www.gusucode.com > FavShop网店系统源码程序 > FavShop网店系统 1.0/upload/cake/libs/model/datasources/dbo/dbo_sqlite.php
<?php
/* SVN FILE: $Id: dbo_sqlite.php 6311 2008-01-02 06:33:52Z phpnut $ */
/**
* SQLite layer for DBO
*
* Long description for file
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
* Copyright 2005-2008, Cake Software Foundation, Inc.
* 1785 E. Sahara Avenue, Suite 490-204
* Las Vegas, Nevada 89104
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @filesource
* @copyright Copyright 2005-2008, Cake Software Foundation, Inc.
* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs.model.datasources.dbo
* @since CakePHP(tm) v 0.9.0
* @version $Revision: 6311 $
* @modifiedby $LastChangedBy: phpnut $
* @lastmodified $Date: 2008-01-02 00:33:52 -0600 (Wed, 02 Jan 2008) $
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
/**
* DBO implementation for the SQLite DBMS.
*
* Long description for class
*
* @package cake
* @subpackage cake.cake.libs.model.datasources.dbo
*/
class DboSqlite extends DboSource {
/**
* Enter description here...
*
* @var unknown_type
*/
var $description = "SQLite DBO Driver";
/**
* Enter description here...
*
* @var unknown_type
*/
var $startQuote = '"';
/**
* Enter description here...
*
* @var unknown_type
*/
var $endQuote = '"';
/**
* Base configuration settings for SQLite driver
*
* @var array
*/
var $_baseConfig = array(
'persistent' => true,
'database' => null,
'connect' => 'sqlite_popen'
);
/**
* SQLite column definition
*
* @var array
*/
var $columns = array(
'primary_key' => array('name' => 'integer primary key'),
'string' => array('name' => 'varchar', 'limit' => '255'),
'text' => array('name' => 'text'),
'integer' => array('name' => 'integer', 'limit' => '11', 'formatter' => 'intval'),
'float' => array('name' => 'float', 'formatter' => 'floatval'),
'datetime' => array('name' => 'timestamp', 'format' => 'YmdHis', 'formatter' => 'date'),
'timestamp' => array('name' => 'timestamp', 'format' => 'YmdHis', 'formatter' => 'date'),
'time' => array('name' => 'timestamp', 'format' => 'His', 'formatter' => 'date'),
'date' => array('name' => 'date', 'format' => 'Ymd', 'formatter' => 'date'),
'binary' => array('name' => 'blob'),
'boolean' => array('name' => 'integer', 'limit' => '1')
);
/**
* Connects to the database using config['database'] as a filename.
*
* @param array $config Configuration array for connecting
* @return mixed
*/
function connect() {
$config = $this->config;
$this->connection = $config['connect']($config['database']);
$this->connected = is_resource($this->connection);
return $this->connected;
}
/**
* Disconnects from database.
*
* @return boolean True if the database could be disconnected, else false
*/
function disconnect() {
@sqlite_close($this->connection);
$this->connected = false;
return $this->connected;
}
/**
* Executes given SQL statement.
*
* @param string $sql SQL statement
* @return resource Result resource identifier
*/
function _execute($sql) {
return sqlite_query($this->connection, $sql);
}
/**
* Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
*
* @return array Array of tablenames in the database
*/
function listSources() {
$db = $this->config['database'];
$this->config['database'] = basename($this->config['database']);
$cache = parent::listSources();
if ($cache != null) {
return $cache;
}
$result = $this->fetchAll("SELECT name FROM sqlite_master WHERE type='table' ORDER BY name;");
if (!$result || empty($result)) {
return array();
} else {
$tables = array();
foreach ($result as $table) {
$tables[] = $table[0]['name'];
}
parent::listSources($tables);
$this->config['database'] = $db;
return $tables;
}
$this->config['database'] = $db;
return array();
}
/**
* Returns an array of the fields in given table name.
