mirror of
https://github.com/kamilwylegala/cakephp2-php8.git
synced 2025-01-31 17:16:18 +00:00
144b556d1f
Just like physical table name, the schema name is an important information that should be available in models. The property will be populated accordingly by the model's datasource.
563 lines
15 KiB
PHP
563 lines
15 KiB
PHP
<?php
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/**
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* SQLite layer for DBO
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*
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* PHP 5
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright 2005-2011, 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 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package Cake.Model.Datasource.Database
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* @since CakePHP(tm) v 0.9.0
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* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
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*/
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App::uses('DboSource', 'Model/Datasource');
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App::uses('String', 'Utility');
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/**
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* DBO implementation for the SQLite3 DBMS.
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*
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* A DboSource adapter for SQLite 3 using PDO
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*
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* @package Cake.Model.Datasource.Database
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*/
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class Sqlite extends DboSource {
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/**
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* Datasource Description
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*
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* @var string
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*/
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public $description = "SQLite DBO Driver";
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/**
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* Quote Start
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*
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* @var string
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*/
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public $startQuote = '"';
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/**
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* Quote End
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*
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* @var string
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*/
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public $endQuote = '"';
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/**
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* Base configuration settings for SQLite3 driver
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*
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* @var array
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*/
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protected $_baseConfig = array(
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'persistent' => false,
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'database' => null
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);
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/**
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* SQLite3 column definition
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*
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* @var array
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*/
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public $columns = array(
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'primary_key' => array('name' => 'integer primary key autoincrement'),
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'string' => array('name' => 'varchar', 'limit' => '255'),
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'text' => array('name' => 'text'),
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'integer' => array('name' => 'integer', 'limit' => null, 'formatter' => 'intval'),
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'float' => array('name' => 'float', 'formatter' => 'floatval'),
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'datetime' => array('name' => 'datetime', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
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'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
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'time' => array('name' => 'time', 'format' => 'H:i:s', 'formatter' => 'date'),
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'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'),
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'binary' => array('name' => 'blob'),
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'boolean' => array('name' => 'boolean')
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);
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/**
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* List of engine specific additional field parameters used on table creating
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*
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* @var array
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*/
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public $fieldParameters = array(
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'collate' => array(
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'value' => 'COLLATE',
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'quote' => false,
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'join' => ' ',
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'column' => 'Collate',
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'position' => 'afterDefault',
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'options' => array(
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'BINARY', 'NOCASE', 'RTRIM'
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)
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),
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);
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/**
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* Connects to the database using config['database'] as a filename.
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*
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* @return boolean
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* @throws MissingConnectionException
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*/
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public function connect() {
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$config = $this->config;
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$flags = array(
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PDO::ATTR_PERSISTENT => $config['persistent'],
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
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);
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try {
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$this->_connection = new PDO('sqlite:' . $config['database'], null, null, $flags);
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$this->connected = true;
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} catch(PDOException $e) {
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throw new MissingConnectionException(array('class' => $e->getMessage()));
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}
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return $this->connected;
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}
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/**
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* Check whether the MySQL extension is installed/loaded
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*
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* @return boolean
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*/
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public function enabled() {
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return in_array('sqlite', PDO::getAvailableDrivers());
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}
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/**
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* Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
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*
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* @param mixed $data
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* @return array Array of tablenames in the database
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*/
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public function listSources($data = null) {
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$cache = parent::listSources();
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if ($cache != null) {
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return $cache;
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}
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$result = $this->fetchAll("SELECT name FROM sqlite_master WHERE type='table' ORDER BY name;", false);
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if (!$result || empty($result)) {
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return array();
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} else {
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$tables = array();
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foreach ($result as $table) {
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$tables[] = $table[0]['name'];
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}
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parent::listSources($tables);
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return $tables;
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}
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return array();
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}
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/**
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* Returns an array of the fields in given table name.
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*
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* @param Model|string $model Either the model or table name you want described.
