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<?php // +---------------------------------------------------------------------- // | ThinkPHP [ WE CAN DO IT JUST THINK IT ] // +---------------------------------------------------------------------- // | Copyright (c) 2009 http://thinkphp.cn All rights reserved. // +---------------------------------------------------------------------- // | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 ) // +---------------------------------------------------------------------- // | Author: liu21st <liu21st@gmail.com> // +---------------------------------------------------------------------- // $Id$ define('HAS_ONE',1); define('BELONGS_TO',2); define('HAS_MANY',3); define('MANY_TO_MANY',4); /** +------------------------------------------------------------------------------ * ThinkPHP Model模型类 * 实现了ORM和ActiveRecords模式 +------------------------------------------------------------------------------ * @category Think * @package Think * @subpackage Core * @author liu21st <liu21st@gmail.com> * @version $Id$ +------------------------------------------------------------------------------ */ class Model extends Think { // 操作状态 const MODEL_INSERT = 1; // 插入模型数据 const MODEL_UPDATE = 2; // 更新模型数据 const MODEL_BOTH = 3; // 包含上面两种方式 const MUST_VALIDATE = 1;// 必须验证 const EXISTS_VAILIDATE = 0;// 表单存在字段则验证 const VALUE_VAILIDATE = 2;// 表单值不为空则验证 // 当前使用的扩展模型 private $_extModel = null; // 当前数据库操作对象 protected $db = null; // 主键名称 protected $pk = 'id'; // 数据表前缀 protected $tablePrefix = ''; // 数据表后缀 protected $tableSuffix = ''; // 模型名称 protected $name = ''; // 数据库名称 protected $dbName = ''; // 数据表名（不包含表前缀） protected $tableName = ''; // 实际数据表名（包含表前缀） protected $trueTableName =''; // 最近错误信息 protected $error = ''; // 字段信息 protected $fields = array(); // 数据信息 protected $data = array(); // 查询表达式参数 protected $options = array(); protected $_validate = array(); // 自动验证定义 protected $_auto = array(); // 自动完成定义 protected $_map = array(); // 字段映射定义 // 是否自动检测数据表字段信息 protected $autoCheckFields = true; /** +---------------------------------------------------------- * 架构函数 * 取得DB类的实例对象 字段检查 +---------------------------------------------------------- * @param string $name 模型名称 +---------------------------------------------------------- * @access public +---------------------------------------------------------- */ public function __construct($name='') { // 模型初始化 $this->_initialize(); // 获取模型名称 if(!empty($name)) { $this->name = $name; }elseif(empty($this->name)){ $this->name = $this->getModelName(); } // 数据库初始化操作 // 获取数据库操作对象 // 当前模型有独立的数据库连接信息 $this->db = Db::getInstance(empty($this->connection)?'':$this->connection); // 设置表前缀 $this->tablePrefix = $this->tablePrefix?$this->tablePrefix:C('DB_PREFIX'); $this->tableSuffix = $this->tableSuffix?$this->tableSuffix:C('DB_SUFFIX'); // 字段检测 if(!empty($this->name) && $this->autoCheckFields) $this->_checkTableInfo(); } /** +---------------------------------------------------------- * 自动检测数据表信息 +---------------------------------------------------------- * @access protected +---------------------------------------------------------- * @return void +---------------------------------------------------------- */ protected function _checkTableInfo() { // 如果不是Model类 自动记录数据表信息 // 只在第一次执行记录 if(empty($this->fields)) { // 如果数据表字段没有定义则自动获取 if(C('DB_FIELDS_CACHE')) { $this->fields = F('_fields/'.$this->name); if(!$this->fields) $this->flush(); }else{ // 每次都会读取数据表信息 $this->flush(); } } } /** +---------------------------------------------------------- * 获取字段信息并缓存 +---------------------------------------------------------- * @access public +---------------------------------------------------------- * @return void +---------------------------------------------------------- */ public function flush() { // 缓存不存在则查询数据表信息 $fields = $this->db->getFields($this->getTableName()); $this->fields = array_keys($fields); $this->fields['_autoinc'] = false; foreach ($fields as $key=>$val){ // 记录字段类型 $type[$key] = $val['type']; if($val['primary']) { $this->fields['_pk'] = $key; if($val['autoinc']) $this->fields['_autoinc'] = true; } } // 记录字段类型信息 if(C('DB_FIELDTYPE_CHECK')) $this->fields['_type'] = $type; // 2008-3-7 增加缓存开关控制 if(C('DB_FIELDS_CACHE')) // 永久缓存数据表信息 F('_fields/'.$this->name,$this->fields); } /** +---------------------------------------------------------- * 动态切换扩展模型 +---------------------------------------------------------- * @access public +---------------------------------------------------------- * @param string $type 模型类型名称 * @param mixed $vars 要传入扩展模型的属性变量 +---------------------------------------------------------- * @return Model +---------------------------------------------------------- */ public function switchModel($type,$vars=array()) { $class = ucwords(strtolower($type)).'Model'; if(!class_exists($class)) throw_exception($class.L('_MODEL_NOT_EXIST_')); // 实例化扩展模型 $this->_extModel = new $class($this->name); if(!empty($vars)) { // 传入当前模型的属性到扩展模型 foreach ($vars as $var) $this->_extModel->setProperty($var,$this->$var); } return $this->_extModel; } /** +---------------------------------------------------------- * 设置数据对象的值 +---------------------------------------------------------- * @access public +---------------------------------------------------------- * @param string $name 名称 * @param mixed $value 值 +---------------------------------------------------------- * @return void +---------------------------------------------------------- */ public function __set($name,$value) { // 设置数据对象属性 $this->data[$name] = $value; } /** +---------------------------------------------------------- * 获取数据对象的值 +---------------------------------------------------------- * @access public +-----------------------------------