require "active_record" db_namespace = namespace :db do desc "Set the environment value for the database" task "environment:set" => [:environment, :load_config] do ActiveRecord::InternalMetadata.create_table ActiveRecord::InternalMetadata[:environment] = ActiveRecord::Migrator.current_environment end task check_protected_environments: [:environment, :load_config] do ActiveRecord::Tasks::DatabaseTasks.check_protected_environments! end 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 or when RAILS_ENV is development, 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, :check_protected_environments] 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 or when RAILS_ENV is development, it defaults to dropping the development and test databases." task drop: [:load_config, :check_protected_environments] do db_namespace["drop:_unsafe"].invoke end task "drop:_unsafe" => [:load_config] do ActiveRecord::Tasks::DatabaseTasks.drop_current end namespace :purge do task all: [:load_config, :check_protected_environments] do ActiveRecord::Tasks::DatabaseTasks.purge_all end end # desc "Empty the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:purge:all to purge all databases in the config). Without RAILS_ENV it defaults to purging the development and test databases." task purge: [:load_config, :check_protected_environments] do ActiveRecord::Tasks::DatabaseTasks.purge_current end desc "Migrate the database (options: VERSION=x, VERBOSE=false, SCOPE=blog)." task migrate: [:environment, :load_config] do ActiveRecord::Tasks::DatabaseTasks.migrate db_namespace["_dump"].invoke end # IMPORTANT: This task won't dump the schema if ActiveRecord::Base.dump_schema_after_migration is set to false task :_dump do if ActiveRecord::Base.dump_schema_after_migration 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 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::Tasks::DatabaseTasks.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::Tasks::DatabaseTasks.migrations_paths, version) db_namespace["_dump"].invoke end desc "Display status of migrations" task status: [:environment, :load_config] do unless ActiveRecord::SchemaMigration.table_exists? abort "Schema migrations table does not exist yet." end # output puts "\ndatabase: #{ActiveRecord::Base.connection_config[:database]}\n\n" puts "#{'Status'.center(8)} #{'Migration ID'.ljust(14)} Migration Name" puts "-" * 50 paths = ActiveRecord::Tasks::DatabaseTasks.migrations_paths ActiveRecord::Migrator.migrations_status(paths).each do |status, version, name| puts "#{status.center(8)} #{version.ljust(14)} #{name}" 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::Tasks::DatabaseTasks.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::Tasks::DatabaseTasks.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: [ "db:drop", "db:setup" ] # 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, :load_config] do pending_migrations = ActiveRecord::Migrator.open(ActiveRecord::Tasks::DatabaseTasks.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 `rails db:migrate` to update your database then try again.} end end desc "Creates the database, loads the schema, and initializes 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 "Loads 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 "Loads 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 = ActiveRecord::Tasks::DatabaseTasks.fixtures_path fixtures_dir = if ENV["FIXTURES_DIR"] File.join base_dir, ENV["FIXTURES_DIR"] else base_dir end fixture_files = if ENV["FIXTURES"] ENV["FIXTURES"].split(",") else # The use of String#[] here is to support namespaced fixtures. Dir["#{fixtures_dir}/**/*.yml"].map { |f| f[(fixtures_dir.size + 1)..-5] } end ActiveRecord::FixtureSet.create_fixtures(fixtures_dir, fixture_files) 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 = ActiveRecord::Tasks::DatabaseTasks.fixtures_path Dir["#{base_dir}/**/*.yml"].each do |file| if data = YAML::load(ERB.new(IO.read(file)).result) data.each_key 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 "Creates a db/schema.rb file that is portable against any DB supported by Active Record" 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 "Loads a schema.rb file into the database" task load: [:environment, :load_config, :check_protected_environments] do ActiveRecord::Tasks::DatabaseTasks.load_schema_current(: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 "Creates a db/schema_cache.yml file." task dump: [:environment, :load_config] do conn = ActiveRecord::Base.connection filename = File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "schema_cache.yml") ActiveRecord::Tasks::DatabaseTasks.dump_schema_cache(conn, filename) end desc "Clears a db/schema_cache.yml file." task clear: [:environment, :load_config] do filename = File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "schema_cache.yml") rm_f filename, verbose: false end end end namespace :structure do desc "Dumps the database structure to db/structure.sql. Specify another file with SCHEMA=db/my_structure.sql" task dump: [:environment, :load_config] do filename = ENV["SCHEMA"] || 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::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 "Recreates the databases from the structure.sql file" task load: [:environment, :load_config, :check_protected_environments] do ActiveRecord::Tasks::DatabaseTasks.load_schema_current(:sql, ENV["SCHEMA"]) 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 # desc "Recreate the test database from the current schema" task load: %w(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:purge) do begin should_reconnect = ActiveRecord::Base.connection_pool.active_connection? ActiveRecord::Schema.verbose = false ActiveRecord::Tasks::DatabaseTasks.load_schema ActiveRecord::Base.configurations["test"], :ruby, ENV["SCHEMA"] 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:purge) do ActiveRecord::Tasks::DatabaseTasks.load_schema ActiveRecord::Base.configurations["test"], :sql, ENV["SCHEMA"] end # desc "Empty the test database" task purge: %w(environment load_config check_protected_environments) do ActiveRecord::Tasks::DatabaseTasks.purge ActiveRecord::Base.configurations["test"] end # desc 'Load the test schema' task prepare: %w(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(&:strip) railties = {} Rails.application.migration_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::Tasks::DatabaseTasks.migrations_paths.first, railties, on_skip: on_skip, on_copy: on_copy) end end end