require 'active_record' db_namespace = namespace :db do task :load_config do ActiveRecord::Base.configurations = ActiveRecord::Tasks::DatabaseTasks.database_configuration || {} ActiveRecord::Migrator.migrations_paths = ActiveRecord::Tasks::DatabaseTasks.migrations_paths end namespace :create do task :all => :load_config do ActiveRecord::Tasks::DatabaseTasks.create_all end end desc 'Creates the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:create:all to create all databases in the config). Without RAILS_ENV it defaults to creating the development and test databases.' task :create => [:load_config] do ActiveRecord::Tasks::DatabaseTasks.create_current end namespace :drop do task :all => :load_config do ActiveRecord::Tasks::DatabaseTasks.drop_all end end desc 'Drops the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:drop:all to drop all databases in the config). Without RAILS_ENV it defaults to dropping the development and test databases.' task :drop => [:load_config] do ActiveRecord::Tasks::DatabaseTasks.drop_current end desc "Migrate the database (options: VERSION=x, VERBOSE=false, SCOPE=blog)." task :migrate => [:environment, :load_config] do ActiveRecord::Migration.verbose = ENV["VERBOSE"] ? ENV["VERBOSE"] == "true" : true ActiveRecord::Migrator.migrate(ActiveRecord::Migrator.migrations_paths, ENV["VERSION"] ? ENV["VERSION"].to_i : nil) do |migration| ENV["SCOPE"].blank? || (ENV["SCOPE"] == migration.scope) end db_namespace['_dump'].invoke if ActiveRecord::Base.dump_schema_after_migration end task :_dump do case ActiveRecord::Base.schema_format when :ruby then db_namespace["schema:dump"].invoke when :sql then db_namespace["structure:dump"].invoke else raise "unknown schema format #{ActiveRecord::Base.schema_format}" end # Allow this task to be called as many times as required. An example is the # migrate:redo task, which calls other two internally that depend on this one. db_namespace['_dump'].reenable end namespace :migrate do # desc 'Rollbacks the database one migration and re migrate up (options: STEP=x, VERSION=x).' task :redo => [:environment, :load_config] do if ENV['VERSION'] db_namespace['migrate:down'].invoke db_namespace['migrate:up'].invoke else db_namespace['rollback'].invoke db_namespace['migrate'].invoke end end # desc 'Resets your database using your migrations for the current environment' task :reset => ['db:drop', 'db:create', 'db:migrate'] # desc 'Runs the "up" for a given migration VERSION.' task :up => [:environment, :load_config] do version = ENV['VERSION'] ? ENV['VERSION'].to_i : nil raise 'VERSION is required' unless version ActiveRecord::Migrator.run(:up, ActiveRecord::Migrator.migrations_paths, version) db_namespace['_dump'].invoke end # desc 'Runs the "down" for a given migration VERSION.' task :down => [:environment, :load_config] do version = ENV['VERSION'] ? ENV['VERSION'].to_i : nil raise 'VERSION is required - To go down one migration, run db:rollback' unless version ActiveRecord::Migrator.run(:down, ActiveRecord::Migrator.migrations_paths, version) db_namespace['_dump'].invoke end desc 'Display status of migrations' task :status => [:environment, :load_config] do unless ActiveRecord::Base.connection.table_exists?(ActiveRecord::Migrator.schema_migrations_table_name) puts 'Schema migrations table does not exist yet.' next # means "return" for rake task end db_list = ActiveRecord::Base.connection.select_values("SELECT version FROM #{ActiveRecord::Migrator.schema_migrations_table_name}") db_list.map! { |version| "%.3d" % version } file_list = [] ActiveRecord::Migrator.migrations_paths.each do |path| Dir.foreach(path) do |file| # match "20091231235959_some_name.rb" and "001_some_name.rb" pattern if match_data = /^(\d{3,})_(.+)\.rb$/.match(file) status = db_list.delete(match_data[1]) ? 'up' : 'down' file_list << [status, match_data[1], match_data[2].humanize] end end end db_list.map! do |version| ['up', version, '********** NO FILE **********'] end # output puts "\ndatabase: #{ActiveRecord::Base.connection_config[:database]}\n\n" puts "#{'Status'.center(8)} #{'Migration ID'.ljust(14)} Migration Name" puts "-" * 50 (db_list + file_list).sort_by {|migration| migration[1]}.each do |migration| puts "#{migration[0].center(8)} #{migration[1].ljust(14)} #{migration[2]}" end puts end end desc 'Rolls the schema back to the previous version (specify steps w/ STEP=n).' task :rollback => [:environment, :load_config] do step = ENV['STEP'] ? ENV['STEP'].to_i : 1 ActiveRecord::Migrator.rollback(ActiveRecord::Migrator.migrations_paths, step) db_namespace['_dump'].invoke end # desc 'Pushes the schema to the next version (specify steps w/ STEP=n).' task :forward => [:environment, :load_config] do step = ENV['STEP'] ? ENV['STEP'].to_i : 1 ActiveRecord::Migrator.forward(ActiveRecord::Migrator.migrations_paths, step) db_namespace['_dump'].invoke end # desc 'Drops and recreates the database from db/schema.rb for the current environment and loads the seeds.' task :reset => [:environment, :load_config] do db_namespace["drop"].invoke db_namespace["setup"].invoke end # desc "Retrieves the charset for the current environment's database" task :charset => [:environment, :load_config] do puts ActiveRecord::Tasks::DatabaseTasks.charset_current end # desc "Retrieves the collation for the current environment's database" task :collation => [:environment, :load_config] do begin puts ActiveRecord::Tasks::DatabaseTasks.collation_current rescue NoMethodError $stderr.puts 'Sorry, your database adapter is not supported yet. Feel free to submit a patch.' end end desc 'Retrieves the current schema version number' task :version => [:environment, :load_config] do puts "Current version: #{ActiveRecord::Migrator.current_version}" end # desc "Raises an error if there are pending migrations" task :abort_if_pending_migrations => :environment do pending_migrations = ActiveRecord::Migrator.open(ActiveRecord::Migrator.migrations_paths).pending_migrations if pending_migrations.any? puts "You have #{pending_migrations.size} pending #{pending_migrations.size > 1 ? 'migrations:' : 'migration:'}" pending_migrations.each do |pending_migration| puts ' %4d %s' % [pending_migration.version, pending_migration.name] end abort %{Run `rake db:migrate` to update your database then try again.} end end desc 'Create the database, load the schema, and initialize with the seed data (use db:reset to also drop the database first)' task :setup => ['db:schema:load_if_ruby', 'db:structure:load_if_sql', :seed] desc 'Load the seed data from db/seeds.rb' task :seed do db_namespace['abort_if_pending_migrations'].invoke ActiveRecord::Tasks::DatabaseTasks.load_seed end namespace :fixtures do desc "Load fixtures into the current environment's database. Load specific fixtures using FIXTURES=x,y. Load from subdirectory in test/fixtures using FIXTURES_DIR=z. Specify an alternative path (eg. spec/fixtures) using FIXTURES_PATH=spec/fixtures." task :load => [:environment, :load_config] do require 'active_record/fixtures' base_dir = if ENV['FIXTURES_PATH'] File.join [Rails.root, ENV['FIXTURES_PATH'] || %w{test fixtures}].flatten else ActiveRecord::Tasks::DatabaseTasks.fixtures_path end fixtures_dir = File.join [base_dir, ENV['FIXTURES_DIR']].compact (ENV['FIXTURES'] ? ENV['FIXTURES'].split(',') : Dir["#{fixtures_dir}/**/*.yml"].map {|f| f[(fixtures_dir.size + 1)..-5] }).each do |fixture_file| ActiveRecord::FixtureSet.create_fixtures(fixtures_dir, fixture_file) end end # desc "Search for a fixture given a LABEL or ID. Specify an alternative path (eg. spec/fixtures) using FIXTURES_PATH=spec/fixtures." task :identify => [:environment, :load_config] do require 'active_record/fixtures' label, id = ENV['LABEL'], ENV['ID'] raise 'LABEL or ID required' if label.blank? && id.blank? puts %Q(The fixture ID for "#{label}" is #{ActiveRecord::FixtureSet.identify(label)}.) if label base_dir = if ENV['FIXTURES_PATH'] File.join [Rails.root, ENV['FIXTURES_PATH'] || %w{test fixtures}].flatten else ActiveRecord::Tasks::DatabaseTasks.fixtures_path end Dir["#{base_dir}/**/*.yml"].each do |file| if data = YAML::load(ERB.new(IO.read(file)).result) data.keys.each do |key| key_id = ActiveRecord::FixtureSet.identify(key) if key == label || key_id == id.to_i puts "#{file}: #{key} (#{key_id})" end end end end end end namespace :schema do desc 'Create a db/schema.rb file that is portable against any DB supported by AR' task :dump => [:environment, :load_config] do require 'active_record/schema_dumper' filename = ENV['SCHEMA'] || File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, 'schema.rb') File.open(filename, "w:utf-8") do |file| ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, file) end db_namespace['schema:dump'].reenable end desc 'Load a schema.rb file into the database' task :load => [:environment, :load_config] do ActiveRecord::Tasks::DatabaseTasks.load_schema(:ruby, ENV['SCHEMA']) end task :load_if_ruby => ['db:create', :environment] do db_namespace["schema:load"].invoke if ActiveRecord::Base.schema_format == :ruby end namespace :cache do desc 'Create a db/schema_cache.dump file.' task :dump => [:environment, :load_config] do con = ActiveRecord::Base.connection filename = File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "schema_cache.dump") con.schema_cache.clear! con.tables.each { |table| con.schema_cache.add(table) } open(filename, 'wb') { |f| f.write(Marshal.dump(con.schema_cache)) } end desc 'Clear a db/schema_cache.dump file.' task :clear => [:environment, :load_config] do filename = File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "schema_cache.dump") FileUtils.rm(filename) if File.exist?