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694 lines
18 KiB
694 lines
18 KiB
<?php
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/**
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* Schema database management for CakePHP.
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs.model
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* @since CakePHP(tm) v 1.2.0.5550
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* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
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*/
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App::import('Core', array('Model', 'ConnectionManager'));
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/**
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* Base Class for Schema management
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*
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* @package cake
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* @subpackage cake.cake.libs.model
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*/
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class CakeSchema extends Object {
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/**
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* Name of the App Schema
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*
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* @var string
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* @access public
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*/
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var $name = null;
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/**
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* Path to write location
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*
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* @var string
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* @access public
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*/
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var $path = null;
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/**
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* File to write
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*
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* @var string
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* @access public
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*/
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var $file = 'schema.php';
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/**
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* Connection used for read
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*
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* @var string
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* @access public
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*/
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var $connection = 'default';
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/**
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* plugin name.
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*
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* @var string
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*/
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var $plugin = null;
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/**
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* Set of tables
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*
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* @var array
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* @access public
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*/
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var $tables = array();
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/**
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* Constructor
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*
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* @param array $options optional load object properties
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*/
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function __construct($options = array()) {
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parent::__construct();
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if (empty($options['name'])) {
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$this->name = preg_replace('/schema$/i', '', get_class($this));
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}
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if (!empty($options['plugin'])) {
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$this->plugin = $options['plugin'];
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}
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if (strtolower($this->name) === 'cake') {
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$this->name = Inflector::camelize(Inflector::slug(Configure::read('App.dir')));
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}
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if (empty($options['path'])) {
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if (is_dir(CONFIGS . 'schema')) {
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$this->path = CONFIGS . 'schema';
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} else {
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$this->path = CONFIGS . 'sql';
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}
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}
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$options = array_merge(get_object_vars($this), $options);
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$this->_build($options);
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}
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/**
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* Builds schema object properties
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*
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* @param array $data loaded object properties
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* @return void
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* @access protected
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*/
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function _build($data) {
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$file = null;
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foreach ($data as $key => $val) {
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if (!empty($val)) {
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if (!in_array($key, array('plugin', 'name', 'path', 'file', 'connection', 'tables', '_log'))) {
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$this->tables[$key] = $val;
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unset($this->{$key});
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} elseif ($key !== 'tables') {
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if ($key === 'name' && $val !== $this->name && !isset($data['file'])) {
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$file = Inflector::underscore($val) . '.php';
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}
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$this->{$key} = $val;
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}
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}
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}
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if (file_exists($this->path . DS . $file) && is_file($this->path . DS . $file)) {
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$this->file = $file;
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} elseif (!empty($this->plugin)) {
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$this->path = App::pluginPath($this->plugin) . 'config' . DS . 'schema';
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}
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}
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/**
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* Before callback to be implemented in subclasses
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*
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* @param array $events schema object properties
