<?php<liu21st@gmail.com>namespace Think\Model;
use Think\Model;
class RelationModel extends Model {
const HAS_ONE = 1;
const BELONGS_TO = 2;
const HAS_MANY = 3;
const MANY_TO_MANY= 4;
protected $_link = array();
public function __call($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,$args);
}
}
public function getRelationTableName($relation) {
$relationTable = !empty($this->tablePrefix) ? $this->tablePrefix : '';
$relationTable .= $this->tableName?$this->tableName:$this->name;
$relationTable .= '_'.$relation->getModelName();
return strtolower($relationTable);
}
protected function _after_find(&$result,$options) {
if(!empty($options['link']))
$this->getRelation($result,$options['link']);
}
protected function _after_select(&$result,$options) {
if(!empty($options['link']))
$this->getRelations($result,$options['link']);
}
protected function _after_insert($data,$options) {
if(!empty($options['link']))
$this->opRelation('ADD',$data,$options['link']);
}
protected function _after_update($data,$options) {
if(!empty($options['link']))
$this->opRelation('SAVE',$data,$options['link']);
}
protected function _after_delete($data,$options) {
if(!empty($options['link']))
$this->opRelation('DEL',$data,$options['link']);
}
protected function _facade($data) {
$this->_before_write($data);
return $data;
}
protected function getRelations(&$resultSet,$name='') {
foreach($resultSet as $key=>$val) {
$val = $this->getRelation($val,$name);
$resultSet[$key] = $val;
}
return $resultSet;
}
protected function getRelation(&$result,$name='',$return=false) {
if(!empty($this->_link)) {
foreach($this->_link as $key=>$val) {
$mappingName = !empty($val['mapping_name'])?$val['mapping_name']:$key; if(empty($name) || true === $name || $mappingName == $name || (is_array($name) && in_array($mappingName,$name))) {
$mappingType = !empty($val['mapping_type'])?$val['mapping_type']:$val; $mappingClass = !empty($val['class_name'])?$val['class_name']:$key; $mappingFields = !empty($val['mapping_fields'])?$val['mapping_fields']:'*'; $mappingCondition = !empty($val['condition'])?$val['condition']:'1=1'; $mappingKey =!empty($val['mapping_key'])? $val['mapping_key'] : $this->getPk(); if(strtoupper($mappingClass)==strtoupper($this->name)) {
$mappingFk = !empty($val['parent_key'])? $val['parent_key'] : 'parent_id';
}else{
$mappingFk = !empty($val['foreign_key'])?$val['foreign_key']:strtolower($this->name).'_id'; }
$model = D($mappingClass);
switch($mappingType) {
case self::HAS_ONE:
$pk = $result[$mappingKey];
$mappingCondition .= " AND {$mappingFk}='{$pk}'";
$relationData = $model->where($mappingCondition)->field($mappingFields)->find();
if (!empty($val['relation_deep'])){
$model->getRelation($relationData,$val['relation_deep']);
}
break;
case self::BELONGS_TO:
if(strtoupper($mappingClass)==strtoupper($this->name)) {
$mappingFk = !empty($val['parent_key'])? $val['parent_key'] : 'parent_id';
}else{
$mappingFk = !empty($val['foreign_key'])?$val['foreign_key']:strtolower($model->getModelName()).'_id'; }
$fk = $result[$mappingFk];
$mappingCondition .= " AND {$model->getPk()}='{$fk}'";
$relationData = $model->where($mappingCondition)->field($mappingFields)->find();
if (!empty($val['relation_deep'])){
$model->getRelation($relationData,$val['relation_deep']);
}
break;
case self::HAS_MANY:
$pk = $result[$mappingKey];
$mappingCondition .= " AND {$mappingFk}='{$pk}'";
$mappingOrder = !empty($val['mapping_order'])?$val['mapping_order']:'';
$mappingLimit = !empty($val['mapping_limit'])?$val['mapping_limit']:'';
$relationData = $model->where($mappingCondition)->field($mappingFields)->order($mappingOrder)->limit($mappingLimit)->select();
if (!empty($val['relation_deep'])){
foreach($relationData as $key=>$data){
$model->getRelation($data,$val['relation_deep']);
$relationData[$key] = $data;
}
}
break;
case self::MANY_TO_MANY:
$pk = $result[$mappingKey];
$prefix = $this->tablePrefix;
$mappingCondition = " {$mappingFk}='{$pk}'";
$mappingOrder = $val['mapping_order'];
$mappingLimit = $val['mapping_limit'];
$mappingRelationFk = $val['relation_foreign_key']?$val['relation_foreign_key']:$model->getModelName().'_id';
if(isset($val['relation_table'])){
$mappingRelationTable = preg_replace_callback("/__([A-Z_-]+)__/sU", function($match) use($prefix){ return $prefix.strtolower($match[1]);}, $val['relation_table']);
}else{
