www.gusucode.com > Isoft PHP仓储管理系统(think仓储管理系统) v1.2.1源码程序 > isoftwms_v1.2.1/source/ThinkPHP/Lib/Think/Core/Model/RelationModel.class.php
<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: RelationModel.class.php 2701 2012-02-02 12:27:51Z liu21st $
/**
+------------------------------------------------------------------------------
* ThinkPHP 关联模型类
+------------------------------------------------------------------------------
* @category Think
* @package Think
* @subpackage Core
* @author liu21st <liu21st@gmail.com>
* @version $Id: RelationModel.class.php 2701 2012-02-02 12:27:51Z liu21st $
+------------------------------------------------------------------------------
*/
class RelationModel extends Model {
// 关联定义
protected $_link = array();
/**
+----------------------------------------------------------
* 动态方法实现
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $method 方法名称
* @param array $args 调用参数
+----------------------------------------------------------
* @return mixed
+----------------------------------------------------------
*/
public function __call($method,$args) {
if(strtolower(substr($method,0,8))=='relation'){
$type = strtoupper(substr($method,8));
if(in_array($type,array('ADD','SAVE','DEL'),true)) {
array_unshift($args,$type);
return call_user_func_array(array(&$this, 'opRelation'), $args);
}
}else{
return parent::__call($method,$args);
}
}
/**
+----------------------------------------------------------
* 得到关联的数据表名
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return string
+----------------------------------------------------------
*/
public function getRelationTableName($relation) {
$relationTable = !empty($this->tablePrefix) ? $this->tablePrefix : '';
$relationTable .= $this->tableName?$this->tableName:$this->name;
$relationTable .= '_'.$relation->getModelName();
return strtolower($relationTable);
}
// 查询成功后的回调方法
protected function _after_find(&$result,$options) {
// 获取关联数据 并附加到结果中
if(!empty($options['link']))
$this->getRelation($result,$options['link']);
}
// 查询数据集成功后的回调方法
protected function _after_select(&$result,$options) {
// 获取关联数据 并附加到结果中
if(!empty($options['link']))
$this->getRelations($result,$options['link']);
}
// 写入成功后的回调方法
protected function _after_insert($data,$options) {
// 关联写入
if(!empty($options['link']))
$this->opRelation('ADD',$data,$options['link']);
}
// 更新成功后的回调方法
protected function _after_update($data,$options) {
// 关联更新
if(!empty($options['link']))
$this->opRelation('SAVE',$data,$options['link']);
}
// 删除成功后的回调方法
protected function _after_delete($data,$options) {
// 关联删除
if(!empty($options['link']))
$this->opRelation('DEL',$data,$options['link']);
}
/**
+----------------------------------------------------------
* 对保存到数据库的数据进行处理
+----------------------------------------------------------
* @access protected
+----------------------------------------------------------
* @param mixed $data 要操作的数据
+----------------------------------------------------------
* @return boolean
+----------------------------------------------------------
*/
protected function _facade($data) {
$this->_before_write($data);
return $data;
}
/**
+----------------------------------------------------------
* 获取返回数据集的关联记录
+----------------------------------------------------------
* @access protected
+----------------------------------------------------------
* @param array $resultSet 返回数据
* @param string|array $name 关联名称
+----------------------------------------------------------
* @return array
+----------------------------------------------------------
*/
protected function getRelations(&$resultSet,$name='') {
// 获取记录集的主键列表
foreach($resultSet as $key=>$val) {
$val = $this->getRelation($val,$name);
$resultSet[$key] = $val;
}
return $resultSet;
}
/**
+----------------------------------------------------------
* 获取返回数据的关联记录
+----------------------------------------------------------
* @access protected
+----------------------------------------------------------
* @param mixed $result 返回数据
* @param string|array $name 关联名称