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* @return boolean Should process continue
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* @access public
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*/
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function before($event = array()) {
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return true;
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}
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/**
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* After callback to be implemented in subclasses
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*
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* @param array $events schema object properties
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* @access public
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*/
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function after($event = array()) {
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}
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/**
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* Reads database and creates schema tables
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*
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* @param array $options schema object properties
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* @return array Set of name and tables
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* @access public
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*/
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function &load($options = array()) {
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if (is_string($options)) {
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$options = array('path' => $options);
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}
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$this->_build($options);
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extract(get_object_vars($this));
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$class = $name .'Schema';
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if (!class_exists($class)) {
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if (file_exists($path . DS . $file) && is_file($path . DS . $file)) {
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require_once($path . DS . $file);
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} elseif (file_exists($path . DS . 'schema.php') && is_file($path . DS . 'schema.php')) {
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require_once($path . DS . 'schema.php');
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}
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}
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if (class_exists($class)) {
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$Schema =& new $class($options);
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return $Schema;
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}
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$false = false;
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return $false;
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}
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/**
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* Reads database and creates schema tables
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*
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* Options
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*
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* - 'connection' - the db connection to use
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* - 'name' - name of the schema
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* - 'models' - a list of models to use, or false to ignore models
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*
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* @param array $options schema object properties
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* @return array Array indexed by name and tables
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* @access public
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*/
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function read($options = array()) {
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extract(array_merge(
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array(
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'connection' => $this->connection,
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'name' => $this->name,
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'models' => true,
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),
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$options
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));
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$db =& ConnectionManager::getDataSource($connection);
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App::import('Model', 'AppModel');
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if (isset($this->plugin)) {
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App::import('Model', Inflector::camelize($this->plugin) . 'AppModel');
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}
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$tables = array();
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$currentTables = $db->listSources();
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$prefix = null;
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if (isset($db->config['prefix'])) {
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$prefix = $db->config['prefix'];
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}
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if (!is_array($models) && $models !== false) {
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if (isset($this->plugin)) {
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$models = App::objects('model', App::pluginPath($this->plugin) . 'models' . DS, false);
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} else {
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$models = App::objects('model');
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}
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}
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if (is_array($models)) {
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foreach ($models as $model) {
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$importModel = $model;
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if (isset($this->plugin)) {
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$importModel = $this->plugin . '.' . $model;
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}
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if (!App::import('Model', $importModel)) {
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continue;
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}
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$vars = get_class_vars($model);
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if (empty($vars['useDbConfig']) || $vars['useDbConfig'] != $connection) {
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continue;
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}
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if (PHP5) {
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$Object = ClassRegistry::init(array('class' => $model, 'ds' => $connection));
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} else {
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$Object =& ClassRegistry::init(array('class' => $model, 'ds' => $connection));
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}
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if (is_object($Object) && $Object->useTable !== false) {
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$fulltable = $table = $db->fullTableName($Object, false);
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if ($prefix && strpos($table, $prefix) !== 0) {
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continue;
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}
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$table = str_replace($prefix, '', $table);
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if (in_array($fulltable, $currentTables)) {