$mappingRelationTable = $this->getRelationTableName($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);
if (!empty($val['relation_deep'])){
foreach($relationData as $key=>$data){
$model->getRelation($data,$val['relation_deep']);
$relationData[$key] = $data;
}
}
break;
}
if(!$return){
if(isset($val['as_fields']) && in_array($mappingType,array(self::HAS_ONE,self::BELONGS_TO)) ) {
$fields = explode(',',$val['as_fields']);
foreach ($fields as $field){
if(strpos($field,':')) {
list($relationName,$nick) = explode(':',$field);
$result[$nick] = $relationData[$relationName];
}else{
$result[$field] = $relationData[$field];
}
}
}else{
$result[$mappingName] = $relationData;
}
unset($relationData);
}else{
return $relationData;
}
}
}
}
return $result;
}
protected function opRelation($opType,$data='',$name='') {
$result = false;
if(empty($data) && !empty($this->data)){
$data = $this->data;
}elseif(!is_array($data)){
return false;
}
if(!empty($this->_link)) {
foreach($this->_link as $key=>$val) {
$mappingName = $val['mapping_name']?$val['mapping_name']:$key; if(empty($name) || true === $name || $mappingName == $name || (is_array($name) && in_array($mappingName,$name)) ) {
$mappingType = !empty($val['mapping_type'])?$val['mapping_type']:$val; $mappingClass = !empty($val['class_name'])?$val['class_name']:$key; $mappingKey =!empty($val['mapping_key'])? $val['mapping_key'] : $this->getPk(); $pk = $data[$mappingKey];
if(strtoupper($mappingClass)==strtoupper($this->name)) {
$mappingFk = !empty($val['parent_key'])? $val['parent_key'] : 'parent_id';
}else{
$mappingFk = !empty($val['foreign_key'])?$val['foreign_key']:strtolower($this->name).'_id'; }
if(!empty($val['condition'])) {
$mappingCondition = $val['condition'];
}else{
$mappingCondition = array();
$mappingCondition[$mappingFk] = $pk;
}
$model = D($mappingClass);
$mappingData = isset($data[$mappingName])?$data[$mappingName]:false;
if(!empty($mappingData) || $opType == 'DEL') {
switch($mappingType) {
case self::HAS_ONE:
switch (strtoupper($opType)){
case 'ADD': $mappingData[$mappingFk] = $pk;
$result = $model->add($mappingData);
break;
case 'SAVE': $result = $model->where($mappingCondition)->save($mappingData);
break;
case 'DEL': $result = $model->where($mappingCondition)->delete();
break;
}
break;
case self::BELONGS_TO:
break;
case self::HAS_MANY:
switch (strtoupper($opType)){
case 'ADD' : $model->startTrans();
foreach ($mappingData as $val){
$val[$mappingFk] = $pk;
$result = $model->add($val);
}
$model->commit();
break;
case 'SAVE' : $model->startTrans();
$pk = $model->getPk();
foreach ($mappingData as $vo){
if(isset($vo[$pk])) $mappingCondition = "$pk ={$vo[$pk]}";
$result = $model->where($mappingCondition)->save($vo);
}else{ $vo[$mappingFk] = $data[$mappingKey];
$result = $model->add($vo);
}
}
$model->commit();
break;
case 'DEL' : $result = $model->where($mappingCondition)->delete();
break;
}
break;
case self::MANY_TO_MANY:
$mappingRelationFk = $val['relation_foreign_key']?$val['relation_foreign_key']:$model->getModelName().'_id' $prefix = $this->tablePrefix;
if(isset($val['relation_table'])){
$mappingRelationTable = preg_replace_callback("/__([A-Z_-]+)__/sU", function($match) use($prefix){ return $prefix.strtolower($match[1]);}, $val['relation_table']);
}else{
$mappingRelationTable = $this->getRelationTableName($model);
}
if(is_array($mappingData)) {
$ids = array();
foreach ($mappingData as $vo)
$ids[] = $vo[$mappingKey];
$relationId = implode(',',$ids);
}
switch (strtoupper($opType)){
case 'ADD': if(isset($relationId)) {
$this->startTrans();
$sql = 'INSERT INTO '.$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)
$this->commit();
else
$this->rollback();
}
break;
case 'SAVE': if(isset($relationId)) {
$this->startTrans();
$this->table($mappingRelationTable)->where($mappingCondition)->delete();
$sql = 'INSERT INTO '.$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)
$this->commit();
else
$this->rollback();
}
break;
case 'DEL': $result = $this->table($mappingRelationTable)->where($mappingCondition)->delete();
break;
}
break;
}
if (!empty($val['relation_deep'])){
$model->opRelation($opType,$mappingData,$val['relation_deep']);
}
}
}
}
}
return $result;
}
public function relation($name) {
$this->options['link'] = $name;
return $this;
}
public function relationGet($name) {
if(empty($this->data))
return false;
return $this->getRelation($this->data,$name,true);
}
}
