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module ActiveRecord
module Tasks # :nodoc:
class MySQLDatabaseTasks # :nodoc:
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.message
establish_connection root_configuration_without_database
connection.create_database configuration['database'], creation_options
if configuration['username'] != 'root'
connection.execute grant_statement.gsub(/\s+/, ' ').strip
end
establish_connection configuration
else
$stderr.puts error.inspect
$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 configuration
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
args.concat(["--result-file", "#{filename}"])
args.concat(["--no-data"])
args.concat(["--routines"])
args.concat(["--skip-comments"])
args.concat(["#{configuration['database']}"])
run_cmd('mysqldump', args, 'dumping')
end
def structure_load(filename)
args = prepare_command_options
args.concat(['--execute', %{SET FOREIGN_KEY_CHECKS = 0; SOURCE #{filename}; SET FOREIGN_KEY_CHECKS = 1}])
args.concat(["--database", "#{configuration['database']}"])
run_cmd('mysql', args, 'loading')
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'
end
end
def error_class
if configuration['adapter'] =~ /jdbc/
require 'active_record/railties/jdbcmysql_error'
ArJdbcMySQL::Error
elsif defined?(Mysql2)
Mysql2::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
args = {
'host' => '--host',
'port' => '--port',
'socket' => '--socket',
'username' => '--user',
'password' => '--password',
'encoding' => '--default-character-set',
'sslca' => '--ssl-ca',
'sslcert' => '--ssl-cert',
'sslcapath' => '--ssl-capath',
'sslcipher' => '--ssl-cipher',
'sslkey' => '--ssl-key'
}.map { |opt, arg| "#{arg}=#{configuration[opt]}" if configuration[opt] }.compact
args
end
def run_cmd(cmd, args, action)
fail run_cmd_error(cmd, args, action) unless Kernel.system(cmd, *args)
end
def run_cmd_error(cmd, args, action)
msg = "failed to execute: `#{cmd}`\n"
msg << "Please check the output above for any errors and make sure that `#{cmd}` is installed in your PATH and has proper permissions.\n\n"
msg
end
end
end
end
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