Phil Sturgeon avatar Phil Sturgeon committed 6b5ce45 Merge

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Files changed (2)

application/config/migration.php

-<?php defined('BASEPATH') OR exit('No direct script access allowed');
-/*
-|--------------------------------------------------------------------------
-| Enable/Disable Migrations
-|--------------------------------------------------------------------------
-|
-| Migrations are disabled by default for security reasons.
-| You should enable migrations whenever you intend to do a schema migration
-| and disable it back when you're done.
-|
-*/
-$config['migration_enabled'] = TRUE;
-
-
-/*
-|--------------------------------------------------------------------------
-| Migrations version
-|--------------------------------------------------------------------------
-|
-| This is used to set migration version that the file system should be on.
-| If you run $this->migration->latest() this is the version that schema will
-| be upgraded / downgraded to.
-|
-*/
-$config['migration_version'] = 1;
-
-
-/*
-|--------------------------------------------------------------------------
-| Migrations Path
-|--------------------------------------------------------------------------
-|
-| Path to your migrations folder.
-| Typically, it will be within your application path.
-| Also, writing permission is required within the migrations path.
-|
-*/
-$config['migration_path'] = APPPATH . 'migrations/';

system/libraries/Migration.php

-<?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 - 2011, 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 {
-
-	private $_migration_enabled = FALSE;
-	private $_migration_path = NULL;
-	private $_migration_version = 0;
-
-	public $error = '';
-
-	function __construct($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 == '' OR $this->_migration_path = APPPATH . 'migrations/';
-
-		// Add trailing slash if not set
-		$this->_migration_path = rtrim($this->_migration_path, '/').'/';
-
-		// 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
-	 *
-	 * @access	public
-	 * @param $version integer	Target schema version
-	 * @return	mixed	TRUE if already latest, FALSE if failed, int if upgraded
-	 */
-	function version($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)
-			{
-				$this->error = sprintf($this->lang->line('multiple_migration_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.
-				$this->error = sprintf($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))
-				{
-					$this->error = sprintf($this->lang->line('multiple_migrations_name'), $match[1]);
-					return FALSE;
-				}
-
-				include $f[0];
-				$class = 'Migration_' . ucfirst($match[1]);
-
-				if ( ! class_exists($class))
-				{
-					$this->error = sprintf($this->lang->line('migration_class_doesnt_exist'), $class);
-					return FALSE;
-				}
-
-				if ( ! is_callable(array($class, 'up')) || ! is_callable(array($class, 'down')))
-				{
-					$this->error = sprintf($this->lang->line('wrong_migration_interface'), $class);
-					return FALSE;
-				}
-
-				$migrations[] = $match[1];
-			}
-			else
-			{
-				$this->error = sprintf($this->lang->line('invalid_migration_filename'), $file);
-				return FALSE;
-			}
-		}
-
-		$this->log('Current schema version: ' . $current_version);
-
-		$version = $i + ($step == 1 ? -1 : 0);
-
-		// If there is nothing to do so quit
-		if ($migrations === array())
-		{
-			return TRUE;
-		}
-
-		$this->log('Moving ' . $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);
-		}
-
-		$this->log('All done. Schema is at version '.$current_version);
-
-		return $current_version;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Set's the schema to the latest migration
-	 *
-	 * @access	public
-	 * @return	mixed	true if already latest, false if failed, int if upgraded
-	 */
-	public function latest()
-	{
-		if ( ! $migrations = $this->find_migrations())
-		{
-			throw new Exception('no_migrations_found');
-			return false;
-		}
-
-		$last_migration = basename(end($migrations));
-
-		// Calculate the last migration step from existing migration
-		// filenames and procceed to the standard version migration
-		$last_version = intval(substr($last_migration, 0, 3));
-		return $this->version($last_version);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Set's the schema to the migration version set in config
-	 *
-	 * @access	public
-	 * @return	mixed	true if already current, false if failed, int if upgraded
-	 */
-	public function current()
-	{
-		$version = $this->_migration_version;
-		return $this->version($version);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Set's the schema to the latest migration
-	 *
-	 * @access	public
-	 * @return	mixed	true if already latest, false if failed, int if upgraded
-	 */
-
-	protected static 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
-	 *
-	 * @access	private
-	 * @return	integer	Current Schema version
-	 */
-	private function _get_version()
-	{
-		$row = $this->db->get('migrations')->row();
-		return $row ? $row->version : 0;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Stores the current schema version
-	 *
-	 * @access	private
-	 * @param $migrations integer	Schema version reached
-	 * @return	void					Outputs a report of the migration
-	 */
-	private function _update_version($migrations)
-	{
-		return $this->db->update('migrations', array(
-			'version' => $migrations
-		));
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Stores the current schema version
-	 *
-	 * @access	private
-	 * @param $migrations integer	Schema version reached
-	 * @return	void					Outputs a report of the migration
-	 */
-	private function log($text)
-	{
-		echo $text.'<br/>';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Enable the use of CI super-global
-	 *
-	 * @access	public
-	 * @param $var
-	 * @return	mixed
-	 */
-	public function __get($var)
-	{
-		return get_instance()->$var;
-	}
-}
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