329 lines
7.8 KiB
PHP
Executable File
329 lines
7.8 KiB
PHP
Executable File
<?php defined('BASEPATH') OR exit('No direct script access allowed');
|
|
/**
|
|
* CodeIgniter
|
|
*
|
|
* An open source application development framework for PHP 5.1.6 or newer
|
|
*
|
|
* @package CodeIgniter
|
|
* @author EllisLab Dev Team
|
|
* @copyright Copyright (c) 2006 - 2014, EllisLab, Inc.
|
|
* @license http://codeigniter.com/user_guide/license.html
|
|
* @link http://codeigniter.com
|
|
* @since Version 1.0
|
|
* @filesource
|
|
*/
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Migration Class
|
|
*
|
|
* All migrations should implement this, forces up() and down() and gives
|
|
* access to the CI super-global.
|
|
*
|
|
* @package CodeIgniter
|
|
* @subpackage Libraries
|
|
* @category Libraries
|
|
* @author Reactor Engineers
|
|
* @link
|
|
*/
|
|
class CI_Migration {
|
|
|
|
protected $_migration_enabled = FALSE;
|
|
protected $_migration_path = NULL;
|
|
protected $_migration_version = 0;
|
|
|
|
protected $_error_string = '';
|
|
|
|
public function __construct($config = array())
|
|
{
|
|
# Only run this constructor on main library load
|
|
if (get_parent_class($this) !== FALSE)
|
|
{
|
|
return;
|
|
}
|
|
|
|
foreach ($config as $key => $val)
|
|
{
|
|
$this->{'_' . $key} = $val;
|
|
}
|
|
|
|
log_message('debug', 'Migrations class initialized');
|
|
|
|
// Are they trying to use migrations while it is disabled?
|
|
if ($this->_migration_enabled !== TRUE)
|
|
{
|
|
show_error('Migrations has been loaded but is disabled or set up incorrectly.');
|
|
}
|
|
|
|
// If not set, set it
|
|
$this->_migration_path == '' AND $this->_migration_path = APPPATH . 'migrations/';
|
|
|
|
// Add trailing slash if not set
|
|
$this->_migration_path = rtrim($this->_migration_path, '/').'/';
|
|
|
|
// Load migration language
|
|
$this->lang->load('migration');
|
|
|
|
// They'll probably be using dbforge
|
|
$this->load->dbforge();
|
|
|
|
// If the migrations table is missing, make it
|
|
if ( ! $this->db->table_exists('migrations'))
|
|
{
|
|
$this->dbforge->add_field(array(
|
|
'version' => array('type' => 'INT', 'constraint' => 3),
|
|
));
|
|
|
|
$this->dbforge->create_table('migrations', TRUE);
|
|
|
|
$this->db->insert('migrations', array('version' => 0));
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Migrate to a schema version
|
|
*
|
|
* Calls each migration step required to get to the schema version of
|
|
* choice
|
|
*
|
|
* @param int Target schema version
|
|
* @return mixed TRUE if already latest, FALSE if failed, int if upgraded
|
|
*/
|
|
public function version($target_version)
|
|
{
|
|
$start = $current_version = $this->_get_version();
|
|
$stop = $target_version;
|
|
|
|
if ($target_version > $current_version)
|
|
{
|
|
// Moving Up
|
|
++$start;
|
|
++$stop;
|
|
$step = 1;
|
|
}
|
|
else
|
|
{
|
|
// Moving Down
|
|
$step = -1;
|
|
}
|
|
|
|
$method = ($step === 1) ? 'up' : 'down';
|
|
$migrations = array();
|
|
|
|
// We now prepare to actually DO the migrations
|
|
// But first let's make sure that everything is the way it should be
|
|
for ($i = $start; $i != $stop; $i += $step)
|
|
{
|
|
$f = glob(sprintf($this->_migration_path . '%03d_*.php', $i));
|
|
|
|
// Only one migration per step is permitted
|
|
if (count($f) > 1)
|
|
{
|
|
$this->_error_string = sprintf($this->lang->line('migration_multiple_version'), $i);
|
|
return FALSE;
|
|
}
|
|
|
|
// Migration step not found
|
|
if (count($f) == 0)
|
|
{
|
|
// If trying to migrate up to a version greater than the last
|
|
// existing one, migrate to the last one.
|
|
if ($step == 1)
|
|
{
|
|
break;
|
|
}
|
|
|
|
// If trying to migrate down but we're missing a step,
|
|
// something must definitely be wrong.
