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databases.rake file with patch applied for supporting create and drop db operations for ibm_db adapter

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databases.rake
Ruby
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require 'active_support/core_ext/object/inclusion'
 
db_namespace = namespace :db do
task :load_config => :rails_env do
require 'active_record'
ActiveRecord::Base.configurations = Rails.application.config.database_configuration
ActiveRecord::Migrator.migrations_paths = Rails.application.paths['db/migrate'].to_a
 
if defined?(ENGINE_PATH) && engine = Rails::Engine.find(ENGINE_PATH)
if engine.paths['db/migrate'].existent
ActiveRecord::Migrator.migrations_paths += engine.paths['db/migrate'].to_a
end
end
end
 
namespace :create do
# desc 'Create all the local databases defined in config/database.yml'
task :all => :load_config do
ActiveRecord::Base.configurations.each_value do |config|
# Skip entries that don't have a database key, such as the first entry here:
#
# defaults: &defaults
# adapter: mysql
# username: root
# password:
# host: localhost
#
# development:
# database: blog_development
# <<: *defaults
next unless config['database']
# Only connect to local databases
local_database?(config) { create_database(config) }
end
end
end
 
desc 'Create the database from config/database.yml for the current Rails.env (use db:create:all to create all dbs in the config)'
task :create => :load_config do
# Make the test database at the same time as the development one, if it exists
if Rails.env.development? && ActiveRecord::Base.configurations['test']
create_database(ActiveRecord::Base.configurations['test'])
end
create_database(ActiveRecord::Base.configurations[Rails.env])
end
 
def mysql_creation_options(config)
@charset = ENV['CHARSET'] || 'utf8'
@collation = ENV['COLLATION'] || 'utf8_unicode_ci'
{:charset => (config['charset'] || @charset), :collation => (config['collation'] || @collation)}
end
 
def create_database(config)
begin
if config['adapter'] =~ /sqlite/
if File.exist?(config['database'])
$stderr.puts "#{config['database']} already exists"
else
begin
# Create the SQLite database
ActiveRecord::Base.establish_connection(config)
ActiveRecord::Base.connection
rescue Exception => e
$stderr.puts e, *(e.backtrace)
$stderr.puts "Couldn't create database for #{config.inspect}"
end
end
return # Skip the else clause of begin/rescue
else
ActiveRecord::Base.establish_connection(config)
ActiveRecord::Base.connection
end
rescue
case config['adapter']
when /mysql/
if config['adapter'] =~ /jdbc/
#FIXME After Jdbcmysql gives this class
require 'active_record/railties/jdbcmysql_error'
error_class = ArJdbcMySQL::Error
else
error_class = config['adapter'] =~ /mysql2/ ? Mysql2::Error : Mysql::Error
end
access_denied_error = 1045
begin
ActiveRecord::Base.establish_connection(config.merge('database' => nil))
ActiveRecord::Base.connection.create_database(config['database'], mysql_creation_options(config))
ActiveRecord::Base.establish_connection(config)
rescue error_class => sqlerr
if sqlerr.errno == access_denied_error
print "#{sqlerr.error}. \nPlease provide the root password for your mysql installation\n>"
root_password = $stdin.gets.strip
grant_statement = "GRANT ALL PRIVILEGES ON #{config['database']}.* " \
"TO '#{config['username']}'@'localhost' " \
"IDENTIFIED BY '#{config['password']}' WITH GRANT OPTION;"
ActiveRecord::Base.establish_connection(config.merge(
'database' => nil, 'username' => 'root', 'password' => root_password))
ActiveRecord::Base.connection.create_database(config['database'], mysql_creation_options(config))
ActiveRecord::Base.connection.execute grant_statement
ActiveRecord::Base.establish_connection(config)
else
$stderr.puts sqlerr.error
$stderr.puts "Couldn't create database for #{config.inspect}, charset: #{config['charset'] || @charset}, collation: #{config['collation'] || @collation}"
$stderr.puts "(if you set the charset manually, make sure you have a matching collation)" if config['charset']
end
end
when /postgresql/
@encoding = config['encoding'] || ENV['CHARSET'] || 'utf8'
begin
ActiveRecord::Base.establish_connection(config.merge('database' => 'postgres', 'schema_search_path' => 'public'))
ActiveRecord::Base.connection.create_database(config['database'], config.merge('encoding' => @encoding))
ActiveRecord::Base.establish_connection(config)
rescue Exception => e
$stderr.puts e, *(e.backtrace)
$stderr.puts "Couldn't create database for #{config.inspect}"
end
when /ibm_db/
begin
ActiveRecord::Base.establish_connection(config.merge('dbops' => true))
crtSuccessful = ActiveRecord::Base.connection.create_database(config['database'],config['codeSet'], config['mode'])
$stderr.puts "#{config['database']} creation successful" if crtSuccessful
ActiveRecord::Base.establish_connection(config)
rescue StandardError => error
$stderr.puts "#{config['database']} creation process failed: #{error}"
end
end
else
# Bug with 1.9.2 Calling return within begin still executes else
$stderr.puts "#{config['database']} already exists" unless config['adapter'] =~ /sqlite/
end
end
 
