www.gusucode.com > tpframe PHP开发框架 v2.2PHP源码程序 > tpframe PHP开发框架 v2.2/tpframe_v2.2.0618/tpframe_v2.2.0618/coreframe/thinkphp/library/think/model/relation/MorphOne.php
<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace think\model\relation;
use think\db\Query;
use think\Exception;
use think\Loader;
use think\Model;
use think\model\Relation;
class MorphOne extends Relation
{
// 多态字段
protected $morphKey;
protected $morphType;
// 多态类型
protected $type;
/**
* 构造函数
* @access public
* @param Model $parent 上级模型对象
* @param string $model 模型名
* @param string $morphKey 关联外键
* @param string $morphType 多态字段名
* @param string $type 多态类型
*/
public function __construct(Model $parent, $model, $morphKey, $morphType, $type)
{
$this->parent = $parent;
$this->model = $model;
$this->type = $type;
$this->morphKey = $morphKey;
$this->morphType = $morphType;
$this->query = (new $model)->db();
}
/**
* 延迟获取关联数据
* @param string $subRelation 子关联名
* @param \Closure $closure 闭包查询条件
* @return false|\PDOStatement|string|\think\Collection
*/
public function getRelation($subRelation = '', $closure = null)
{
if ($closure) {
call_user_func_array($closure, [ & $this->query]);
}
$relationModel = $this->relation($subRelation)->find();
if ($relationModel) {
$relationModel->setParent(clone $this->parent);
}
return $relationModel;
}
/**
* 根据关联条件查询当前模型
* @access public
* @param string $operator 比较操作符
* @param integer $count 个数
* @param string $id 关联表的统计字段
* @param string $joinType JOIN类型
* @return Query
*/
public function has($operator = '>=', $count = 1, $id = '*', $joinType = 'INNER')
{
return $this->parent;
}
/**
* 根据关联条件查询当前模型
* @access public
* @param mixed $where 查询条件（数组或者闭包）
* @param mixed $fields 字段
* @return Query
*/
public function hasWhere($where = [], $fields = null)
{
throw new Exception('relation not support: hasWhere');
}
/**
* 预载入关联查询
* @access public
* @param array $resultSet 数据集
* @param string $relation 当前关联名
* @param string $subRelation 子关联名
* @param \Closure $closure 闭包
* @return void
*/
public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure)
{
$morphType = $this->morphType;
$morphKey = $this->morphKey;
$type = $this->type;
$range = [];
foreach ($resultSet as $result) {
$pk = $result->getPk();
// 获取关联外键列表
if (isset($result->$pk)) {
$range[] = $result->$pk;
}
}
if (!empty($range)) {
$data = $this->eagerlyMorphToOne([
$morphKey => ['in', $range],
$morphType => $type,
], $relation, $subRelation, $closure);
// 关联属性名
$attr = Loader::parseName($relation);
// 关联数据封装
foreach ($resultSet as $result) {
if (!isset($data[$result->$pk])) {
$relationModel = null;
} else {
$relationModel = $data[$result->$pk];
$relationModel->setParent(clone $result);
$relationModel->isUpdate(true);
}
$result->setRelation($attr, $relationModel);
}
}
}
/**
* 预载入关联查询
* @access public
* @param Model $result 数据对象
* @param string $relation 当前关联名
* @param string $subRelation 子关联名
* @param \Closure $closure 闭包
* @return void
*/
public function eagerlyResult(&$result, $relation, $subRelation, $closure)
{
$pk = $result->getPk();
if (isset($result->$pk)) {
$pk = $result->$pk;
$data = $this->eagerlyMorphToOne([
$this->morphKey => $pk,
$this->morphType => $this->type,
], $relation, $subRelation, $closure);
if (isset($data[$pk])) {
$relationModel = $data[$pk];
$relationModel->setParent(clone $result);
$relationModel->isUpdate(true);
} else {
$relationModel = null;
}
$result->setRelation(Loader::parseName($relation), $relationModel);
}
}
/**
* 多态一对一 关联模型预查询
* @access public
* @param array $where 关联预查询条件
* @param string $relation 关联名
* @param string $subRelation 子关联
* @param bool|\Closure $closure 闭包
* @return array
*/
protected function eagerlyMorphToOne($where, $relation, $subRelation = '', $closure = false)
{
// 预载入关联查询 支持嵌套预载入
if ($closure) {
call_user_func_array($closure, [ & $this]);
}
$list = $this->query->where($where)->with($subRelation)->find();
$morphKey = $this->morphKey;
// 组装模型数据
$data = [];
foreach ($list as $set) {
$data[$set->$morphKey][] = $set;
}
return $data;
}
/**
* 保存（新增）当前关联数据对象
* @access public
* @param mixed $data 数据 可以使用数组 关联模型对象 和 关联对象的主键
* @return Model|false
*/
public function save($data)
{
if ($data instanceof Model) {
$data = $data->getData();
}
// 保存关联表数据
$pk = $this->parent->getPk();
$model = new $this->model;
$data[$this->morphKey] = $this->parent->$pk;
$data[$this->morphType] = $this->type;
return $model->save($data) ? $model : false;
}
/**
* 执行基础查询（进执行一次）
* @access protected
* @return void
*/
protected function baseQuery()
{
if (empty($this->baseQuery) && $this->parent->getData()) {
$pk = $this->parent->getPk();
$map[$this->morphKey] = $this->parent->$pk;
$map[$this->morphType] = $this->type;
$this->query->where($map);
$this->baseQuery = true;
}
}
}