如何使用PostgreSQL解决Rails中的错误’fe_sendauth：没有提供密

fe_sendauth: no password supplied

这是我一步一步的行动：

$sudo apt-get install postgresql postgresql-contrib
$gem install pg
$rails new timetracker --database=postgresql --skip-unit-test

我的database.yml文件如下所示：

default: &default
  adapter: postgresql
  encoding: unicode
  pool: 5
  host: localhost
  username: postgres
  password:

development:
  <<: *default
  database: timetracker_development

test:
  <<: *default
  database: timetracker_test

production:
  <<: *default
  database: timetracker_production

这是我的pg_hba.conf文件：

# Database administrative login by Unix domain socket
local   all             postgres                                peer

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     peer
# IPv4 local connections:
host    all             all             127.0.0.1/32            md5
# IPv6 local connections:
host    all             all             ::1/128                 md5

# modified by me.
host    all             all             127.0.0.1/32            trust

host    all             all             127.0.0.1/32            trust

host    all             all             ::1/128                 trust

所以,当我做rails服务器时,我得到了错误,然后这就是我通过这样做得到的：

$rails c
$ActiveRecord::Base.connection.instance_variable_get(:@config)

2.1.5 :001 > ActiveRecord::Base.connection.instance_variable_get(:@config)
PG::ConnectionBad: fe_sendauth: no password supplied

from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/postgresql_adapter.rb:655:in initialize' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/postgresql_adapter.rb:655:innew’ from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/postgresql_adapter.rb:655:in connect' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/postgresql_adapter.rb:242:ininitialize’ from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/postgresql_adapter.rb:44:in
new' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/postgresql_adapter.rb:44:in
postgresql_connection’ from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:438:in
new_connection' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:448:in
checkout_new_connection’ from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:422:in
acquire_connection' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:349:in
block in checkout’ from
/home/denis/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/monitor.rb:211:in
mon_synchronize' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:348:in
checkout’ from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:263:in
block in connection' from
/home/denis/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/monitor.rb:211:in
mon_synchronize’ from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:262:in
connection' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:571:in
retrieve_connection’ … 4 levels… from
/home/denis/.rvm/gems/ruby-2.1.5/gems/railties-4.2.3/lib/rails/commands/console.rb:9:in
start' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/railties-4.2.3/lib/rails/commands/commands_tasks.rb:68:in
console’ from
/home/denis/.rvm/gems/ruby-2.1.5/gems/railties-4.2.3/lib/rails/commands/commands_tasks.rb:39:in
run_command!' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/railties-4.2.3/lib/rails/commands.rb:17:in
‘ from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in require' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:inblock in require’ from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:240:in load_dependency' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:inrequire’ from /home/denis/WEB/Rails/timetracker/bin/rails:8:in <top
(required)>' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:inload’ from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:in block in load' from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:240:inload_dependency’ from
/home/denis/.rvm/gems/ruby-2.1.5/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:in load' from
/home/denis/.rvm/rubies/ruby-2.1.5/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:inrequire’ from
/home/denis/.rvm/rubies/ruby-2.1.5/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in require' from -e:1:in‘2.1.5 :002 >

我第一次使用postgresql,我想我只是做错了.

你能帮帮我吗？