(filename) end end end namespace :structure do desc 'Dump the database structure to db/structure.sql. Specify another file with DB_STRUCTURE=db/my_structure.sql' task :dump => [:environment, :load_config] do filename = ENV['DB_STRUCTURE'] || File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "structure.sql") current_config = ActiveRecord::Tasks::DatabaseTasks.current_config ActiveRecord::Tasks::DatabaseTasks.structure_dump(current_config, filename) if ActiveRecord::Base.connection.supports_migrations? && ActiveRecord::SchemaMigration.table_exists? File.open(filename, "a") do |f| f.puts ActiveRecord::Base.connection.dump_schema_information f.print "\n" end end db_namespace['structure:dump'].reenable end # desc "Recreate the databases from the structure.sql file" task :load => [:environment, :load_config] do ActiveRecord::Tasks::DatabaseTasks.load_schema(:sql, ENV['DB_STRUCTURE']) end task :load_if_sql => ['db:create', :environment] do db_namespace["structure:load"].invoke if ActiveRecord::Base.schema_format == :sql end end namespace :test do task :deprecated do Rake.application.top_level_tasks.grep(/^db:test:/).each do |task| $stderr.puts "WARNING: #{task} is deprecated. The Rails test helper now maintains " \ "your test schema automatically, see the release notes for details." end end # desc "Recreate the test database from the current schema" task :load => %w(db:test:deprecated db:test:purge) do case ActiveRecord::Base.schema_format when :ruby db_namespace["test:load_schema"].invoke when :sql db_namespace["test:load_structure"].invoke end end # desc "Recreate the test database from an existent schema.rb file" task :load_schema => %w(db:test:deprecated db:test:purge) do begin should_reconnect = ActiveRecord::Base.connection_pool.active_connection? ActiveRecord::Base.establish_connection(ActiveRecord::Base.configurations['test']) ActiveRecord::Schema.verbose = false db_namespace["schema:load"].invoke ensure if should_reconnect ActiveRecord::Base.establish_connection(ActiveRecord::Base.configurations[ActiveRecord::Tasks::DatabaseTasks.env]) end end end # desc "Recreate the test database from an existent structure.sql file" task :load_structure => %w(db:test:deprecated db:test:purge) do begin ActiveRecord::Tasks::DatabaseTasks.current_config(:config => ActiveRecord::Base.configurations['test']) db_namespace["structure:load"].invoke ensure ActiveRecord::Tasks::DatabaseTasks.current_config(:config => nil) end end # desc "Recreate the test database from a fresh schema" task :clone => %w(db:test:deprecated environment) do case ActiveRecord::Base.schema_format when :ruby db_namespace["test:clone_schema"].invoke when :sql db_namespace["test:clone_structure"].invoke end end # desc "Recreate the test database from a fresh schema.rb file" task :clone_schema => %w(db:test:deprecated db:schema:dump db:test:load_schema) # desc "Recreate the test database from a fresh structure.sql file" task :clone_structure => %w(db:test:deprecated db:structure:dump db:test:load_structure) # desc "Empty the test database" task :purge => %w(db:test:deprecated environment load_config) do ActiveRecord::Tasks::DatabaseTasks.purge ActiveRecord::Base.configurations['test'] end # desc 'Check for pending migrations and load the test schema' task :prepare => %w(db:test:deprecated environment load_config) do unless ActiveRecord::Base.configurations.blank? db_namespace['test:load'].invoke end end end end namespace :railties do namespace :install do # desc "Copies missing migrations from Railties (e.g. engines). You can specify Railties to use with FROM=railtie1,railtie2" task :migrations => :'db:load_config' do to_load = ENV['FROM'].blank? ? :all : ENV['FROM'].split(",").map {|n| n.strip } railties = {} Rails.application.railties.each do |railtie| next unless to_load == :all || to_load.include?(railtie.railtie_name) if railtie.respond_to?(:paths) && (path = railtie.paths['db/migrate'].first) railties[railtie.railtie_name] = path end end on_skip = Proc.new do |name, migration| puts "NOTE: Migration #{migration.basename} from #{name} has been skipped. Migration with the same name already exists." end on_copy = Proc.new do |name, migration| puts "Copied migration #{migration.basename} from #{name}" end ActiveRecord::Migration.copy(ActiveRecord::Migrator.migrations_paths.first, railties, :on_skip => on_skip, :on_copy => on_copy) end end end