vendor/topthink/think-orm/src/model/concern/RelationShip.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2019 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think\model\concern;

use Closure;
use think\Collection;
use think\db\BaseQuery as Query;
use think\db\exception\DbException as Exception;
use think\helper\Str;
use think\Model;
use think\model\Relation;
use think\model\relation\BelongsTo;
use think\model\relation\BelongsToMany;
use think\model\relation\HasMany;
use think\model\relation\HasManyThrough;
use think\model\relation\HasOne;
use think\model\relation\HasOneThrough;
use think\model\relation\MorphMany;
use think\model\relation\MorphOne;
use think\model\relation\MorphTo;
use think\model\relation\MorphToMany;
use think\model\relation\OneToOne;

/**
 * 模型关联处理
 */
trait RelationShip
{
    /**
     * 父关联模型对象
     * @var object
     */
    private $parent;

    /**
     * 模型关联数据
     * @var array
     */
    private $relation = [];

    /**
     * 关联写入定义信息
     * @var array
     */
    private $together = [];

    /**
     * 关联自动写入信息
     * @var array
     */