我刚刚在新计算机上安装了rails和postgresql（通过以下this教程），我正在尝试运行之前已经制作并正在生产的rails应用程序。但是，一旦我尝试运行该应用程序，我收到此错误：
/home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/postgresql_adapter.rb:1222:in `initialize': FATAL: password authentication failed for user "rooms" (PG::ConnectionBad)
FATAL: password authentication failed for user "rooms"
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/postgresql_adapter.rb:1222:in `new'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/postgresql_adapter.rb:1222:in `connect'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/postgresql_adapter.rb:324:in `initialize'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `new'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `postgresql_connection'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/abstract/connection_pool.rb:315:in `new_connection'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/abstract/connection_pool.rb:325:in `checkout_new_connection'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/abstract/connection_pool.rb:247:in `block (2 levels) in checkout'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `loop'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `block in checkout'
from /home/andrew/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/abstract/connection_pool.rb:239:in `checkout'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/abstract/connection_pool.rb:102:in `block in connection'
from /home/andrew/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/abstract/connection_pool.rb:101:in `connection'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/abstract/connection_pool.rb:410:in `retrieve_connection'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/abstract/connection_specification.rb:171:in `retrieve_connection'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/connection_adapters/abstract/connection_specification.rb:145:in `connection'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/model_schema.rb:310:in `clear_cache!'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activerecord-3.2.19/lib/active_record/railtie.rb:103:in `block (2 levels) in <class:Railtie>'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activesupport-3.2.19/lib/active_support/callbacks.rb:418:in `_run__3258742772582479979__prepare__847046652929319931__callbacks'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activesupport-3.2.19/lib/active_support/callbacks.rb:405:in `__run_callback'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activesupport-3.2.19/lib/active_support/callbacks.rb:385:in `_run_prepare_callbacks'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activesupport-3.2.19/lib/active_support/callbacks.rb:81:in `run_callbacks'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/actionpack-3.2.19/lib/action_dispatch/middleware/reloader.rb:74:in `prepare!'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/actionpack-3.2.19/lib/action_dispatch/middleware/reloader.rb:48:in `prepare!'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/application/finisher.rb:47:in `block in <module:Finisher>'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/initializable.rb:30:in `instance_exec'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/initializable.rb:30:in `run'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/initializable.rb:55:in `block in run_initializers'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/initializable.rb:54:in `each'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/initializable.rb:54:in `run_initializers'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/application.rb:136:in `initialize!'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /home/andrew/Documents/mywebroom/config/environment.rb:5:in `<top (required)>'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activesupport-3.2.19/lib/active_support/dependencies.rb:251:in `require'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activesupport-3.2.19/lib/active_support/dependencies.rb:251:in `block in require'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activesupport-3.2.19/lib/active_support/dependencies.rb:236:in `load_dependency'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/activesupport-3.2.19/lib/active_support/dependencies.rb:251:in `require'
from /home/andrew/Documents/mywebroom/config.ru:3:in `block in <main>'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'
from /home/andrew/Documents/mywebroom/config.ru:in `new'
from /home/andrew/Documents/mywebroom/config.ru:in `<main>'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/rack-1.4.5/lib/rack/server.rb:200:in `app'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/commands/server.rb:46:in `app'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/rack-1.4.5/lib/rack/server.rb:304:in `wrapped_app'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/rack-1.4.5/lib/rack/server.rb:254:in `start'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/commands/server.rb:70:in `start'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/commands.rb:55:in `block in <top (required)>'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/commands.rb:50:in `tap'
from /home/andrew/.rvm/gems/ruby-2.1.2/gems/railties-3.2.19/lib/rails/commands.rb:50:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
以下是我的database.yml文件的样子：
development:
adapter: postgresql
encoding: unicode
host: localhost
database: rooms_development
pool: 5
username: rooms
password: rooms
我还是铁杆新手，我不知道如何解决这个问题 - 请帮忙！
答案 0 :(得分：2)
那是Postgres告诉你密码登录失败了。 The manual advises:
这样的消息表明你联系了服务器，它就是 愿意与你交谈，但直到你通过授权
pg_hba.conf文件中指定的方法。检查你的密码 如果投诉，提供或检查您的Kerberos或身份软件 提到了其中一种身份验证类型。
有更多的建议...
或者在这个相关的答案中：
答案 1 :(得分：2)
我在Ubuntu机器上面临同样的问题，所以我使用以下步骤将其删除。
从控制台切换到postgres用户
$ sudo su - postgres
它将要求输入密码，默认密码为postgres
将用户切换到postgres后，打开psql console
$ psql
如果有多个版本可用，请检查postgres的版本
psql=# select VERSION();
PostgreSQL 9.1.13 on x86_64-unk.... # so version is 9.1
现在打开postgres user
vim /etc/postgresql/9.1/main/pg_hba.conf
9.1是版本返回表单上层命令
并替换
local all postgres peer
到
local all postgres md5
我也在我的博客上写了一些步骤
http://tarungarg402.blogspot.in/2014/10/set-up-postgresql-on-ubuntu.html