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* @return array Fields in table. Keys are name and type
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*/
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public function describe($model) {
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$cache = parent::describe($model);
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if ($cache != null) {
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return $cache;
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}
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$table = $this->fullTableName($model, false, false);
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$fields = array();
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$result = $this->_execute('PRAGMA table_info(' . $table . ')');
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foreach ($result as $column) {
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$column = (array) $column;
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$default = ($column['dflt_value'] === 'NULL') ? null : trim($column['dflt_value'], "'");
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$fields[$column['name']] = array(
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'type' => $this->column($column['type']),
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'null' => !$column['notnull'],
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'default' => $default,
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'length' => $this->length($column['type'])
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);
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if ($column['pk'] == 1) {
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$fields[$column['name']]['key'] = $this->index['PRI'];
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$fields[$column['name']]['null'] = false;
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if (empty($fields[$column['name']]['length'])) {
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$fields[$column['name']]['length'] = 11;
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}
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}
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}
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$result->closeCursor();
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$this->_cacheDescription($table, $fields);
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return $fields;
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}
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/**
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* Generates and executes an SQL UPDATE statement for given model, fields, and values.
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*
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* @param Model $model
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* @param array $fields
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* @param array $values
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* @param mixed $conditions
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* @return array
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*/
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public function update(Model $model, $fields = array(), $values = null, $conditions = null) {
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if (empty($values) && !empty($fields)) {
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foreach ($fields as $field => $value) {
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if (strpos($field, $model->alias . '.') !== false) {
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unset($fields[$field]);
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$field = str_replace($model->alias . '.', "", $field);
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$field = str_replace($model->alias . '.', "", $field);
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$fields[$field] = $value;
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}
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}
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}
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return parent::update($model, $fields, $values, $conditions);
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}
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/**
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* Deletes all the records in a table and resets the count of the auto-incrementing
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* primary key, where applicable.
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*
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* @param mixed $table A string or model class representing the table to be truncated
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* @return boolean SQL TRUNCATE TABLE statement, false if not applicable.
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*/
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public function truncate($table) {
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$this->_execute('DELETE FROM sqlite_sequence where name=' . $this->startQuote . $this->fullTableName($table, false, false) . $this->endQuote);
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return $this->execute('DELETE FROM ' . $this->fullTableName($table));
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}
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/**
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* Converts database-layer column types to basic types
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*
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* @param string $real Real database-layer column type (i.e. "varchar(255)")
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* @return string Abstract column type (i.e. "string")
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*/
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public function column($real) {
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if (is_array($real)) {
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$col = $real['name'];
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if (isset($real['limit'])) {
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$col .= '('.$real['limit'].')';
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}
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return $col;
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}
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$col = strtolower(str_replace(')', '', $real));
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$limit = null;
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@list($col, $limit) = explode('(', $col);
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if (in_array($col, array('text', 'integer', 'float', 'boolean', 'timestamp', 'date', 'datetime', 'time'))) {
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return $col;
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}
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if (strpos($col, 'char') !== false) {
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return 'string';
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}
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if (in_array($col, array('blob', 'clob'))) {
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return 'binary';
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}
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if (strpos($col, 'numeric') !== false || strpos($col, 'decimal') !== false) {
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return 'float';
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}
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return 'text';
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}
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/**
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* Generate ResultSet
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*
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* @param mixed $results
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* @return void
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*/
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public function resultSet($results) {
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$this->results = $results;
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$this->map = array();
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$num_fields = $results->columnCount();
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$index = 0;
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$j = 0;
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//PDO::getColumnMeta is experimental and does not work with sqlite3,
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// so try to figure it out based on the querystring
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$querystring = $results->queryString;
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if (stripos($querystring, 'SELECT') === 0) {
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$last = strripos($querystring, 'FROM');
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if ($last !== false) {
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$selectpart = substr($querystring, 7, $last - 8);
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$selects = String::tokenize($selectpart, ',', '(', ')');
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}
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} elseif (strpos($querystring, 'PRAGMA table_info') === 0) {
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$selects = array('cid', 'name', 'type', 'notnull', 'dflt_value', 'pk');
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} elseif(strpos($querystring, 'PRAGMA index_list') === 0) {