|
|
$this->_error_string = sprintf($this->lang->line('migration_not_found'), $i);
|
|
return FALSE;
|
|
}
|
|
|
|
$file = basename($f[0]);
|
|
$name = basename($f[0], '.php');
|
|
|
|
// Filename validations
|
|
if (preg_match('/^\d{3}_(\w+)$/', $name, $match))
|
|
{
|
|
$match[1] = strtolower($match[1]);
|
|
|
|
// Cannot repeat a migration at different steps
|
|
if (in_array($match[1], $migrations))
|
|
{
|
|
$this->_error_string = sprintf($this->lang->line('migration_multiple_version'), $match[1]);
|
|
return FALSE;
|
|
}
|
|
|
|
include $f[0];
|
|
$class = 'Migration_' . ucfirst($match[1]);
|
|
|
|
if ( ! class_exists($class))
|
|
{
|
|
$this->_error_string = sprintf($this->lang->line('migration_class_doesnt_exist'), $class);
|
|
return FALSE;
|
|
}
|
|
|
|
if ( ! is_callable(array($class, $method)))
|
|
{
|
|
$this->_error_string = sprintf($this->lang->line('migration_missing_'.$method.'_method'), $class);
|
|
return FALSE;
|
|
}
|
|
|
|
$migrations[] = $match[1];
|
|
}
|
|
else
|
|
{
|
|
$this->_error_string = sprintf($this->lang->line('migration_invalid_filename'), $file);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
log_message('debug', 'Current migration: ' . $current_version);
|
|
|
|
$version = $i + ($step == 1 ? -1 : 0);
|
|
|
|
// If there is nothing to do so quit
|
|
if ($migrations === array())
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
log_message('debug', 'Migrating from ' . $method . ' to version ' . $version);
|
|
|
|
// Loop through the migrations
|
|
foreach ($migrations AS $migration)
|
|
{
|
|
// Run the migration class
|
|
$class = 'Migration_' . ucfirst(strtolower($migration));
|
|
call_user_func(array(new $class, $method));
|
|
|
|
$current_version += $step;
|
|
$this->_update_version($current_version);
|
|
}
|
|
|
|
log_message('debug', 'Finished migrating to '.$current_version);
|
|
|
|
return $current_version;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Set's the schema to the latest migration
|
|
*
|
|
* @return mixed true if already latest, false if failed, int if upgraded
|
|
*/
|
|
public function latest()
|
|
{
|
|
if ( ! $migrations = $this->find_migrations())
|
|
{
|
|
$this->_error_string = $this->lang->line('migration_none_found');
|
|
return false;
|
|
}
|
|
|
|
$last_migration = basename(end($migrations));
|
|
|
|
// Calculate the last migration step from existing migration
|
|
// filenames and procceed to the standard version migration
|
|
return $this->version((int) substr($last_migration, 0, 3));
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Set's the schema to the migration version set in config
|
|
*
|
|
* @return mixed true if already current, false if failed, int if upgraded
|
|
*/
|
|
public function current()
|
|
{
|
|
return $this->version($this->_migration_version);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Error string
|
|
*
|
|
* @return string Error message returned as a string
|
|
*/
|
|
public function error_string()
|
|
{
|
|
return $this->_error_string;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Set's the schema to the latest migration
|
|
*
|
|
* @return mixed true if already latest, false if failed, int if upgraded
|
|
*/
|
|
protected function find_migrations()
|
|
{
|
|
// Load all *_*.php files in the migrations path
|
|
$files = glob($this->_migration_path . '*_*.php');
|
|
$file_count = count($files);
|
|
|
|
for ($i = 0; $i < $file_count; $i++)
|
|
{
|
|
// Mark wrongly formatted files as false for later filtering
|
|
$name = basename($files[$i], '.php');
|
|
if ( ! preg_match('/^\d{3}_(\w+)$/', $name))
|
|
{
|
|
$files[$i] = FALSE;
|
|
}
|
|
}
|
|
|
|
sort($files);
|
|
return $files;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Retrieves current schema version
|
|
*
|
|
* @return int Current Migration
|
|
*/
|
|
protected function _get_version()
|
|
{
|
|
$row = $this->db->get('migrations')->row();
|
|
return $row ? $row->version : 0;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Stores the current schema version
|
|
*
|
|
* @param int Migration reached
|
|
* @return bool
|
|
*/
|
|
protected function _update_version($migrations)
|
|
{
|
|
return $this->db->update('migrations', array(
|
|
'version' => $migrations
|
|
));
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Enable the use of CI super-global
|
|
*
|
|
* @param mixed $var
|
|
* @return mixed
|
|
*/
|
|
public function __get($var)
|
|
{
|
|
return get_instance()->$var;
|
|
}
|
|
|
|
}
|
|
|
|
/* End of file Migration.php */
|
|
/* Location: ./system/libraries/Migration.php */ |