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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>
- // +----------------------------------------------------------------------
- /**
- * ThinkPHP Phprpc模式Model模型类
- * 只支持CURD和连贯操作 以及常用查询 去掉回调接口
- */
- class Model {
- // 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 = '';
- // 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 ='';
- // 数据信息
- protected $data = array();
- // 查询表达式参数
- protected $options = array();
- // 最近错误信息
- protected $error = '';
- /**
- * 架构函数
- * 取得DB类的实例对象
- * @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
- $this->db = Db::getInstance(empty($this->connection)?'':$this->connection);
- // 设置表前缀
- $this->tablePrefix = $this->tablePrefix?$this->tablePrefix:C('DB_PREFIX');
- // 字段检测
- if(!empty($this->name)) $this->_checkTableInfo();
- }
- /**
- * 自动检测数据表信息
- * @access protected
- * @return void
- */
- protected function _checkTableInfo() {
- // 如果不是Model类 自动记录数据表信息
- // 只在第一次执行记录
- if(empty($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);
- }
- // 回调方法 初始化模型
- protected function _initialize() {}
- /**
- * 利用__call方法实现一些特殊的Model方法 (魔术方法)
- * @access public
- * @param string $method 方法名称
- * @param array $args 调用参数
- * @return mixed
- */
- public function __call($method,$args) {
- if(in_array(strtolower($method),array('field','table','where','order','limit','page','having','group','lock','distinct'),true)) {
- // 连贯操作的实现
- $this->options[strtolower($method)] = $args[0];
- return $this;
- }elseif(in_array(strtolower($method),array('count','sum','min','max','avg'),true)){
- // 统计查询的实现
- $field = isset($args[0])?$args[0]:'*';
- return $this->getField(strtoupper($method).'('.$field.') AS tp_'.$method);
- }elseif(strtolower(substr($method,0,5))=='getby') {
- // 根据某个字段获取记录
- $field = parse_name(substr($method,5));
- $options['where'] = $field.'=\''.$args[0].'\'';
- return $this->find($options);
- }else{
- throw_exception(__CLASS__.':'.$method.L('_METHOD_NOT_EXIST_'));
- return;
- }
- }
- /**
- * 设置数据对象的值 (魔术方法)
- * @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 (魔术方法)
- * @access public
- * @param string $name 名称
- * @return mixed
- */
- public function __get($name) {
- return isset($this->data[$name])?$this->data[$name]:null;
- }
- /**
- * 新增数据
- * @access public
- * @param mixed $data 数据
- * @param array $options 表达式
- * @return mixed
- */
- public function add($data='',$options=array()) {
- if(empty($data)) {
- // 没有传递数据,获取当前数据对象的值
- if(!empty($this->data)) {
- $data = $this->data;
- }else{
- $this->error = L('_DATA_TYPE_INVALID_');
- return false;
- }
- }
- // 分析表达式
- $options = $this->_parseOptions($options);
- // 写入数据到数据库
- $result = $this->db->insert($data,$options);
- $insertId = $this->getLastInsID();
- if($insertId) {
- return $insertId;
- }
- //成功后返回插入ID
- return $result;
- }
- /**
- * 保存数据
- * @access public
- * @param mixed $data 数据
- * @param array $options 表达式
- * @return boolean
- */
- public function save($data='',$options=array()) {
- if(empty($data)) {
- // 没有传递数据,获取当前数据对象的值
- if(!empty($this->data)) {
- $data = $this->data;
- }else{
- $this->error = L('_DATA_TYPE_INVALID_');
- return false;
- }
- }
- // 分析表达式
- $options = $this->_parseOptions($options);
- if(!isset($options['where']) ) {
- // 如果存在主键数据 则自动作为更新条件
- if(isset($data[$this->getPk()])) {
- $pk = $this->getPk();
- $options['where'] = $pk.'=\''.$data[$pk].'\'';
- $pkValue = $data[$pk];
- unset($data[$pk]);
- }else{
- // 如果没有任何更新条件则不执行
- $this->error = L('_OPERATION_WRONG_');
- return false;
- }
- }
- return $this->db->update($data,$options);
- }
- /**
- * 删除数据
- * @access public
- * @param mixed $options 表达式
- * @return mixed
- */
- public function delete($options=array()) {
- if(empty($options) && empty($this->options['where'])) {
- // 如果删除条件为空 则删除当前数据对象所对应的记录
- if(!empty($this->data) && isset($this->data[$this->getPk()]))
- return $this->delete($this->data[$this->getPk()]);
- else
- return false;
- }
- if(is_numeric($options) || is_string($options)) {
- // 根据主键删除记录
- $pk = $this->getPk();
- $where = $pk.'=\''.$options.'\'';
- $pkValue = $options;
- $options = array();
- $options['where'] = $where;
- }
- // 分析表达式
- $options = $this->_parseOptions($options);
- return $this->db->delete($options);
- }
- /**
- * 查询数据集
- * @access public
- * @param array $options 表达式参数
- * @return mixed
- */
- public function select($options=array()) {