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$selects = array('seq', 'name', 'unique');
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} elseif(strpos($querystring, 'PRAGMA index_info') === 0) {
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$selects = array('seqno', 'cid', 'name');
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}
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while ($j < $num_fields) {
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if (!isset($selects[$j])) {
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$j++;
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continue;
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}
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if (preg_match('/\bAS\s+(.*)/i', $selects[$j], $matches)) {
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$columnName = trim($matches[1],'"');
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} else {
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$columnName = trim(str_replace('"', '', $selects[$j]));
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}
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if (strpos($selects[$j], 'DISTINCT') === 0) {
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$columnName = str_ireplace('DISTINCT', '', $columnName);
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}
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$metaType = false;
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try {
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$metaData = (array)$results->getColumnMeta($j);
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if (!empty($metaData['sqlite:decl_type'])) {
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$metaType = trim($metaData['sqlite:decl_type']);
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}
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} catch (Exception $e) {}
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if (strpos($columnName, '.')) {
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$parts = explode('.', $columnName);
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$this->map[$index++] = array(trim($parts[0]), trim($parts[1]), $metaType);
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} else {
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$this->map[$index++] = array(0, $columnName, $metaType);
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}
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$j++;
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}
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}
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/**
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* Fetches the next row from the current result set
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*
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* @return mixed array with results fetched and mapped to column names or false if there is no results left to fetch
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*/
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public function fetchResult() {
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if ($row = $this->_result->fetch()) {
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$resultRow = array();
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foreach ($this->map as $col => $meta) {
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list($table, $column, $type) = $meta;
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$resultRow[$table][$column] = $row[$col];
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if ($type == 'boolean' && !is_null($row[$col])) {
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$resultRow[$table][$column] = $this->boolean($resultRow[$table][$column]);
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}
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}
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return $resultRow;
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} else {
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$this->_result->closeCursor();
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return false;
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}
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}
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/**
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* Returns a limit statement in the correct format for the particular database.
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*
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* @param integer $limit Limit of results returned
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* @param integer $offset Offset from which to start results
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* @return string SQL limit/offset statement
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*/
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public function limit($limit, $offset = null) {
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if ($limit) {
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$rt = '';
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if (!strpos(strtolower($limit), 'limit') || strpos(strtolower($limit), 'limit') === 0) {
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$rt = ' LIMIT';
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}
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$rt .= ' ' . $limit;
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if ($offset) {
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$rt .= ' OFFSET ' . $offset;
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}
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return $rt;
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}
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return null;
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}
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/**
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* Generate a database-native column schema string
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*
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* @param array $column An array structured like the following: array('name'=>'value', 'type'=>'value'[, options]),
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* where options can be 'default', 'length', or 'key'.
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* @return string
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*/
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public function buildColumn($column) {
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$name = $type = null;
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$column = array_merge(array('null' => true), $column);
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extract($column);
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if (empty($name) || empty($type)) {
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trigger_error(__d('cake_dev', 'Column name or type not defined in schema'), E_USER_WARNING);
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return null;
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}
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if (!isset($this->columns[$type])) {
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trigger_error(__d('cake_dev', 'Column type %s does not exist', $type), E_USER_WARNING);
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return null;
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}
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$real = $this->columns[$type];
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$out = $this->name($name) . ' ' . $real['name'];
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if (isset($column['key']) && $column['key'] == 'primary' && $type == 'integer') {
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return $this->name($name) . ' ' . $this->columns['primary_key']['name'];
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}
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return parent::buildColumn($column);
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}
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/**
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* Sets the database encoding
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*
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* @param string $enc Database encoding
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* @return boolean
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*/
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public function setEncoding($enc) {
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if (!in_array($enc, array("UTF-8", "UTF-16", "UTF-16le", "UTF-16be"))) {
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return false;
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}
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return $this->_execute("PRAGMA encoding = \"{$enc}\"") !== false;
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}
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/**
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* Gets the database encoding
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*
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* @return string The database encoding
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*/
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public function getEncoding() {
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return $this->fetchRow('PRAGMA encoding');
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}
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/**
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* Removes redundant primary key indexes, as they are handled in the column def of the key.