* @param boolean $return 是否返回关联数据本身
+----------------------------------------------------------
* @return array
+----------------------------------------------------------
*/
protected function getRelation(&$result,$name='',$return=false) {
if(!empty($this->_link)) {
foreach($this->_link as $key=>$val) {
$mappingName = !empty($val['mapping_name'])?$val['mapping_name']:$key; // 映射名称
if(empty($name) || true === $name || $mappingName == $name || (is_array($name) && in_array($mappingName,$name))) {
$mappingType = !empty($val['mapping_type'])?$val['mapping_type']:$val; // 关联类型
$mappingClass = !empty($val['class_name'])?$val['class_name']:$key; // 关联类名
$mappingFields = !empty($val['mapping_fields'])?$val['mapping_fields']:'*'; // 映射字段
$mappingCondition = !empty($val['condition'])?$val['condition']:'1=1'; // 关联条件
if(strtoupper($mappingClass)==strtoupper($this->name)) {
// 自引用关联 获取父键名
$mappingFk = !empty($val['parent_key'])? $val['parent_key'] : 'parent_id';
}else{
$mappingFk = !empty($val['foreign_key'])?$val['foreign_key']:strtolower($this->name).'_id'; // 关联外键
}
// 获取关联模型对象
$model = D($mappingClass);
switch($mappingType) {
case HAS_ONE:
$pk = $result[$this->getPk()];
$mappingCondition .= " AND {$mappingFk}='{$pk}'";
$relationData = $model->where($mappingCondition)->field($mappingFields)->find();
break;
case BELONGS_TO:
if(strtoupper($mappingClass)==strtoupper($this->name)) {
// 自引用关联 获取父键名
$mappingFk = !empty($val['parent_key'])? $val['parent_key'] : 'parent_id';
}else{
$mappingFk = !empty($val['foreign_key'])?$val['foreign_key']:strtolower($model->getModelName()).'_id'; // 关联外键
}
$fk = $result[$mappingFk];
$mappingCondition .= " AND {$model->getPk()}='{$fk}'";
$relationData = $model->where($mappingCondition)->field($mappingFields)->find();
break;
case HAS_MANY:
$pk = $result[$this->getPk()];
$mappingCondition .= " AND {$mappingFk}='{$pk}'";
$mappingOrder = !empty($val['mapping_order'])?$val['mapping_order']:'';
$mappingLimit = !empty($val['mapping_limit'])?$val['mapping_limit']:'';
// 延时获取关联记录
$relationData = $model->where($mappingCondition)->field($mappingFields)->order($mappingOrder)->limit($mappingLimit)->select();
break;
case MANY_TO_MANY:
$pk = $result[$this->getPk()];
$mappingCondition = " {$mappingFk}='{$pk}'";
$mappingOrder = $val['mapping_order'];
$mappingLimit = $val['mapping_limit'];
$mappingRelationFk = $val['relation_foreign_key']?$val['relation_foreign_key']:$model->getModelName().'_id';
$mappingRelationTable = $val['relation_table']?$val['relation_table']:$this->getRelationTableName($model);
$sql = "SELECT b.{$mappingFields} FROM {$mappingRelationTable} AS a, ".$model->getTableName()." AS b WHERE a.{$mappingRelationFk} = b.{$model->getPk()} AND a.{$mappingCondition}";
if(!empty($val['condition'])) {
$sql .= ' AND '.$val['condition'];
}
if(!empty($mappingOrder)) {
$sql .= ' ORDER BY '.$mappingOrder;
}
if(!empty($mappingLimit)) {
$sql .= ' LIMIT '.$mappingLimit;
}
$relationData = $this->query($sql);
break;
}
if(!$return){
if(isset($val['as_fields']) && in_array($mappingType,array(HAS_ONE,BELONGS_TO)) ) {
// 支持直接把关联的字段值映射成数据对象中的某个字段
// 仅仅支持HAS_ONE BELONGS_TO
$fields = explode(',',$val['as_fields']);
foreach ($fields as $field){
if(strpos($field,':')) {
list($name,$nick) = explode(':',$field);
$result[$nick] = $relationData[$name];
}else{
$result[$field] = $relationData[$field];
}
}
}else{
$result[$mappingName] = $relationData;
}
unset($relationData);
}else{
return $relationData;
}
}
}
}
return $result;
}
/**
+----------------------------------------------------------
* 操作关联数据
+----------------------------------------------------------
* @access protected
+----------------------------------------------------------
* @param string $opType 操作方式 ADD SAVE DEL
* @param mixed $data 数据对象
* @param string $name 关联名称
+----------------------------------------------------------
* @return mixed
+----------------------------------------------------------
*/
protected function opRelation($opType,$data='',$name='') {
$result = false;
if(empty($data) && !empty($this->data)){