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$key = array_search($fulltable, $currentTables);
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if (empty($tables[$table])) {
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$tables[$table] = $this->__columns($Object);
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$tables[$table]['indexes'] = $db->index($Object);
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$tables[$table]['tableParameters'] = $db->readTableParameters($fulltable);
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unset($currentTables[$key]);
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}
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if (!empty($Object->hasAndBelongsToMany)) {
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foreach ($Object->hasAndBelongsToMany as $Assoc => $assocData) {
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if (isset($assocData['with'])) {
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$class = $assocData['with'];
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}
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if (is_object($Object->$class)) {
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$withTable = $db->fullTableName($Object->$class, false);
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if (in_array($withTable, $currentTables)) {
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$key = array_search($withTable, $currentTables);
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$tables[$withTable] = $this->__columns($Object->$class);
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$tables[$withTable]['indexes'] = $db->index($Object->$class);
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$tables[$withTable]['tableParameters'] = $db->readTableParameters($withTable);
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unset($currentTables[$key]);
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}
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}
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}
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}
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}
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}
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}
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}
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if (!empty($currentTables)) {
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foreach ($currentTables as $table) {
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if ($prefix) {
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if (strpos($table, $prefix) !== 0) {
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continue;
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}
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$table = str_replace($prefix, '', $table);
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}
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$Object = new AppModel(array(
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'name' => Inflector::classify($table), 'table' => $table, 'ds' => $connection
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));
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$systemTables = array(
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'aros', 'acos', 'aros_acos', Configure::read('Session.table'), 'i18n'
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);
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if (in_array($table, $systemTables)) {
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$tables[$Object->table] = $this->__columns($Object);
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$tables[$Object->table]['indexes'] = $db->index($Object);
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$tables[$Object->table]['tableParameters'] = $db->readTableParameters($table);
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} elseif ($models === false) {
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$tables[$table] = $this->__columns($Object);
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$tables[$table]['indexes'] = $db->index($Object);
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$tables[$table]['tableParameters'] = $db->readTableParameters($table);
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} else {
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$tables['missing'][$table] = $this->__columns($Object);
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$tables['missing'][$table]['indexes'] = $db->index($Object);
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$tables['missing'][$table]['tableParameters'] = $db->readTableParameters($table);
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}
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}
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}
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ksort($tables);
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return compact('name', 'tables');
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}
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/**
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* Writes schema file from object or options
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*
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* @param mixed $object schema object or options array
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* @param array $options schema object properties to override object
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* @return mixed false or string written to file
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* @access public
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*/
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function write($object, $options = array()) {
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if (is_object($object)) {
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$object = get_object_vars($object);
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$this->_build($object);
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}
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if (is_array($object)) {
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$options = $object;
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unset($object);
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}
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extract(array_merge(
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get_object_vars($this), $options
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));
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$out = "class {$name}Schema extends CakeSchema {\n";
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$out .= "\tvar \$name = '{$name}';\n\n";
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if ($path !== $this->path) {
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$out .= "\tvar \$path = '{$path}';\n\n";
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}
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if ($file !== $this->file) {
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$out .= "\tvar \$file = '{$file}';\n\n";
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}
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if ($connection !== 'default') {
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$out .= "\tvar \$connection = '{$connection}';\n\n";
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}
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$out .= "\tfunction before(\$event = array()) {\n\t\treturn true;\n\t}\n\n\tfunction after(\$event = array()) {\n\t}\n\n";
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if (empty($tables)) {
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$this->read();
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}
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foreach ($tables as $table => $fields) {
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if (!is_numeric($table) && $table !== 'missing') {
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$out .= $this->generateTable($table, $fields);
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}
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}