namespace :drop do
# desc 'Drops all the local databases defined in config/database.yml'
task :all => :load_config do
ActiveRecord::Base.configurations.each_value do |config|
# Skip entries that don't have a database key
next unless config['database']
begin
# Only connect to local databases
local_database?(config) { drop_database(config) }
rescue Exception => e
$stderr.puts "Couldn't drop #{config['database']} : #{e.inspect}"
end
end
end
end
 
desc 'Drops the database for the current Rails.env (use db:drop:all to drop all databases)'
task :drop => :load_config do
config = ActiveRecord::Base.configurations[Rails.env || 'development']
begin
drop_database(config)
rescue Exception => e
$stderr.puts "Couldn't drop #{config['database']} : #{e.inspect}"
end
end
 
def local_database?(config, &block)
if config['host'].in?(['127.0.0.1', 'localhost']) || config['host'].blank? || config['adapter'].to_s =~ /ibm_db/
yield
else
$stderr.puts "This task only modifies local databases. #{config['database']} is on a remote host."
end
end
 
 
desc "Migrate the database (options: VERSION=x, VERBOSE=false)."
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)
db_namespace["schema:dump"].invoke if ActiveRecord::Base.schema_format == :ruby
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['schema:dump'].invoke if ActiveRecord::Base.schema_format == :ruby
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' unless version
ActiveRecord::Migrator.run(:down, ActiveRecord::Migrator.migrations_paths, version)
db_namespace['schema:dump'].invoke if ActiveRecord::Base.schema_format == :ruby
end
 
desc 'Display status of migrations'
task :status => [:environment, :load_config] do
config = ActiveRecord::Base.configurations[Rails.env || 'development']
ActiveRecord::Base.establish_connection(config)
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}")
file_list = []
ActiveRecord::Migrator.migrations_paths.each do |path|
Dir.foreach(path) do |file|
# only files matching "20091231235959_some_name.rb" pattern
if match_data = /^(\d{14})_(.+)\.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: #{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['schema:dump'].invoke if ActiveRecord::Base.schema_format == :ruby
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['schema:dump'].invoke if ActiveRecord::Base.schema_format == :ruby
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 do
config = ActiveRecord::Base.configurations[Rails.env || 'development']
case config['adapter']
when /mysql/
ActiveRecord::Base.establish_connection(config)
puts ActiveRecord::Base.connection.charset
when /postgresql/
ActiveRecord::Base.establish_connection(config)
puts ActiveRecord::Base.connection.encoding
when /sqlite/
ActiveRecord::Base.establish_connection(config)
puts ActiveRecord::Base.connection.encoding
else
$stderr.puts 'sorry, your database adapter is not supported yet, feel free to submit a patch'
end
end
 
# desc "Retrieves the collation for the current environment's database"
task :collation => :environment do
config = ActiveRecord::Base.configurations[Rails.env || 'development']
case config['adapter']
when /mysql/
ActiveRecord::Base.establish_connection(config)
puts ActiveRecord::Base.connection.collation
else
$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 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
if defined? ActiveRecord
pending_migrations = ActiveRecord::Migrator.new(:up, ActiveRecord::Migrator.migrations_paths).pending_migrations
 
if pending_migrations.any?
puts "You have #{pending_migrations.size} pending migrations:"
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
end
 
desc 'Create the database, load the schema, and initialize with the seed data (use db:reset to also drop the db first)'
task :setup => [ 'db:create', 'db:schema:load', 'db:seed' ]
 
desc 'Load the seed data from db/seeds.rb'
task :seed => 'db:abort_if_pending_migrations' do
Rails.application.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 do
require 'active_record/fixtures'
 
ActiveRecord::Base.establish_connection(Rails.env)
base_dir = File.join [Rails.root, ENV['FIXTURES_PATH'] || %w{test fixtures}].flatten
fixtures_dir = File.join [base_dir, ENV['FIXTURES_DIR']].compact
 
