www.gusucode.com > WSTMall PHP网店系统 v1.6.0PHP源码程序 > WSTMall PHP网店系统 v1.6.0/wstmall_v1.6.0_160506/wstmall_v1.6.0_160506/ThinkPHP/Library/Think/Model/ViewModel.class.php
<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace Think\Model;
use Think\Model;
/**
* ThinkPHP视图模型扩展
*/
class ViewModel extends Model {
protected $viewFields = array();
/**
* 自动检测数据表信息
* @access protected
* @return void
*/
protected function _checkTableInfo() {}
/**
* 得到完整的数据表名
* @access public
* @return string
*/
public function getTableName() {
if(empty($this->trueTableName)) {
$tableName = '';
foreach ($this->viewFields as $key=>$view){
// 获取数据表名称
if(isset($view['_table'])) { // 2011/10/17 添加实际表名定义支持 可以实现同一个表的视图
$tableName .= $view['_table'];
$prefix = $this->tablePrefix;
$tableName = preg_replace_callback("/__([A-Z_-]+)__/sU", function($match) use($prefix){ return $prefix.strtolower($match[1]);}, $tableName);
}else{
$class = $key.'Model';
$Model = class_exists($class)?new $class():M($key);
$tableName .= $Model->getTableName();
}
// 表别名定义
$tableName .= !empty($view['_as'])?' '.$view['_as']:' '.$key;
// 支持ON 条件定义
$tableName .= !empty($view['_on'])?' ON '.$view['_on']:'';
// 指定JOIN类型 例如 RIGHT INNER LEFT 下一个表有效
$type = !empty($view['_type'])?$view['_type']:'';
$tableName .= ' '.strtoupper($type).' JOIN ';
$len = strlen($type.'_JOIN ');
}
$tableName = substr($tableName,0,-$len);
$this->trueTableName = $tableName;
}
return $this->trueTableName;
}
/**
* 表达式过滤方法
* @access protected
* @param string $options 表达式
* @return void
*/
protected function _options_filter(&$options) {
if(isset($options['field']))
$options['field'] = $this->checkFields($options['field']);
else
$options['field'] = $this->checkFields();
if(isset($options['group']))
$options['group'] = $this->checkGroup($options['group']);
if(isset($options['where']))
$options['where'] = $this->checkCondition($options['where']);
if(isset($options['order']))
$options['order'] = $this->checkOrder($options['order']);
}
/**
* 检查是否定义了所有字段
* @access protected
* @param string $name 模型名称
* @param array $fields 字段数组
* @return array
*/
private function _checkFields($name,$fields) {
if(false !== $pos = array_search('*',$fields)) {// 定义所有字段
$fields = array_merge($fields,M($name)->getDbFields());
unset($fields[$pos]);
}
return $fields;
}
/**
* 检查条件中的视图字段
* @access protected
* @param mixed $data 条件表达式
* @return array
*/
protected function checkCondition($where) {
if(is_array($where)) {
$view = array();
// 检查视图字段
foreach ($this->viewFields as $key=>$val){
$k = isset($val['_as'])?$val['_as']:$key;
$val = $this->_checkFields($key,$val);
foreach ($where as $name=>$value){
if(false !== $field = array_search($name,$val,true)) {
// 存在视图字段
$_key = is_numeric($field)? $k.'.'.$name : $k.'.'.$field;
$view[$_key] = $value;
unset($where[$name]);
}
}
}
$where = array_merge($where,$view);
}
return $where;
}
/**
* 检查Order表达式中的视图字段
* @access protected
* @param string $order 字段
* @return string
*/
protected function checkOrder($order='') {
if(is_string($order) && !empty($order)) {
$orders = explode(',',$order);
$_order = array();
foreach ($orders as $order){
$array = explode(' ',trim($order));
$field = $array[0];
$sort = isset($array[1])?$array[1]:'ASC';
// 解析成视图字段
foreach ($this->viewFields as $name=>$val){
$k = isset($val['_as'])?$val['_as']:$name;
$val = $this->_checkFields($name,$val);
if(false !== $_field = array_search($field,$val,true)) {
// 存在视图字段
$field = is_numeric($_field)?$k.'.'.$field:$k.'.'.$_field;
break;
}
}
$_order[] = $field.' '.$sort;
}
$order = implode(',',$_order);
}
return $order;
}
/**
* 检查Group表达式中的视图字段
* @access protected
* @param string $group 字段
* @return string
*/
protected function checkGroup($group='') {
if(!empty($group)) {
$groups = explode(',',$group);
$_group = array();
foreach ($groups as $field){
// 解析成视图字段
foreach ($this->viewFields as $name=>$val){
$k = isset($val['_as'])?$val['_as']:$name;
$val = $this->_checkFields($name,$val);
if(false !== $_field = array_search($field,$val,true)) {
// 存在视图字段
$field = is_numeric($_field)?$k.'.'.$field:$k.'.'.$_field;
break;
}
}
$_group[] = $field;
}
$group = implode(',',$_group);
}
return $group;
}
/**
* 检查fields表达式中的视图字段
* @access protected
* @param string $fields 字段
* @return string
*/
protected function checkFields($fields='') {
if(empty($fields) || '*'==$fields ) {
// 获取全部视图字段
$fields = array();
foreach ($this->viewFields as $name=>$val){
$k = isset($val['_as'])?$val['_as']:$name;
$val = $this->_checkFields($name,$val);
foreach ($val as $key=>$field){
if(is_numeric($key)) {
$fields[] = $k.'.'.$field.' AS '.$field;
}elseif('_' != substr($key,0,1)) {
// 以_开头的为特殊定义
if( false !== strpos($key,'*') || false !== strpos($key,'(') || false !== strpos($key,'.')) {
//如果包含* 或者 使用了sql方法 则不再添加前面的表名
$fields[] = $key.' AS '.$field;
}else{
$fields[] = $k.'.'.$key.' AS '.$field;
}
}
}
}
$fields = implode(',',$fields);
}else{
if(!is_array($fields))
$fields = explode(',',$fields);
// 解析成视图字段
$array = array();
foreach ($fields as $key=>$field){
if(strpos($field,'(') || strpos(strtolower($field),' as ')){
// 使用了函数或者别名
$array[] = $field;
unset($fields[$key]);
}
}
foreach ($this->viewFields as $name=>$val){
$k = isset($val['_as'])?$val['_as']:$name;
$val = $this->_checkFields($name,$val);
foreach ($fields as $key=>$field){
if(false !== $_field = array_search($field,$val,true)) {
// 存在视图字段
if(is_numeric($_field)) {
$array[] = $k.'.'.$field.' AS '.$field;
}elseif('_' != substr($_field,0,1)){
if( false !== strpos($_field,'*') || false !== strpos($_field,'(') || false !== strpos($_field,'.'))
//如果包含* 或者 使用了sql方法 则不再添加前面的表名
$array[] = $_field.' AS '.$field;
else
$array[] = $k.'.'.$_field.' AS '.$field;
}
}
}
}
$fields = implode(',',$array);
}
return $fields;
}
}