Rake: Ruby make.
#---------- -W, --where [PATTERN] # To find where the rake commands come from: # http://stackoverflow.com/questions/4742930/where-are-rake-tasks-defined rake -W db:create # rake db:create /Users/me/.rvm/gems/[email protected]/gems/activerecord-18.104.22.168/lib/active_record/railties/databases.rake:16:in `block in <top (required)>' # rake db:create:all /Users/me/.rvm/gems/[email protected]/gems/activerecord-22.214.171.124/lib/active_record/railties/databases.rake:10:in `block (2 levels) in <top (required)>' # rake db:create_dev_company[domain] /Users/me/works/proj/lib/tasks/populate.rake:32:in `block in <top (required)>' # rake db:create_scim_dev_company /Users/me/works/proj/lib/tasks/populate.rake:15:in `block in <top (required)>' # It can also list all the tasks rake -W db:test #---------- Others -T, --tasks [PATTERN] For example: bundle exec rake -T seed -N, --no-search, --nosearch Do not search parent directories for the Rakefile. -P, --prereqs Display the tasks and dependencies, then exit. -n, --dry-run Do a dry run without executing actions. -t, --trace=[OUT] Turn on invoke/execute tracing, enable full backtrace. OUT can be stderr (default) or stdout. -q, --quiet Do not log messages to standard output. -s, --silent Like --quiet, but also suppresses the 'in directory' announcement. -v, --verbose Log message to standard output. -V, --version Display the program version. -h, -H, --help
# Drop the test table: RAILS_ENV=test rake db:drop # Create a new test table: RAILS_ENV=test rake db:create # Or create all: # rake db:create:all # Regenerate the test db: # http://stackoverflow.com/questions/18636800/i-get-a-database-does-not-exist-error-when-running-unit-tests rake db:test:prepare # Or # rake db:test:prepare_with_migrate # Load seed bundle exec rake db:seed # Load fixtures into test RAILS_ENV=test bundle exec rake db:fixtures:load #---------- All db tasks db:create Creates the database for the current RAILS_ENV environment. If RAILS_ENV is not specified it defaults to the development and test databases. db:create:all Creates the database for all environments. db:drop Drops the database for the current RAILS_ENV environment. If RAILS_ENV is not specified it defaults to the development and test databases. db:drop:all Drops the database for all environments. db:migrate Runs migrations for the current environment that have not run yet. By default it will run migrations only in the development environment. db:migrate:redo Runs db:migrate:down and db:migrate:up or db:migrate:rollback and db:migrate:up depending on the specified migration. I usually run this after creating and running a new migration to ensure the migration is reversable. db:migrate:up Runs the up for the given migration VERSION. db:migrate:down Runs the down for the given migration VERSION. db:migrate:status Displays the current migration status. db:migrate:rollback Rolls back the last migration. db:version Prints the current schema version. db:forward Pushes the schema to the next version. db:seed Runs the db/seeds.rb file. db:schema:load Loads the schema into the current environment’s database. db:schema:dump Dumps the current environment’s schema to db/schema.rb. db:setup Runs db:create, db:schema:load and db:seed. db:reset Runs db:drop and db:setup. db:migrate:reset Runs db:drop, db:create and db:migrate. db:test:prepare Check for pending migrations and load the test schema. (If you run rake without any arguments it will do this by default.) db:test:clone Recreate the test database from the current environment’s database schema. db:test:clone_structure Similar to db:test:clone, but it will ensure that your test database has the same structure, including charsets and collations, as your current environment’s database. db:environment:set Set the current RAILS_ENV environment in the ar_internal_metadata table. (Used as part of the protected environment check.) db:check_protected_environments Checks if a destructive action can be performed in the current RAILS_ENV environment. Used internally when running a destructive action such as db:drop or db:schema:load. #---------- db reset # When working on a Rails app, you might sometimes need to drop the local database and start fresh with data loaded from db/seeds.rb, what do you do? # Short answer: use rake db:reset. This drops the database, then loads the schema with rake db:schema:load and then seeds the data with rake db:seed. This is what you should be using for the vast majority of cases. # However, during very early stages of development, I often edit the existing migration files instead of creating new ones. This is useful when I’m still figuring out the schema, and often need to add fields to existing models. # In such cases, we need to run db:migrate instead of db:schema:load when we reset the database. For this, we create a new task, db:reseed. # NOTE: Once you’ve got the app in production or in team work, you should definitely not be editing migration files. # lib/tasks/db.rake namespace :db do desc 'Drop, create, migrate then seed the development database' task reseed: [ 'db:drop', 'db:create', 'db:migrate', 'db:seed' ] do puts 'Reseeding completed.' end end
RAILS_ENV=production rake about # Create a secret_key that you can add to config/secrets.yml RAILS_ENV=production rake secret RAILS_ENV=production rake db:migrate # Push js, css, image files into the /public folder RAILS_ENV=production rake assets:precompile RAILS_ENV=production rails s # Or rails s -e production
# Use "schema_migrations" table to decide which migration to run: rake db:migrate rake db:migrate:status # Bring down/up specific migration. # http://stackoverflow.com/questions/753919/run-a-single-migration-file rake db:migrate:down VERSION=20090408054532 rake db:migrate:up VERSION=20090408054532 # https://rubyinrails.com/2014/01/03/rake-db-migrate-with-down-up-redo-rollback-options/ # This will first run down part and then up part of the migration having version: rake db:migrate:redo VERSION=20130717110623 # This will rollback last run migration(i.e. Default STEP=1) rake db:rollback # Rollback last n migrations rake db:rollback STEP=4