我在远程机器上使用带有postgresql的rails。我根据要求编辑了database.yml文件。但是当我运行rake db：migrate时它显示密码失败..但是相同的密码与psql命令一起使用.. 运行rake db：migrate时的错误是：
root@vdimc04 My_Postgres]# rake db:migrate --trace
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke db:load_config (first_time)
** Execute db:load_config
** Execute db:migrate
rake aborted!
fe_sendauth: no password supplied
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:1208:in `initialize'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:1208:in `new'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:1208:in `connect'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:326:in `initialize'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `new'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `postgresql_connection'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:315:in `new_connection'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:325:in `checkout_new_connection'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:247:in `block (2 levels) in checkout'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `loop'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `block in checkout'
/usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:239:in `checkout'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:102:in `block in connection'
/usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:101:in `connection'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:410:in `retrieve_connection'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_specification.rb:171:in `retrieve_connection'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_specification.rb:145:in `connection'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/migration.rb:662:in `initialize'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/migration.rb:570:in `new'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/migration.rb:570:in `up'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/migration.rb:551:in `migrate'
/usr/local/rvm/gems/ruby-1.9.3-p327/gems/activerecord-3.2.9/lib/active_record/railties/databases.rake:179:in `block (2 levels) in <top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/task.rb:227:in `call'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/task.rb:227:in `block in execute'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/task.rb:222:in `each'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/task.rb:222:in `execute'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/task.rb:166:in `block in invoke_with_call_chain'
/usr/local/rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/task.rb:159:in `invoke_with_call_chain'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/task.rb:152:in `invoke'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/application.rb:141:in `invoke_task'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/application.rb:99:in `block (2 levels) in top_level'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/application.rb:99:in `each'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/application.rb:99:in `block in top_level'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/application.rb:108:in `run_with_threads'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/application.rb:93:in `top_level'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/application.rb:71:in `block in run'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/application.rb:158:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/lib/rake/application.rb:68:in `run'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/gems/rake-10.0.2/bin/rake:37:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/bin/rake:19:in `load'
/usr/local/rvm/gems/ruby-1.9.3-p327@global/bin/rake:19:in `<main>'
/usr/local/rvm/gems/ruby-1.9.3-p327/bin/ruby_noexec_wrapper:14:in `eval'
/usr/local/rvm/gems/ruby-1.9.3-p327/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => db:migrate
** my database.yml file**
development:
adapter: postgresql
encoding: unicode
database: db_pchamara
pool: 5
username: db_test_user
password: password
host: 192.168.1.101
port: 5432
test:
adapter: postgresql
encoding: unicode
database: db_pchamara_test
pool: 5
username: db_test_user
password: password
production:
adapter: postgresql
encoding: unicode
database: db_pchamara_production
pool: 5
username: db_test_user
password: password
答案 0 :(得分：0)
伙计们我回答了我的问题...
当我们使用rails命令（例如'rails new demo'）启动一个新项目时，我们必须包含'--database = postgresql'。然后只有pg gem会到达bundle。如果没有声明，pg gem将不会出现在bundle ..
我在database.yml文件中所做的也是正确的。那里的一切都很好...... 当我们将postgresql数据库用于rails时，我们必须对位于lib目录中的pg_hba.conf进行一些修改。
我在ip到TRUST之前做了一些修改，之前是md5 ..
我们可以同时使用TRUST和md5。
md5- requires a passowrd to connect to database
trust- not requires a password
这就是..因为ususe包括database.yml文件的密码。 现在服务器运行没有任何错误...
感谢帮助我解决这个问题的每个人