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125 lines
4.2 KiB
PHP
125 lines
4.2 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) 2006~2016 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\Db;
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use think\db\Query;
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use think\Model;
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use think\model\Relation;
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class HasManyThrough extends Relation
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{
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// 中间关联表外键
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protected $throughKey;
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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 $through 中间模型名
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* @param string $firstkey 关联外键
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* @param string $secondKey 关联外键
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* @param string $localKey 关联主键
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* @param array $alias 别名定义
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*/
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public function __construct(Model $parent, $model, $through, $foreignKey, $throughKey, $localKey, $alias = [])
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{
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$this->parent = $parent;
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$this->model = $model;
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$this->middle = $through;
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$this->foreignKey = $foreignKey;
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$this->throughKey = $throughKey;
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$this->localKey = $localKey;
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$this->alias = $alias;
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$this->query = (new $model)->db();
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}
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// 动态获取关联数据
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public function getRelation()
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{
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return $this->select();
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}
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/**
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* 预载入关联查询
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* @access public
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* @param Query $query 查询对象
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* @param string $relation 关联名
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* @param bool $first 是否需要使用基础表
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* @return void
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*/
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public function eagerly(Query $query, $relation, $subRelation, $closure, $first)
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{
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}
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/**
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* 预载入关联查询 返回数据集
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* @access public
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* @param array $resultSet 数据集
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* @param string $relation 关联名
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* @param string $class 数据集对象名 为空表示数组
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* @return array
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*/
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public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure, $class)
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{
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}
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/**
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* 预载入关联查询 返回模型对象
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* @access public
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* @param Model $result 数据对象
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* @param string $relation 关联名
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* @param string $class 数据集对象名 为空表示数组
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* @return Model
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*/
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public function eagerlyResult(&$result, $relation, $subRelation, $closure, $class)
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{
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}
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public function __call($method, $args)
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{
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static $baseQuery = false;
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if ($this->query) {
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if (empty($baseQuery)) {
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$baseQuery = true;
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$through = $this->middle;
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$model = $this->model;
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$alias = Loader::parseName(basename(str_replace('\\', '/', $model)));
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$throughTable = $through::getTable();
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$pk = (new $this->model)->getPk();
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$throughKey = $this->throughKey;
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$modelTable = $this->parent->getTable();
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$this->query->field($alias . '.*')->alias($alias)
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->join($throughTable, $throughTable . '.' . $pk . '=' . $alias . '.' . $throughKey)
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->join($modelTable, $modelTable . '.' . $this->localKey . '=' . $throughTable . '.' . $this->foreignKey)
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->where($throughTable . '.' . $this->foreignKey, $this->parent->{$this->localKey});
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}
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$result = call_user_func_array([$this->query, $method], $args);
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if ($result instanceof \think\db\Query) {
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$this->option = $result->getOptions();
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return $this;
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} else {
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$this->option = [];
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$baseQuery = false;
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return $result;
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}
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} else {
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throw new Exception('method not exists:' . __CLASS__ . '->' . $method);
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}
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}
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}
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