(ENV['FIXTURES'] ? ENV['FIXTURES'].split(/,/) : Dir["#{fixtures_dir}/**/*.{yml,csv}"].map {|f| f[(fixtures_dir.size + 1)..-5] }).each do |fixture_file|
ActiveRecord::Fixtures.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 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::Fixtures.identify(label)}.) if label
 
base_dir = ENV['FIXTURES_PATH'] ? File.join(Rails.root, ENV['FIXTURES_PATH']) : File.join(Rails.root, 'test', 'fixtures')
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::Fixtures.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 can be portably used against any DB supported by AR'
task :dump => [:environment, :load_config] do
require 'active_record/schema_dumper'
filename = ENV['SCHEMA'] || "#{Rails.root}/db/schema.rb"
File.open(filename, "w:utf-8") do |file|
ActiveRecord::Base.establish_connection(Rails.env)
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 do
file = ENV['SCHEMA'] || "#{Rails.root}/db/schema.rb"
if File.exists?(file)
load(file)
else
abort %{#{file} doesn't exist yet. Run "rake db:migrate" to create it then try again. If you do not intend to use a database, you should instead alter #{Rails.root}/config/application.rb to limit the frameworks that will be loaded}
end
end
end
 
namespace :structure do
desc 'Dump the database structure to an SQL file'
task :dump => :environment do
abcs = ActiveRecord::Base.configurations
case abcs[Rails.env]['adapter']
when /mysql/, 'oci', 'oracle'
ActiveRecord::Base.establish_connection(abcs[Rails.env])
File.open("#{Rails.root}/db/#{Rails.env}_structure.sql", "w+") { |f| f << ActiveRecord::Base.connection.structure_dump }
when /postgresql/
ENV['PGHOST'] = abcs[Rails.env]['host'] if abcs[Rails.env]['host']
ENV['PGPORT'] = abcs[Rails.env]["port"].to_s if abcs[Rails.env]['port']
ENV['PGPASSWORD'] = abcs[Rails.env]['password'].to_s if abcs[Rails.env]['password']
search_path = abcs[Rails.env]['schema_search_path']
unless search_path.blank?
search_path = search_path.split(",").map{|search_path| "--schema=#{search_path.strip}" }.join(" ")
end
`pg_dump -i -U "#{abcs[Rails.env]['username']}" -s -x -O -f db/#{Rails.env}_structure.sql #{search_path} #{abcs[Rails.env]['database']}`
raise 'Error dumping database' if $?.exitstatus == 1
when /sqlite/
dbfile = abcs[Rails.env]['database'] || abcs[Rails.env]['dbfile']
`sqlite3 #{dbfile} .schema > db/#{Rails.env}_structure.sql`
when 'sqlserver'
`smoscript -s #{abcs[Rails.env]['host']} -d #{abcs[Rails.env]['database']} -u #{abcs[Rails.env]['username']} -p #{abcs[Rails.env]['password']} -f db\\#{Rails.env}_structure.sql -A -U`
when "firebird"
set_firebird_env(abcs[Rails.env])
db_string = firebird_db_string(abcs[Rails.env])
sh "isql -a #{db_string} > #{Rails.root}/db/#{Rails.env}_structure.sql"
else
raise "Task not supported by '#{abcs[Rails.env]["adapter"]}'"
end
 
if ActiveRecord::Base.connection.supports_migrations?
File.open("#{Rails.root}/db/#{Rails.env}_structure.sql", "a") { |f| f << ActiveRecord::Base.connection.dump_schema_information }
end
end
end
 
namespace :test do
# desc "Recreate the test database from the current schema.rb"
task :load => 'db:test:purge' do
ActiveRecord::Base.establish_connection(ActiveRecord::Base.configurations['test'])
ActiveRecord::Schema.verbose = false
db_namespace['schema:load'].invoke
end
 
# desc "Recreate the test database from the current environment's database schema"
task :clone => %w(db:schema:dump db:test:load)
 
# desc "Recreate the test databases from the development structure"
task :clone_structure => [ 'db:structure:dump', 'db:test:purge' ] do
abcs = ActiveRecord::Base.configurations
case abcs['test']['adapter']
when /mysql/
ActiveRecord::Base.establish_connection(:test)
ActiveRecord::Base.connection.execute('SET foreign_key_checks = 0')
IO.readlines("#{Rails.root}/db/#{Rails.env}_structure.sql").join.split("\n\n").each do |table|
ActiveRecord::Base.connection.execute(table)
end
when /postgresql/
ENV['PGHOST'] = abcs['test']['host'] if abcs['test']['host']
ENV['PGPORT'] = abcs['test']['port'].to_s if abcs['test']['port']
ENV['PGPASSWORD'] = abcs['test']['password'].to_s if abcs['test']['password']
`psql -U "#{abcs['test']['username']}" -f "#{Rails.root}/db/#{Rails.env}_structure.sql" #{abcs['test']['database']} #{abcs['test']['template']}`
when /sqlite/
dbfile = abcs['test']['database'] || abcs['test']['dbfile']
`sqlite3 #{dbfile} < "#{Rails.root}/db/#{Rails.env}_structure.sql"`
when 'sqlserver'
`sqlcmd -S #{abcs['test']['host']} -d #{abcs['test']['database']} -U #{abcs['test']['username']} -P #{abcs['test']['password']} -i db\\#{Rails.env}_structure.sql`
when 'oci', 'oracle','ibm_db'
ActiveRecord::Base.establish_connection(:test)
IO.readlines("#{Rails.root}/db/#{Rails.env}_structure.sql").join.split(";\n\n").each do |ddl|
ActiveRecord::Base.connection.execute(ddl)
end
when 'firebird'
set_firebird_env(abcs['test'])
db_string = firebird_db_string(abcs['test'])
sh "isql -i #{Rails.root}/db/#{Rails.env}_structure.sql #{db_string}"
else
raise "Task not supported by '#{abcs['test']['adapter']}'"
end
end
 
