ruby on rails - (postgreSQL error) FATAL: role "demo" does not exist (PG::Error) -

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so i've installed postgresql homebrew , have initialized new demo_app the: rails new demo_app -d postgresql command.

albeit, getting following error when starting server rails s.

snippit:

/usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:1216:in `initialize': fatal:  role "demo" not exist (pg::error)

full log:

/usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:1216:in `initialize': fatal:  role "demo" not exist (pg::error)     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:1216:in `new'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:1216:in `connect'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:324:in `initialize'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `new'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `postgresql_connection'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:315:in `new_connection'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:325:in `checkout_new_connection'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:247:in `block (2 levels) in checkout'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `loop'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `block in checkout'     /usr/local/rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:239:in `checkout'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:102:in `block in connection'     /usr/local/rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:101:in `connection'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:410:in `retrieve_connection'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:171:in `retrieve_connection'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:145:in `connection'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.13/lib/active_record/railtie.rb:88:in `block in <class:railtie>'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `instance_exec'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `run'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/initializable.rb:55:in `block in run_initializers'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `each'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `run_initializers'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/application.rb:136:in `initialize!'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/railtie/configurable.rb:30:in `method_missing'     /users/anthonypanepinto/sites/new_demo/demo/config/environment.rb:5:in `<top (required)>'     /users/anthonypanepinto/sites/new_demo/demo/config.ru:3:in `require'     /users/anthonypanepinto/sites/new_demo/demo/config.ru:3:in `block in <main>'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'     /users/anthonypanepinto/sites/new_demo/demo/config.ru:in `new'     /users/anthonypanepinto/sites/new_demo/demo/config.ru:in `<main>'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.5/lib/rack/server.rb:200:in `app'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/commands/server.rb:46:in `app'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.5/lib/rack/server.rb:304:in `wrapped_app'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.5/lib/rack/server.rb:254:in `start'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/commands/server.rb:70:in `start'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/commands.rb:55:in `block in <top (required)>'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/commands.rb:50:in `tap'     /usr/local/rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.13/lib/rails/commands.rb:50:in `<top (required)>'     script/rails:6:in `require'     script/rails:6:in `<main>'

when create rails app, must create database postgres works.

createdb demo

and check config/database.yml


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