*
* @param string $tableName Name of database table to inspect
* @return array Fields in table. Keys are name and type
*/
function describe(&$model) {
$cache = parent::describe($model);
if ($cache != null) {
return $cache;
}
$fields = array();
$result = $this->fetchAll('PRAGMA table_info(' . $model->tablePrefix . $model->table . ')');
foreach ($result as $column) {
$fields[$column[0]['name']] = array(
'type' => $this->column($column[0]['type']),
'null' => !$column[0]['notnull'],
'default' => $column[0]['dflt_value'],
'length' => $this->length($column[0]['type'])
);
if($column[0]['pk'] == 1) {
$fields[$column[0]['name']] = array(
'type' => $fields[$column[0]['name']]['type'],
'null' => false,
'default' => $column[0]['dflt_value'],
'key' => $this->index['PRI'],
'extra' => 'auto_increment',
'length' => $this->columns['integer']['limit']
);
}
}
$this->__cacheDescription($model->tablePrefix . $model->table, $fields);
return $fields;
}
/**
* Returns a quoted and escaped string of $data for use in an SQL statement.
*
* @param string $data String to be prepared for use in an SQL statement
* @return string Quoted and escaped
*/
function value ($data, $column = null, $safe = false) {
$parent = parent::value($data, $column, $safe);
if ($parent != null) {
return $parent;
}
if ($data === null) {
return 'NULL';
}
if ($data === '') {
return "''";
}
switch ($column) {
case 'boolean':
$data = $this->boolean((bool)$data);
break;
default:
$data = sqlite_escape_string($data);
break;
}
return "'" . $data . "'";
}
/**
* Begin a transaction
*
* @param unknown_type $model
* @return boolean True on success, false on fail
* (i.e. if the database/model does not support transactions).
*/
function begin (&$model) {
if (parent::begin($model)) {
if ($this->execute('BEGIN')) {
$this->_transactionStarted = true;
return true;
}
}
return false;
}
/**
* Commit a transaction
*
* @param unknown_type $model
* @return boolean True on success, false on fail
* (i.e. if the database/model does not support transactions,
* or a transaction has not started).
*/
function commit (&$model) {
if (parent::commit($model)) {
$this->_transactionStarted = false;
return $this->execute('COMMIT');
}
return false;
}
/**
* Rollback a transaction
*
* @param unknown_type $model
* @return boolean True on success, false on fail
* (i.e. if the database/model does not support transactions,
* or a transaction has not started).
*/
function rollback (&$model) {
if (parent::rollback($model)) {
return $this->execute('ROLLBACK');
}
return false;
}
/**
* Deletes all the records in a table and resets the count of the auto-incrementing
* primary key, where applicable.
*
* @param mixed $table A string or model class representing the table to be truncated
* @return boolean SQL TRUNCATE TABLE statement, false if not applicable.
* @access public
*/
function truncate($table) {
return $this->execute('DELETE From ' . $this->fullTableName($table));
}
/**
* Returns a formatted error message from previous database operation.
*
* @return string Error message
*/
function lastError() {
$error = sqlite_last_error($this->connection);
if ($error) {
return $error.': '.sqlite_error_string($error);
}
return null;
}
/**
* Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.
*
* @return integer Number of affected rows
*/
function lastAffected() {
if ($this->_result) {
return sqlite_changes($this->connection);
}
return false;
}
/**
* Returns number of rows in previous resultset. If no previous resultset exists,
* this returns false.
*
* @return integer Number of rows in resultset
*/
function lastNumRows() {
if ($this->_result) {
sqlite_num_rows($this->_result);
}
return false;
}
/**
* Returns the ID generated from the previous INSERT operation.
*
* @return int
*/
function lastInsertId() {
return sqlite_last_insert_rowid($this->connection);
}
/**
* Converts database-layer column types to basic types
*
* @param string $real Real database-layer column type (i.e. "varchar(255)")
* @return string Abstract column type (i.e. "string")
*/
function column($real) {
if (is_array($real)) {
$col = $real['name'];
if (isset($real['limit'])) {
$col .= '('.$real['limit'].')';
}
return $col;
}
$col = strtolower(str_replace(')', '', $real));
$limit = null;
@list($col, $limit) = explode('(', $col);
if (in_array($col, array('text', 'integer', 'float', 'boolean', 'timestamp', 'datetime'))) {
return $col;
}
if (strpos($col, 'varchar') !== false) {
return 'string';
}
if (in_array($col, array('blob', 'clob'))) {
return 'binary';
}
if (strpos($col, 'numeric') !== false) {
return 'float';
}
return 'text';
}
/**
* Enter description here...