- // 分析表达式
- $options = $this->_parseOptions($options);
- $resultSet = $this->db->select($options);
- if(empty($resultSet)) { // 查询结果为空
- return false;
- }
- return $resultSet;
- }
- /**
- * 查询数据
- * @access public
- * @param mixed $options 表达式参数
- * @return mixed
- */
- public function find($options=array()) {
- if(is_numeric($options) || is_string($options)) {
- $where = $this->getPk().'=\''.$options.'\'';
- $options = array();
- $options['where'] = $where;
- }
- // 总是查找一条记录
- $options['limit'] = 1;
- // 分析表达式
- $options = $this->_parseOptions($options);
- $resultSet = $this->db->select($options);
- if(empty($resultSet)) {// 查询结果为空
- return false;
- }
- $this->data = $resultSet[0];
- return $this->data;
- }
- /**
- * 分析表达式
- * @access private
- * @param array $options 表达式参数
- * @return array
- */
- private function _parseOptions($options) {
- if(is_array($options))
- $options = array_merge($this->options,$options);
- // 查询过后清空sql表达式组装 避免影响下次查询
- $this->options = array();
- if(!isset($options['table']))
- // 自动获取表名
- $options['table'] =$this->getTableName();
- return $options;
- }
- /**
- * 创建数据对象 但不保存到数据库
- * @access public
- * @param mixed $data 创建数据
- * @param string $type 状态
- * @return mixed
- */
- public function create($data='',$type='') {
- // 如果没有传值默认取POST数据
- if(empty($data)) {
- $data = $_POST;
- }elseif(is_object($data)){
- $data = get_object_vars($data);
- }elseif(!is_array($data)){
- $this->error = L('_DATA_TYPE_INVALID_');
- return false;
- }
- // 生成数据对象
- $vo = array();
- foreach ($this->fields as $key=>$name){
- if(substr($key,0,1)=='_') continue;
- $val = isset($data[$name])?$data[$name]:null;
- //保证赋值有效
- if(!is_null($val)){
- $vo[$name] = (MAGIC_QUOTES_GPC && is_string($val))? stripslashes($val) : $val;
- if(C('DB_FIELDTYPE_CHECK')) {
- // 字段类型检查
- $fieldType = strtolower($this->fields['_type'][$name]);
- if(false !== strpos($fieldType,'int')) {
- $vo[$name] = intval($vo[$name]);
- }elseif(false !== strpos($fieldType,'float') || false !== strpos($fieldType,'double')){
- $vo[$name] = floatval($vo[$name]);
- }
- }
- }
- }
- // 赋值当前数据对象
- $this->data = $vo;
- // 返回创建的数据以供其他调用
- return $vo;
- }
- /**
- * SQL查询
- * @access public
- * @param string $sql SQL指令
- * @return array
- */
- public function query($sql) {
- if(!empty($sql)) {
- if(strpos($sql,'__TABLE__'))
- $sql = str_replace('__TABLE__',$this->getTableName(),$sql);
- return $this->db->query($sql);
- }else{
- return false;
- }
- }
- /**
- * 执行SQL语句
- * @access public
- * @param string $sql SQL指令
- * @return false | integer
- */
- public function execute($sql='') {
- if(!empty($sql)) {
- if(strpos($sql,'__TABLE__'))
- $sql = str_replace('__TABLE__',$this->getTableName(),$sql);
- return $this->db->execute($sql);
- }else {
- return false;
- }
- }
- /**
- * 得到当前的数据对象名称
- * @access public
- * @return string
- */
- public function getModelName() {
- if(empty($this->name)) {
- $this->name = substr(get_class($this),0,-5);
- }
- return $this->name;
- }
- /**
- * 得到完整的数据表名
- * @access public
- * @return string
- */
- public function getTableName() {
- if(empty($this->trueTableName)) {
- $tableName = !empty($this->tablePrefix) ? $this->tablePrefix : '';
- if(!empty($this->tableName)) {
- $tableName .= $this->tableName;
- }else{
- $tableName .= parse_name($this->name);
- }
- if(!empty($this->dbName)) {
- $tableName = $this->dbName.'.'.$tableName;
- }
- $this->trueTableName = strtolower($tableName);
- }
- return $this->trueTableName;
- }
- /**
- * 启动事务
- * @access public
- * @return void
- */
- public function startTrans() {
- $this->commit();
- $this->db->startTrans();
- return ;
- }
- /**
- * 提交事务
- * @access public
- * @return boolean
- */
- public function commit() {
- return $this->db->commit();
- }
- /**
- * 事务回滚
- * @access public
- * @return boolean
- */
- public function rollback() {
- return $this->db->rollback();
- }
- /**
- * 获取主键名称
- * @access public
- * @return string
- */
- public function getPk() {
- return isset($this->fields['_pk'])?$this->fields['_pk']:$this->pk;
- }
- /**
- * 返回最后执行的sql语句
- * @access public
- * @return string
- */
- public function getLastSql() {
- return $this->db->getLastSql();
- }
- /**
- * 返回最后插入的ID
- * @access public
- * @return string
- */
- public function getLastInsID() {
- return $this->db->getLastInsID();
- }
- }
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