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$out .= "}\n";
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$File =& new File($path . DS . $file, true);
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$header = '$Id';
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$content = "<?php \n/* SVN FILE: {$header}$ */\n/* {$name} schema generated on: " . date('Y-m-d H:m:s') . " : ". time() . "*/\n{$out}?>";
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$content = $File->prepare($content);
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if ($File->write($content)) {
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return $content;
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}
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return false;
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}
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/**
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* Generate the code for a table. Takes a table name and $fields array
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* Returns a completed variable declaration to be used in schema classes
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*
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* @param string $table Table name you want returned.
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* @param array $fields Array of field information to generate the table with.
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* @return string Variable declaration for a schema class
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*/
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function generateTable($table, $fields) {
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$out = "\tvar \${$table} = array(\n";
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if (is_array($fields)) {
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$cols = array();
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foreach ($fields as $field => $value) {
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if ($field != 'indexes' && $field != 'tableParameters') {
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if (is_string($value)) {
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$type = $value;
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$value = array('type'=> $type);
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}
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$col = "\t\t'{$field}' => array('type' => '" . $value['type'] . "', ";
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unset($value['type']);
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$col .= join(', ', $this->__values($value));
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} elseif ($field == 'indexes') {
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$col = "\t\t'indexes' => array(";
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$props = array();
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foreach ((array)$value as $key => $index) {
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$props[] = "'{$key}' => array(" . join(', ', $this->__values($index)) . ")";
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}
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$col .= join(', ', $props);
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} elseif ($field == 'tableParameters') {
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//@todo add charset, collate and engine here
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$col = "\t\t'tableParameters' => array(";
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$props = array();
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foreach ((array)$value as $key => $param) {
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$props[] = "'{$key}' => '$param'";
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}
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$col .= join(', ', $props);
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}
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$col .= ")";
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$cols[] = $col;
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}
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$out .= join(",\n", $cols);
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}
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$out .= "\n\t);\n";
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return $out;
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}
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/**
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* Compares two sets of schemas
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*
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* @param mixed $old Schema object or array
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* @param mixed $new Schema object or array
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* @return array Tables (that are added, dropped, or changed)
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* @access public
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*/
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function compare($old, $new = null) {
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if (empty($new)) {
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$new =& $this;
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}
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if (is_array($new)) {
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if (isset($new['tables'])) {
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$new = $new['tables'];
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}
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} else {
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$new = $new->tables;
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}
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if (is_array($old)) {
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if (isset($old['tables'])) {
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$old = $old['tables'];
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}
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} else {
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$old = $old->tables;
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}
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$tables = array();
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foreach ($new as $table => $fields) {
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if ($table == 'missing') {
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continue;
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}
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if (!array_key_exists($table, $old)) {
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$tables[$table]['add'] = $fields;
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} else {
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$diff = $this->_arrayDiffAssoc($fields, $old[$table]);
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if (!empty($diff)) {
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$tables[$table]['add'] = $diff;
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}
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$diff = $this->_arrayDiffAssoc($old[$table], $fields);
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if (!empty($diff)) {
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$tables[$table]['drop'] = $diff;
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}
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}
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foreach ($fields as $field => $value) {
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if (isset($old[$table][$field])) {
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$diff = $this->_arrayDiffAssoc($value, $old[$table][$field]);
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if (!empty($diff) && $field !== 'indexes' && $field !== 'tableParameters') {
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$tables[$table]['change'][$field] = array_merge($old[$table][$field], $diff);
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}
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}