# desc "Empty the test database"
task :purge => :environment do
abcs = ActiveRecord::Base.configurations
case abcs['test']['adapter']
when /mysql/
ActiveRecord::Base.establish_connection(:test)
ActiveRecord::Base.connection.recreate_database(abcs['test']['database'], mysql_creation_options(abcs['test']))
when /postgresql/
ActiveRecord::Base.clear_active_connections!
drop_database(abcs['test'])
create_database(abcs['test'])
when /sqlite/
dbfile = abcs['test']['database'] || abcs['test']['dbfile']
File.delete(dbfile) if File.exist?(dbfile)
when 'sqlserver'
test = abcs.deep_dup['test']
test_database = test['database']
test['database'] = 'master'
ActiveRecord::Base.establish_connection(test)
ActiveRecord::Base.connection.recreate_database!(test_database)
when "oci", "oracle"
ActiveRecord::Base.establish_connection(:test)
ActiveRecord::Base.connection.structure_drop.split(";\n\n").each do |ddl|
ActiveRecord::Base.connection.execute(ddl)
end
when 'firebird'
ActiveRecord::Base.establish_connection(:test)
ActiveRecord::Base.connection.recreate_database!
when 'ibm_db'
drop_database(abcs['test'])
create_database(abcs['test'])
else
raise "Task not supported by '#{abcs['test']['adapter']}'"
end
end
 
# desc 'Check for pending migrations and load the test schema'
task :prepare => 'db:abort_if_pending_migrations' do
if defined?(ActiveRecord) && !ActiveRecord::Base.configurations.blank?
db_namespace[{ :sql => 'test:clone_structure', :ruby => 'test:load' }[ActiveRecord::Base.schema_format]].invoke
end
end
end
 
namespace :sessions do
# desc "Creates a sessions migration for use with ActiveRecord::SessionStore"
task :create => :environment do
raise 'Task unavailable to this database (no migration support)' unless ActiveRecord::Base.connection.supports_migrations?
require 'rails/generators'
Rails::Generators.configure!
require 'rails/generators/rails/session_migration/session_migration_generator'
Rails::Generators::SessionMigrationGenerator.start [ ENV['MIGRATION'] || 'add_sessions_table' ]
end
 
# desc "Clear the sessions table"
task :clear => :environment do
ActiveRecord::Base.connection.execute "DELETE FROM #{session_table_name}"
end
end
end
 
namespace :railties do
namespace :install do
# desc "Copies missing migrations from Railties (e.g. plugins, 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 = ActiveSupport::OrderedHash.new
Rails.application.railties.all 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, old_path|
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
 
task 'test:prepare' => 'db:test:prepare'
 
def drop_database(config)
case config['adapter']
when /mysql/
ActiveRecord::Base.establish_connection(config)
ActiveRecord::Base.connection.drop_database config['database']
when /sqlite/
require 'pathname'
path = Pathname.new(config['database'])
file = path.absolute? ? path.to_s : File.join(Rails.root, path)
 
FileUtils.rm(file)
when /postgresql/
ActiveRecord::Base.establish_connection(config.merge('database' => 'postgres', 'schema_search_path' => 'public'))
ActiveRecord::Base.connection.drop_database config['database']
when /ibm_db/
ActiveRecord::Base.establish_connection(config.merge('dbops' => true))
drpSuccessful = ActiveRecord::Base.connection.drop_database config['database']
$stderr.puts "#{config['database']} drop successful" if drpSuccessful
ActiveRecord::Base.connection.disconnect!
drpSuccessful
end
end
 
def session_table_name
ActiveRecord::SessionStore::Session.table_name
end
 
def set_firebird_env(config)
ENV['ISC_USER'] = config['username'].to_s if config['username']
ENV['ISC_PASSWORD'] = config['password'].to_s if config['password']
end
 
def firebird_db_string(config)
FireRuby::Database.db_string_for(config.symbolize_keys)
end

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