title: FATAL: role "root" does not exist
body: <p>I trying to create rails application with postgresql database, but when I create database <code>rake db:migrate</code> bash show me an error </p>
  
  <pre><code>FATAL:  role "my" does not exist
  </code></pre>
  
  <p>how fix?</p>
  
  <p>sorry for my bad English</p>
  
  <p><strong>UPD</strong></p>
  
  <pre><code>my@my-P5K-SE ~/ror/timonin $ rake db:create
  FATAL:  role "my" does not exist
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:898:in `rescue in connect'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:888:in `connect'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:568:in `initialize'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:41:in `new'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:41:in `postgresql_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:435:in `new_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:445:in `checkout_new_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:416:in `acquire_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:351:in `block in checkout'
  /usr/local/rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:350:in `checkout'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in `block in connection'
  /usr/local/rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:264:in `connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:541:in `retrieve_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_handling.rb:113:in `retrieve_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_handling.rb:87:in `connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/postgresql_database_tasks.rb:8:in `connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/postgresql_database_tasks.rb:17:in `create'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:88:in `create'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:102:in `block in create_current'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:209:in `block in each_current_configuration'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:208:in `each'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:208:in `each_current_configuration'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:101:in `create_current'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/railties/databases.rake:17:in `block (2 levels) in &lt;top (required)&gt;'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:240:in `call'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:240:in `block in execute'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:235:in `each'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:235:in `execute'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain'
  /usr/local/rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:172:in `invoke_with_call_chain'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:165:in `invoke'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:150:in `invoke_task'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:106:in `block (2 levels) in top_level'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:106:in `each'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:106:in `block in top_level'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:115:in `run_with_threads'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:100:in `top_level'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:78:in `block in run'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:176:in `standard_exception_handling'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:75:in `run'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/bin/rake:33:in `&lt;top (required)&gt;'
  /usr/local/rvm/gems/ruby-2.1.3/bin/rake:23:in `load'
  /usr/local/rvm/gems/ruby-2.1.3/bin/rake:23:in `&lt;main&gt;'
  /usr/local/rvm/gems/ruby-2.1.3/bin/ruby_executable_hooks:15:in `eval'
  /usr/local/rvm/gems/ruby-2.1.3/bin/ruby_executable_hooks:15:in `&lt;main&gt;'
  Couldn't create database for {"adapter"=&gt;"postgresql", "encoding"=&gt;"unicode", "pool"=&gt;5, "database"=&gt;"timonin_development"}
  FATAL:  role "my" does not exist
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:898:in `rescue in connect'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:888:in `connect'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:568:in `initialize'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:41:in `new'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:41:in `postgresql_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:435:in `new_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:445:in `checkout_new_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:416:in `acquire_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:351:in `block in checkout'
  /usr/local/rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:350:in `checkout'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in `block in connection'
  /usr/local/rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:264:in `connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:541:in `retrieve_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_handling.rb:113:in `retrieve_connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/connection_handling.rb:87:in `connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/postgresql_database_tasks.rb:8:in `connection'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/postgresql_database_tasks.rb:17:in `create'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:88:in `create'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:102:in `block in create_current'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:209:in `block in each_current_configuration'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:208:in `each'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:208:in `each_current_configuration'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/tasks/database_tasks.rb:101:in `create_current'
  /usr/local/rvm/gems/ruby-2.1.3/gems/activerecord-4.1.4/lib/active_record/railties/databases.rake:17:in `block (2 levels) in &lt;top (required)&gt;'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:240:in `call'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:240:in `block in execute'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:235:in `each'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:235:in `execute'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain'
  /usr/local/rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:172:in `invoke_with_call_chain'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/task.rb:165:in `invoke'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:150:in `invoke_task'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:106:in `block (2 levels) in top_level'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:106:in `each'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:106:in `block in top_level'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:115:in `run_with_threads'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:100:in `top_level'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:78:in `block in run'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:176:in `standard_exception_handling'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/lib/rake/application.rb:75:in `run'
  /usr/local/rvm/gems/ruby-2.1.3/gems/rake-10.3.2/bin/rake:33:in `&lt;top (required)&gt;'
  /usr/local/rvm/gems/ruby-2.1.3/bin/rake:23:in `load'
  /usr/local/rvm/gems/ruby-2.1.3/bin/rake:23:in `&lt;main&gt;'
  /usr/local/rvm/gems/ruby-2.1.3/bin/ruby_executable_hooks:15:in `eval'
  /usr/local/rvm/gems/ruby-2.1.3/bin/ruby_executable_hooks:15:in `&lt;main&gt;'
  Couldn't create database for {"adapter"=&gt;"postgresql", "encoding"=&gt;"unicode", "pool"=&gt;5, "database"=&gt;"timonin_test"}
  </code></pre>
  