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if (isset($add[$table][$field])) {
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$wrapper = array_keys($fields);
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if ($column = array_search($field, $wrapper)) {
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if (isset($wrapper[$column - 1])) {
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$tables[$table]['add'][$field]['after'] = $wrapper[$column - 1];
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}
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}
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}
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}
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if (isset($old[$table]['indexes']) && isset($new[$table]['indexes'])) {
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$diff = $this->_compareIndexes($new[$table]['indexes'], $old[$table]['indexes']);
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if ($diff) {
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if (!isset($tables[$table])) {
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$tables[$table] = array();
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}
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if (isset($diff['drop'])) {
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$tables[$table]['drop']['indexes'] = $diff['drop'];
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}
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if ($diff && isset($diff['add'])) {
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$tables[$table]['add']['indexes'] = $diff['add'];
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}
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}
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}
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if (isset($old[$table]['tableParameters']) && isset($new[$table]['tableParameters'])) {
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$diff = $this->_compareTableParameters($new[$table]['tableParameters'], $old[$table]['tableParameters']);
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if ($diff) {
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$tables[$table]['change']['tableParameters'] = $diff;
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}
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}
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}
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return $tables;
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}
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/**
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* Extended array_diff_assoc noticing change from/to NULL values
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*
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* It behaves almost the same way as array_diff_assoc except for NULL values: if
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* one of the values is not NULL - change is detected. It is useful in situation
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* where one value is strval('') ant other is strval(null) - in string comparing
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* methods this results as EQUAL, while it is not.
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*
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* @param array $array1 Base array
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* @param array $array2 Corresponding array checked for equality
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* @return array Difference as array with array(keys => values) from input array
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* where match was not found.
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* @access protected
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*/
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function _arrayDiffAssoc($array1, $array2) {
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$difference = array();
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foreach ($array1 as $key => $value) {
|
|
if (!array_key_exists($key, $array2)) {
|
|
$difference[$key] = $value;
|
|
continue;
|
|
}
|
|
$correspondingValue = $array2[$key];
|
|
if (is_null($value) !== is_null($correspondingValue)) {
|
|
$difference[$key] = $value;
|
|
continue;
|
|
}
|
|
if (is_bool($value) !== is_bool($correspondingValue)) {
|
|
$difference[$key] = $value;
|
|
continue;
|
|
}
|
|
$compare = strval($value);
|
|
$correspondingValue = strval($correspondingValue);
|
|
if ($compare === $correspondingValue) {
|
|
continue;
|
|
}
|
|
$difference[$key] = $value;
|
|
}
|
|
return $difference;
|
|
}
|
|
|
|
/**
|
|
* Formats Schema columns from Model Object
|
|
*
|
|
* @param array $values options keys(type, null, default, key, length, extra)
|
|
* @return array Formatted values
|
|
* @access public
|
|
*/
|
|
function __values($values) {
|
|
$vals = array();
|
|
if (is_array($values)) {
|
|
foreach ($values as $key => $val) {
|
|
if (is_array($val)) {
|
|
$vals[] = "'{$key}' => array('" . implode("', '", $val) . "')";
|
|
} else if (!is_numeric($key)) {
|
|
$val = var_export($val, true);
|
|
$vals[] = "'{$key}' => {$val}";
|
|
}
|
|
}
|
|
}
|
|
return $vals;
|
|
}
|
|
|
|
/**
|
|
* Formats Schema columns from Model Object
|
|
*
|
|
* @param array $Obj model object
|
|
* @return array Formatted columns
|
|
* @access public
|
|
*/
|
|
function __columns(&$Obj) {
|
|
$db =& ConnectionManager::getDataSource($Obj->useDbConfig);
|
|
$fields = $Obj->schema(true);
|
|
$columns = $props = array();
|
|
foreach ($fields as $name => $value) {
|
|
if ($Obj->primaryKey == $name) {
|
|
$value['key'] = 'primary';
|
|
}
|
|
if (!isset($db->columns[$value['type']])) {
|
|
trigger_error(sprintf(__('Schema generation error: invalid column type %s does not exist in DBO', true), $value['type']), E_USER_NOTICE);
|
|
continue;
|
|
} else {
|
|
$defaultCol = $db->columns[$value['type']];
|
|
if (isset($defaultCol['limit']) && $defaultCol['limit'] == $value['length']) {
|
|
unset($value['length']);
|
|
} elseif (isset($defaultCol['length']) && $defaultCol['length'] == $value['length']) {
|
|
unset($value['length']);
|
|
}
|
|
unset($value['limit']);
|
|
}
|
|
|
|
if (isset($value['default']) && ($value['default'] === '' || $value['default'] === false)) {
|
|
unset($value['default']);
|
|
}
|
|
if (empty($value['length'])) {
|
|
unset($value['length']);
|
|
}
|
|
if (empty($value['key'])) {
|
|
unset($value['key']);
|
|
}
|
|
$columns[$name] = $value;
|
|
}
|
|
|
|
return $columns;
|
|
}
|
|
|
|
/**
|
|
* Compare two schema files table Parameters
|
|
*
|
|
* @param array $new New indexes
|
|
* @param array $old Old indexes
|
|
* @return mixed False on failure, or an array of parameters to add & drop.
|
|
*/
|
|
function _compareTableParameters($new, $old) {
|
|
if (!is_array($new) || !is_array($old)) {
|
|
return false;
|
|
}
|
|
$change = $this->_arrayDiffAssoc($new, $old);
|
|
return $change;
|
|
}
|
|
|
|
/**
|
|
* Compare two schema indexes
|
|
*
|
|
* @param array $new New indexes
|
|
* @param array $old Old indexes
|
|
* @return mixed false on failure or array of indexes to add and drop
|
|
*/
|
|
function _compareIndexes($new, $old) {
|
|
if (!is_array($new) || !is_array($old)) {
|
|
return false;
|
|
}
|
|
|
|
$add = $drop = array();
|
|
|
|
$diff = $this->_arrayDiffAssoc($new, $old);
|
|
if (!empty($diff)) {
|
|
$add = $diff;
|
|
}
|
|
|
|
$diff = $this->_arrayDiffAssoc($old, $new);
|
|
if (!empty($diff)) {
|
|
$drop = $diff;
|
|
}
|
|
|
|
foreach ($new as $name => $value) {
|
|
if (isset($old[$name])) {
|
|
$newUnique = isset($value['unique']) ? $value['unique'] : 0;
|
|
$oldUnique = isset($old[$name]['unique']) ? $old[$name]['unique'] : 0;
|
|
$newColumn = $value['column'];
|
|
$oldColumn = $old[$name]['column'];
|
|
|
|
$diff = false;
|
|
|
|
if ($newUnique != $oldUnique) {
|
|
$diff = true;
|
|
} elseif (is_array($newColumn) && is_array($oldColumn)) {
|
|
$diff = ($newColumn !== $oldColumn);
|
|
} elseif (is_string($newColumn) && is_string($oldColumn)) {
|
|
$diff = ($newColumn != $oldColumn);
|
|
} else {
|
|
$diff = true;
|
|
}
|
|
if ($diff) {
|
|
$drop[$name] = null;
|
|
$add[$name] = $value;
|
|
}
|
|
}
|
|
}
|
|
return array_filter(compact('add', 'drop'));
|
|
}
|
|
}
|