Error while running migration

[Virendra Negi]

Hello
I generate a scaffold for the User it created a migration for me for
user table
now when iam trying to run that migration its give me a error
a ran the migration command with --trace to crack down the source of
the error
but it should me this bunch of things and its not getting to my head


** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
rake aborted!
Unknown database '[my_database_name]_development'

/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/mysql_adapter.rb:576:in
`real_connect'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/mysql_adapter.rb:576:in
`connect'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/mysql_adapter.rb:204:in
`initialize'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/mysql_adapter.rb:76:in
`new'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/mysql_adapter.rb:76:in
`mysql_connection'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in
`send'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in
`new_connection'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:245:in
`checkout_new_connection'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:188:in
`checkout'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in
`loop'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in
`checkout'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/1.8/monitor.rb:238:in `synchronize'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:183:in
`checkout'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:98:in
`connection'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:326:in
`retrieve_connection'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:in
`retrieve_connection'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in
`connection'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/migration.rb:435:in
`initialize'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/migration.rb:400:in
`new'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/migration.rb:400:in
`up'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/migration.rb:383:in
`migrate'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/tasks/databases.rake:116
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:617:in
`call'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:617:in
`execute'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:612:in
`each'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:612:in
`execute'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:578:in
`invoke_with_call_chain'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/1.8/monitor.rb:238:in `synchronize'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:571:in
`invoke_with_call_chain'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:564:in
`invoke'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2027:in
`invoke_task'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in
`top_level'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in
`each'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in
`top_level'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2044:in
`standard_exception_handling'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:1999:in
`top_level'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:1977:in
`run'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:2044:in
`standard_exception_handling'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/lib/rake.rb:1974:in
`run'
/PROGRA~1/BITNAM~1/ruby/lib/ruby/gems/1.8/gems/rake-0.8.4/bin/rake:31
/PROGRA~1/BITNAM~1/ruby/bin/rake:19:in `load'
/PROGRA~1/BITNAM~1/ruby/bin/rake:


any idea
thank anyway

 

[Brian Candler]

Unknown database '[my_database_name]_development'

Read that error message - it tells you exactly the problem. Look also in
your config/database.yml.

But note that this is not the Rails mailing list, so you'd be better
posting any follow-up questions there.