Rake doesn't know how to build 'db_schema_dump'

rubyonrails-talk
1

Alright, I'm a complete newbie at rails. I have over 4 years experience and php and figured I would try my hand at rails. So I'm following the 'Migration tutorial' from the RoR homepage. I'm trying to build a Sqlite3 database using the Sqlite3 gem.

Database.yml:

development:   adapter: sqlite3   database: db/development.sqlite3   timeout: 5000

test:   adapter: sqlite3   database: db/test.sqlite3   timeout: 5000

production:   development

Outputs

C:\ruby\blog\db>rake db_schema_dump (in C:/ruby/blog) rake aborted! Don't know how to build task 'db_schema_dump'

(See full trace by running task with --trace)

C:\ruby\blog\db>rake db_schema_dump --trace (in C:/ruby/blog) rake aborted! Don't know how to build task 'db_schema_dump' c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1472:in `' c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1739:in `top_level' c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1739:in `each' c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1739:in `top_level' c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1761:in `standard_exceptio n_handling' c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1733:in `top_level' c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1711:in `run' c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1761:in `standard_exceptio n_handling' c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1708:in `run' c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/bin/rake:7 c:/ruby/bin/rake:16:in `load' c:/ruby/bin/rake:16

Any help is greatly appreciated.

2

C:\ruby\blog\db>rake db_schema_dump (in C:/ruby/blog) rake aborted! Don't know how to build task 'db_schema_dump'

Rake tasks can now have namespaces and rails uses them. It looks like the tutorial assumes a prior version of rails before rake namespaces existed. You probably need:

rake db:schema:dump

You can get a full list of rake tasks available, but running:

rake -T

Hope that helps, Jordan