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module ActiveRecord
module Tasks # :nodoc:
class MySQLDatabaseTasks # :nodoc:
DEFAULT_CHARSET = ENV['CHARSET'] || 'utf8'
DEFAULT_COLLATION = ENV['COLLATION'] || 'utf8_unicode_ci'
ACCESS_DENIED_ERROR = 1045
delegate :connection, :establish_connection, to: ActiveRecord::Base
def initialize(configuration)
@configuration = configuration
end
def create
establish_connection configuration_without_database
connection.create_database configuration['database'], creation_options
establish_connection configuration
rescue ActiveRecord::StatementInvalid => error
if /database exists/ === error.message
raise DatabaseAlreadyExists
else
raise
end
rescue error_class => error
if error.respond_to?(:errno) && error.errno == ACCESS_DENIED_ERROR
$stdout.print error.error
establish_connection root_configuration_without_database
connection.create_database configuration['database'], creation_options
connection.execute grant_statement.gsub(/\s+/, ' ').strip
establish_connection configuration
else
$stderr.puts "Couldn't create database for #{configuration.inspect}, #{creation_options.inspect}"
$stderr.puts "(If you set the charset manually, make sure you have a matching collation)" if configuration['encoding']
end
end
def drop
establish_connection configuration
connection.drop_database configuration['database']
end
def purge
establish_connection :test
connection.recreate_database configuration['database'], creation_options
end
def charset
connection.charset
end
def collation
connection.collation
end
def structure_dump(filename)
args = prepare_command_options('mysqldump')
args.concat(["--result-file", "#{filename}"])
args.concat(["--no-data"])
args.concat(["#{configuration['database']}"])
unless Kernel.system(*args)
$stderr.puts "Could not dump the database structure. "\
"Make sure `mysqldump` is in your PATH and check the command output for warnings."
end
end
def structure_load(filename)
args = prepare_command_options('mysql')
args.concat(['--execute', %{SET FOREIGN_KEY_CHECKS = 0; SOURCE #{filename}; SET FOREIGN_KEY_CHECKS = 1}])
args.concat(["--database", "#{configuration['database']}"])
Kernel.system(*args)
end
private
def configuration
@configuration
end
def configuration_without_database
configuration.merge('database' => nil)
end
def creation_options
Hash.new.tap do |options|
options[:charset] = configuration['encoding'] if configuration.include? 'encoding'
options[:collation] = configuration['collation'] if configuration.include? 'collation'
# Set default charset only when collation isn't set.
options[:charset] ||= DEFAULT_CHARSET unless options[:collation]
# Set default collation only when charset is also default.
options[:collation] ||= DEFAULT_COLLATION if options[:charset] == DEFAULT_CHARSET
end
end
def error_class
if configuration['adapter'] =~ /jdbc/
require 'active_record/railties/jdbcmysql_error'
ArJdbcMySQL::Error
elsif defined?(Mysql2)
Mysql2::Error
elsif defined?(Mysql)
Mysql::Error
else
StandardError
end
end
def grant_statement
<<-SQL
GRANT ALL PRIVILEGES ON #{configuration['database']}.*
TO '#{configuration['username']}'@'localhost'
IDENTIFIED BY '#{configuration['password']}' WITH GRANT OPTION;
SQL
end
def root_configuration_without_database
configuration_without_database.merge(
'username' => 'root',
'password' => root_password
)
end
def root_password
$stdout.print "Please provide the root password for your mysql installation\n>"
$stdin.gets.strip
end
def prepare_command_options(command)
args = [command]
args.concat(['--user', configuration['username']]) if configuration['username']
args << "--password=#{configuration['password']}" if configuration['password']
args.concat(['--default-character-set', configuration['encoding']]) if configuration['encoding']
configuration.slice('host', 'port', 'socket').each do |k, v|
args.concat([ "--#{k}", v ]) if v
end
args
end
end
end
end
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