?
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1076:in
initialize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1076:in
new'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1076:in
connect'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:312:ininitialize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in
new'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in
postgresql_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:304:in
new_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:323:in
checkout_new_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in
block (2 levels) in checkout'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:261:in
loop'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:261:in
block in checkout'
/Volumes/Lion/Users/atbyrd/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in
mon_synchronize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:260:in
checkout'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:162:in
connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:409:in
retrieve_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in
retrieve_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:89:in connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:110:in
rescue in create_database'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:54:in
create_database'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:33:in
block (5 levels) in '
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:151:in
local_database?'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:33:in
block (4 levels) in '
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:19:in
each_value'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:19:in
block (3 levels) in '
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in
call'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in
block in execute'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in
each'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in
execute'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:158:in
block in invoke_with_call_chain'
/Volumes/Lion/Users/atbyrd/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in
mon_synchronize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:151:in
invoke_with_call_chain'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:144:in
invoke'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:116:in
invoke_task'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in
block (2 levels) in top_level'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in
each'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in
block in top_level'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:133:in
standard_exception_handling'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:88:in
top_level'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:66:in
block in run'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:133:in
standard_exception_handling'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:63:in
run'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/bin/rake:33:in
'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in
load'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in
' Couldn't create database for {"adapter"=>"postgresql",
"encoding"=>"unicode","database"=>"alpha_test","pool"=>5,
"username"=>"alpha","password"=>nil} could not connect to server:
Connection refused Is the server running locally and accepting
connections on Unix domain socket"/var/pgsql_socket/.s.PGSQL.5432"?
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1076:in
initialize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1076:in
new'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1076:in
connect'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:312:ininitialize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in
new'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in
postgresql_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:304:in
new_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:323:in
checkout_new_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in
block (2 levels) in checkout'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:261:in
loop'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:261:in
block in checkout'
/Volumes/Lion/Users/atbyrd/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in
mon_synchronize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:260:in
checkout'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:162:in
connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:409:in
retrieve_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in
retrieve_connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:89:in connection'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:110:in
rescue in create_database'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:54:in
create_database'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:33:in
block (5 levels) in '
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:151:in
local_database?'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:33:in
block (4 levels) in '
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:19:in
each_value'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.1.3/lib/active_record/railties/databases.rake:19:in
block (3 levels) in '
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in
call'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:205:in
block in execute'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in
each'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:200:in
execute'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:158:in
block in invoke_with_call_chain'
/Volumes/Lion/Users/atbyrd/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/monitor.rb:201:in
mon_synchronize'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:151:in
invoke_with_call_chain'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/task.rb:144:in
invoke'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:116:in
invoke_task'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in
block (2 levels) in top_level'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in
each'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:94:in
block in top_level'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:133:in
standard_exception_handling'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:88:in
top_level'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:66:in
block in run'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:133:in
standard_exception_handling'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/application.rb:63:in
run'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/bin/rake:33:in
'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in
load'
/Volumes/Lion/Users/atbyrd/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in
' Couldn't create database for {"adapter"=>"postgresql",
"encoding"=>"unicode","database"=>"alpha_production","pool"=>5,
"username"=>"alpha","password"=>nil}

您的问题与Lion或SSD无关。

请先检查你的pgsql是否正在运行。

PostgreSQL默认应该在5432端口上监听。