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