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*
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* @param array $indexes
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* @param string $table
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* @return string
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*/
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public function buildIndex($indexes, $table = null) {
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$join = array();
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$table = str_replace('"', '', $table);
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list($dbname, $table) = explode('.', $table);
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$dbname = $this->name($dbname);
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foreach ($indexes as $name => $value) {
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if ($name == 'PRIMARY') {
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continue;
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}
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$out = 'CREATE ';
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if (!empty($value['unique'])) {
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$out .= 'UNIQUE ';
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}
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if (is_array($value['column'])) {
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$value['column'] = join(', ', array_map(array(&$this, 'name'), $value['column']));
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} else {
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$value['column'] = $this->name($value['column']);
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}
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$t = trim($table, '"');
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$indexname = $this->name($t . '_' .$name);
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$table = $this->name($table);
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$out .= "INDEX {$dbname}.{$indexname} ON {$table}({$value['column']});";
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$join[] = $out;
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}
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return $join;
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}
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/**
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* Overrides DboSource::index to handle SQLite indexe introspection
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* Returns an array of the indexes in given table name.
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*
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* @param string $model Name of model to inspect
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* @return array Fields in table. Keys are column and unique
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*/
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public function index($model) {
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$index = array();
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$table = $this->fullTableName($model, false, false);
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if ($table) {
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$indexes = $this->query('PRAGMA index_list(' . $table . ')');
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if (is_bool($indexes)) {
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return array();
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}
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foreach ($indexes as $i => $info) {
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$key = array_pop($info);
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$keyInfo = $this->query('PRAGMA index_info("' . $key['name'] . '")');
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foreach ($keyInfo as $keyCol) {
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if (!isset($index[$key['name']])) {
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$col = array();
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if (preg_match('/autoindex/', $key['name'])) {
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$key['name'] = 'PRIMARY';
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}
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$index[$key['name']]['column'] = $keyCol[0]['name'];
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$index[$key['name']]['unique'] = intval($key['unique'] == 1);
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} else {
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if (!is_array($index[$key['name']]['column'])) {
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$col[] = $index[$key['name']]['column'];
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}
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$col[] = $keyCol[0]['name'];
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$index[$key['name']]['column'] = $col;
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}
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}
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}
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}
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return $index;
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}
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/**
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* Overrides DboSource::renderStatement to handle schema generation with SQLite-style indexes
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*
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* @param string $type
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* @param array $data
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* @return string
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*/
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public function renderStatement($type, $data) {
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switch (strtolower($type)) {
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case 'schema':
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extract($data);
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if (is_array($columns)) {
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$columns = "\t" . join(",\n\t", array_filter($columns));
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}
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if (is_array($indexes)) {
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$indexes = "\t" . join("\n\t", array_filter($indexes));
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}
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return "CREATE TABLE {$table} (\n{$columns});\n{$indexes}";
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break;
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default:
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return parent::renderStatement($type, $data);
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break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* PDO deals in objects, not resources, so overload accordingly.
|
|
*
|
|
* @return boolean
|
|
*/
|
|
public function hasResult() {
|
|
return is_object($this->_result);
|
|
}
|
|
|
|
/**
|
|
* Generate a "drop table" statement for the given Schema object
|
|
*
|
|
* @param CakeSchema $schema An instance of a subclass of CakeSchema
|
|
* @param string $table Optional. If specified only the table name given will be generated.
|
|
* Otherwise, all tables defined in the schema are generated.
|
|
* @return string
|
|
*/
|
|
public function dropSchema(CakeSchema $schema, $table = null) {
|
|
$out = '';
|
|
foreach ($schema->tables as $curTable => $columns) {
|
|
if (!$table || $table == $curTable) {
|
|
$out .= 'DROP TABLE IF EXISTS ' . $this->fullTableName($curTable) . ";\n";
|
|
}
|
|
}
|
|
return $out;
|
|
}
|
|
|
|
/**
|
|
* Gets the schema name
|
|
*
|
|
* @return string The schema name
|
|
*/
|
|
public function getSchemaName() {
|
|
return "main"; // Sqlite Datasource does not support multidb
|
|
}
|
|
|
|
}
|