Why is rake db:migrate:reset not listed in rake -T?

Question

Why are some rake tasks not listed by rake -T? Like db:migrate:reset? I can execute it without a problem, but why is it not listed there? Is there a way to get a real full list of rake tasks?

 % rake -T (in /home/zeus/projects/my_project) rake about              # List versions of all Rails frameworks and the environment rake db:create          # Create the database from config/database.yml for the current Rails.env (use db:create:all to create all dbs in the config) rake db:drop            # Drops the database for the current Rails.env (use db:drop:all to drop all databases) rake db:fixtures:load   # Load fixtures into the current environment's database. rake db:migrate         # Migrate the database (options: VERSION=x, VERBOSE=false). rake db:migrate:status  # Display status of migrations rake db:rollback        # Rolls the schema back to the previous version (specify steps w/ STEP=n). rake db:schema:dump     # Create a db/schema.rb file that can be portably used against any DB supported by AR rake db:schema:load     # Load a schema.rb file into the database rake db:seed            # Load the seed data from db/seeds.rb rake db:setup           # Create the database, load the schema, and initialize with the seed data (use db:reset to also drop the db first) rake db:structure:dump  # Dump the database structure to an SQL file rake db:version         # Retrieves the current schema version number rake doc:app            # Generate docs for the app -- also availble doc:rails, doc:guides, doc:plugins (options: TEMPLATE=/rdoc-template.rb, TITLE="Custom Title") rake erd                # Generate an Entity-Relationship Diagram based on your models rake log:clear          # Truncates all *.log files in log/ to zero bytes rake middleware         # Prints out your Rack middleware stack rake notes              # Enumerate all annotations (use notes:optimize, :fixme, :todo for focus) rake notes:custom       # Enumerate a custom annotation, specify with ANNOTATION=CUSTOM rake rails:template     # Applies the template supplied by LOCATION=/path/to/template rake rails:update       # Update both configs and public/javascripts from Rails (or use just update:javascripts or update:configs) rake routes             # Print out all defined routes in match order, with names. rake secret             # Generate a crytographically secure secret key (this is typically used to generate a secret for cookie sessions). rake spec               # Run all specs in spec directory (excluding plugin specs) rake spec:acceptance    # Run the code examples in spec/acceptance rake spec:controllers   # Run the code examples in spec/controllers rake spec:helpers       # Run the code examples in spec/helpers rake spec:lib           # Run the code examples in spec/lib rake spec:mailers       # Run the code examples in spec/mailers rake spec:models        # Run the code examples in spec/models rake spec:rcov          # Run all specs with rcov rake spec:requests      # Run the code examples in spec/requests rake spec:routing       # Run the code examples in spec/routing rake spec:views         # Run the code examples in spec/views rake stats              # Report code statistics (KLOCs, etc) from the application rake test               # Runs test:units, test:functionals, test:integration together (also available: test:benchmark, test:profile, test:plugins) rake test:recent        # Run tests for recenttest:prepare / Test recent changes rake test:uncommitted   # Run tests for uncommittedtest:prepare / Test changes since last checkin (only Subversion and Git) rake time:zones:all     # Displays all time zones, also available: time:zones:us, time:zones:local -- filter with OFFSET parameter, e.g., OFFSET=-6 rake tmp:clear          # Clear session, cache, and socket files from tmp/ (narrow w/ tmp:sessions:clear, tmp:cache:clear, tmp:sockets:clear) rake tmp:create         # Creates tmp directories for sessions, cache, sockets, and pids 

Answer 1

Tasks that don't have a description will not show up.

EDIT: Looks like DHH removed the description from Rails 3 for a few tasks to 'cut down on noise'. rake db:setup has a note about db:reset though.

http://github.com/rails/rails/commit/983815632cc1d316c7c803a47be28f1abe6698fb

Answer 2

You can also use rake db -T -A to show all tasks, even uncommented ones. For reference these switches are doing the following:

-T, --tasks [PATTERN]    Display the tasks (matching optional PATTERN) with                           descriptions, then exit. -A, --all                Show all tasks, even uncommented ones (in combination                           with -T or -D)