*
* @param unknown_type $results
*/
function resultSet(&$results) {
$this->results =& $results;
$this->map = array();
$num_fields = sqlite_num_fields($results);
$index = 0;
$j = 0;
while ($j < $num_fields) {
$columnName = str_replace('"', '', sqlite_field_name($results, $j));
if (strpos($columnName, '.')) {
$parts = explode('.', $columnName);
$this->map[$index++] = array($parts[0], $parts[1]);
} else {
$this->map[$index++] = array(0, $columnName);
}
$j++;
}
}
/**
* Fetches the next row from the current result set
*
* @return unknown
*/
function fetchResult() {
if ($row = sqlite_fetch_array($this->results, SQLITE_ASSOC)) {
$resultRow = array();
$i = 0;
foreach ($row as $index => $field) {
if (strpos($index, '.')) {
list($table, $column) = explode('.', str_replace('"', '', $index));
$resultRow[$table][$column] = $row[$index];
} else {
$resultRow[0][str_replace('"', '', $index)] = $row[$index];
}
$i++;
}
return $resultRow;
} else {
return false;
}
}
/**
* Returns a limit statement in the correct format for the particular database.
*
* @param integer $limit Limit of results returned
* @param integer $offset Offset from which to start results
* @return string SQL limit/offset statement
*/
function limit ($limit, $offset = null) {
if ($limit) {
$rt = '';
if (!strpos(strtolower($limit), 'limit') || strpos(strtolower($limit), 'limit') === 0) {
$rt = ' LIMIT';
}
$rt .= ' ' . $limit;
if ($offset) {
$rt .= ' OFFSET ' . $offset;
}
return $rt;
}
return null;
}
/**
* Inserts multiple values into a join table
*
* @param string $table
* @param string $fields
* @param array $values
*/
function insertMulti($table, $fields, $values) {
parent::__insertMulti($table, $fields, $values);
}
/**
* Generate a database-native column schema string
*
* @param array $column An array structured like the following: array('name'=>'value', 'type'=>'value'[, options]),
* where options can be 'default', 'length', or 'key'.
* @return string
*/
function buildColumn($column) {
$name = $type = null;
$column = array_merge(array('null' => true), $column);
extract($column);
if (empty($name) || empty($type)) {
trigger_error('Column name or type not defined in schema', E_USER_WARNING);
return null;
}
if (!isset($this->columns[$type])) {
trigger_error("Column type {$type} does not exist", E_USER_WARNING);
return null;
}
$real = $this->columns[$type];
if (isset($column['key']) && $column['key'] == 'primary') {
$out = $this->name($name) . ' ' . $this->columns['primary_key']['name'];
} else {
$out = $this->name($name) . ' ' . $real['name'];
if (isset($real['limit']) || isset($real['length']) || isset($column['limit']) || isset($column['length'])) {
if (isset($column['length'])) {
$length = $column['length'];
} elseif (isset($column['limit'])) {
$length = $column['limit'];
} elseif (isset($real['length'])) {
$length = $real['length'];
} else {
$length = $real['limit'];
}
$out .= '(' . $length . ')';
}
if (isset($column['key']) && $column['key'] == 'primary') {
$out .= ' NOT NULL';
} elseif (isset($column['default']) && isset($column['null']) && $column['null'] == false) {
$out .= ' DEFAULT ' . $this->value($column['default'], $type) . ' NOT NULL';
} elseif (isset($column['default'])) {
$out .= ' DEFAULT ' . $this->value($column['default'], $type);
} elseif (isset($column['null']) && $column['null'] == true) {
$out .= ' DEFAULT NULL';
} elseif (isset($column['null']) && $column['null'] == false) {
$out .= ' NOT NULL';
}
}
return $out;
}
}
?>