Relation.php
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<?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;
use think\db\Query;
use think\Exception;
use think\Model;
/**
* Class Relation
* @package think\model
*
* @mixin Query
*/
abstract class Relation
{
// 父模型对象
protected $parent;
/** @var Model 当前关联的模型类 */
protected $model;
/** @var Query 关联模型查询对象 */
protected $query;
// 关联表外键
protected $foreignKey;
// 关联表主键
protected $localKey;
// 基础查询
protected $baseQuery;
/**
* 获取关联的所属模型
* @access public
* @return Model
*/
public function getParent()
{
return $this->parent;
}
/**
* 获取当前的关联模型类
* @access public
* @return string
*/
public function getModel()
{
return $this->model;
}
/**
* 获取关联的查询对象
* @access public
* @return Query
*/
public function getQuery()
{
return $this->query;
}
/**
* 封装关联数据集
* @access public
* @param array $resultSet 数据集
* @return mixed
*/
protected function resultSetBuild($resultSet)
{
return (new $this->model)->toCollection($resultSet);
}
protected function getQueryFields($model)
{
$fields = $this->query->getOptions('field');
return $this->getRelationQueryFields($fields, $model);
}
protected function getRelationQueryFields($fields, $model)
{
if ($fields) {
if (is_string($fields)) {
$fields = explode(',', $fields);
}
foreach ($fields as &$field) {
if (false === strpos($field, '.')) {
$field = $model . '.' . $field;
}
}
} else {
$fields = $model . '.*';
}
return $fields;
}
/**
* 执行基础查询（仅执行一次）
* @access protected
* @return void
*/
protected function baseQuery()
{}
public function __call($method, $args)
{
if ($this->query) {
// 执行基础查询
$this->baseQuery();
$result = call_user_func_array([$this->query, $method], $args);
if ($result instanceof Query) {
return $this;
} else {
$this->baseQuery = false;
return $result;
}
} else {
throw new Exception('method not exists:' . __CLASS__ . '->' . $method);
}
}
}