mirror of
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133 lines
4.5 KiB
PHP
133 lines
4.5 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2017 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\relation;
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use think\Loader;
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use think\Model;
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class BelongsTo extends OneToOne
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{
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/**
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* 架构函数
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* @access public
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* @param Model $parent 上级模型对象
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* @param string $model 模型名
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* @param string $foreignKey 关联外键
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* @param string $localKey 关联主键
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* @param string $joinType JOIN类型
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*/
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public function __construct(Model $parent, $model, $foreignKey, $localKey, $joinType = 'INNER')
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{
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$this->parent = $parent;
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$this->model = $model;
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$this->foreignKey = $foreignKey;
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$this->localKey = $localKey;
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$this->joinType = $joinType;
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$this->query = (new $model)->db();
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}
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/**
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* 延迟获取关联数据
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* @param string $subRelation 子关联名
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* @param \Closure $closure 闭包查询条件
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* @access public
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* @return array|false|\PDOStatement|string|Model
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*/
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public function getRelation($subRelation = '', $closure = null)
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{
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$foreignKey = $this->foreignKey;
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if ($closure) {
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call_user_func_array($closure, [ & $this->query]);
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}
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return $this->query->where($this->localKey, $this->parent->$foreignKey)->relation($subRelation)->find();
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}
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/**
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* 预载入关联查询(数据集)
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* @access public
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* @param array $resultSet 数据集
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* @param string $relation 当前关联名
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* @param string $subRelation 子关联名
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* @param \Closure $closure 闭包
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* @return void
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*/
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protected function eagerlySet(&$resultSet, $relation, $subRelation, $closure)
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{
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$localKey = $this->localKey;
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$foreignKey = $this->foreignKey;
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$range = [];
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foreach ($resultSet as $result) {
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// 获取关联外键列表
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if (isset($result->$foreignKey)) {
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$range[] = $result->$foreignKey;
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}
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}
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if (!empty($range)) {
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$data = $this->eagerlyWhere($this, [
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$localKey => [
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'in',
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$range,
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],
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], $localKey, $relation, $subRelation, $closure);
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// 关联属性名
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$attr = Loader::parseName($relation);
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// 关联数据封装
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foreach ($resultSet as $result) {
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// 关联模型
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if (!isset($data[$result->$localKey])) {
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$relationModel = null;
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} else {
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$relationModel = $data[$result->$localKey];
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}
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if ($relationModel && !empty($this->bindAttr)) {
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// 绑定关联属性
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$this->bindAttr($relationModel, $result, $this->bindAttr);
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}
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// 设置关联属性
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$result->setAttr($attr, $relationModel);
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}
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}
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}
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/**
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* 预载入关联查询(数据)
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* @access public
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* @param Model $result 数据对象
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* @param string $relation 当前关联名
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* @param string $subRelation 子关联名
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* @param \Closure $closure 闭包
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* @return void
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*/
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protected function eagerlyOne(&$result, $relation, $subRelation, $closure)
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{
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$localKey = $this->localKey;
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$foreignKey = $this->foreignKey;
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$data = $this->eagerlyWhere($this, [$localKey => $result->$foreignKey], $localKey, $relation, $subRelation, $closure);
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// 关联模型
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if (!isset($data[$result->$localKey])) {
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$relationModel = null;
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} else {
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$relationModel = $data[$result->$localKey];
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}
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if ($relationModel && !empty($this->bindAttr)) {
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// 绑定关联属性
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$this->bindAttr($relationModel, $result, $this->bindAttr);
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}
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// 设置关联属性
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$result->setAttr(Loader::parseName($relation), $relationModel);
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}
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}
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