$data = $this->data;
}elseif(!is_array($data)){
// 数据无效返回
return false;
}
if(!empty($this->_link)) {
// 遍历关联定义
foreach($this->_link as $key=>$val) {
// 操作制定关联类型
$mappingName = $val['mapping_name']?$val['mapping_name']:$key; // 映射名称
if(empty($name) || true === $name || $mappingName == $name || (is_array($name) && in_array($mappingName,$name)) ) {
// 操作制定的关联
$mappingType = !empty($val['mapping_type'])?$val['mapping_type']:$val; // 关联类型
$mappingClass = !empty($val['class_name'])?$val['class_name']:$key; // 关联类名
// 当前数据对象主键值
$pk = $data[$this->getPk()];
if(strtoupper($mappingClass)==strtoupper($this->name)) {
// 自引用关联 获取父键名
$mappingFk = !empty($val['parent_key'])? $val['parent_key'] : 'parent_id';
}else{
$mappingFk = !empty($val['foreign_key'])?$val['foreign_key']:strtolower($this->name).'_id'; // 关联外键
}
$mappingCondition = !empty($val['condition'])? $val['condition'] : "{$mappingFk}='{$pk}'";
// 获取关联model对象
$model = D($mappingClass);
$mappingData = isset($data[$mappingName])?$data[$mappingName]:false;
if(!empty($mappingData) || $opType == 'DEL') {
switch($mappingType) {
case HAS_ONE:
switch (strtoupper($opType)){
case 'ADD': // 增加关联数据
$mappingData[$mappingFk] = $pk;
$result = $model->add($mappingData);
break;
case 'SAVE': // 更新关联数据
$result = $model->where($mappingCondition)->save($mappingData);
break;
case 'DEL': // 根据外键删除关联数据
$result = $model->where($mappingCondition)->delete();
break;
}
break;
case BELONGS_TO:
break;
case HAS_MANY:
switch (strtoupper($opType)){
case 'ADD' : // 增加关联数据
$model->startTrans();
foreach ($mappingData as $val){
$val[$mappingFk] = $pk;
$result = $model->add($val);
}
$model->commit();
break;
case 'SAVE' : // 更新关联数据
$model->startTrans();
$pk = $model->getPk();
foreach ($mappingData as $vo){
if(isset($vo[$pk])) {// 更新数据
$mappingCondition = "$pk ={$vo[$pk]}";
$result = $model->where($mappingCondition)->save($vo);
}else{ // 新增数据
$vo[$mappingFk] = $data[$this->getPk()];
$result = $model->add($vo);
}
}
$model->commit();
break;
case 'DEL' : // 删除关联数据
$result = $model->where($mappingCondition)->delete();
break;
}
break;
case MANY_TO_MANY:
$mappingRelationFk = $val['relation_foreign_key']?$val['relation_foreign_key']:$model->getModelName().'_id';// 关联
$mappingRelationTable = $val['relation_table']?$val['relation_table']:$this->getRelationTableName($model);
if(is_array($mappingData)) {
$ids = array();
foreach ($mappingData as $vo)
$ids[] = $vo[$model->getPk()];
$relationId = implode(',',$ids);
}
switch (strtoupper($opType)){
case 'ADD': // 增加关联数据
case 'SAVE': // 更新关联数据
if(isset($relationId)) {
$this->startTrans();
// 删除关联表数据
$this->table($mappingRelationTable)->where($mappingCondition)->delete();
// 插入关联表数据
$sql = 'INSERT INTO '.$mappingRelationTable.' ('.$mappingFk.','.$mappingRelationFk.') SELECT a.'.$this->getPk().',b.'.$model->getPk().' FROM '.$this->getTableName().' AS a ,'.$model->getTableName()." AS b where a.".$this->getPk().' ='. $pk.' AND b.'.$model->getPk().' IN ('.$relationId.") ";
$result = $model->execute($sql);
if(false !== $result)
// 提交事务
$this->commit();
else
// 事务回滚
$this->rollback();
}
break;
case 'DEL': // 根据外键删除中间表关联数据
$result = $this->table($mappingRelationTable)->where($mappingCondition)->delete();
break;
}
break;
}
}
}
}
}
return $result;
}
/**
+----------------------------------------------------------
* 进行关联查询
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param mixed $name 关联名称
+----------------------------------------------------------
* @return Model
+----------------------------------------------------------
*/
public function relation($name) {
$this->options['link'] = $name;
return $this;
}
/**
+----------------------------------------------------------
* 关联数据获取 仅用于查询后
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $name 关联名称
+----------------------------------------------------------
* @return array
+----------------------------------------------------------
*/
public function relationGet($name) {
if(empty($this->data))
return false;
return $this->getRelation($this->data,$name,true);
}
}
?>