  <p>database.yml</p>
  
  <pre><code># PostgreSQL. Versions 8.2 and up are supported.
  #
  # Install the pg driver:
  #   gem install pg
  # On OS X with Homebrew:
  #   gem install pg -- --with-pg-config=/usr/local/bin/pg_config
  # On OS X with MacPorts:
  #   gem install pg -- --with-pg-config=/opt/local/lib/postgresql84/bin/pg_config
  # On Windows:
  #   gem install pg
  #       Choose the win32 build.
  #       Install PostgreSQL and put its /bin directory on your path.
  #
  # Configure Using Gemfile
  # gem 'pg'
  #
  default: &amp;default
    adapter: postgresql
    encoding: unicode
    # For details on connection pooling, see rails configuration guide
    # http://guides.rubyonrails.org/configuring.html#database-pooling
    pool: 5
  
  development:
    &lt;&lt;: *default
    database: timonin_development
  
    # The specified database role being used to connect to postgres.
    # To create additional roles in postgres see `$ createuser --help`.
    # When left blank, postgres will use the default role. This is
    # the same name as the operating system user that initialized the database.
    #username: timonin
  
    # The password associated with the postgres role (username).
    #password:
  
    # Connect on a TCP socket. Omitted by default since the client uses a
    # domain socket that doesn't need configuration. Windows does not have
    # domain sockets, so uncomment these lines.
    #host: localhost
  
    # The TCP port the server listens on. Defaults to 5432.
    # If your server runs on a different port number, change accordingly.
    #port: 5432
  
    # Schema search path. The server defaults to $user,public
    #schema_search_path: myapp,sharedapp,public
  
    # Minimum log levels, in increasing order:
    #   debug5, debug4, debug3, debug2, debug1,
    #   log, notice, warning, error, fatal, and panic
    # Defaults to warning.
    #min_messages: notice
  
  # Warning: The database defined as "test" will be erased and
  # re-generated from your development database when you run "rake".
  # Do not set this db to the same as development or production.
  test:
    &lt;&lt;: *default
    database: timonin_test
  
  # As with config/secrets.yml, you never want to store sensitive information,
  # like your database password, in your source code. If your source code is
  # ever seen by anyone, they now have access to your database.
  #
  # Instead, provide the password as a unix environment variable when you boot
  # the app. Read http://guides.rubyonrails.org/configuring.html#configuring-a-database
  # for a full rundown on how to provide these environment variables in a
  # production deployment.
  #
  # On Heroku and other platform providers, you may have a full connection URL
  # available as an environment variable. For example:
  #
  #   DATABASE_URL="postgres://myuser:mypass@localhost/somedatabase"
  #
  # You can use this database configuration with:
  #
  #   production:
  #     url: &lt;%= ENV['DATABASE_URL'] %&gt;
  #
  production:
    &lt;&lt;: *default
    database: timonin_production
    username: timonin
    password: &lt;%= ENV['TIMONIN_DATABASE_PASSWORD'] %&gt;
  </code></pre>