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+<?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) 2006~2019 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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+
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+namespace think\model\relation;
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+
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+use Closure;
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+use think\db\BaseQuery as Query;
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+use think\db\Raw;
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+use think\helper\Str;
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+use think\Model;
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+use think\model\Relation;
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+
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+/**
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+ * 多态多对多关联
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+ */
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+class MorphToMany extends BelongsToMany
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+{
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+
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+ /**
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+ * 多态关联外键
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+ * @var string
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+ */
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+ protected $morphKey;
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+
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+ /**
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+ * 多态字段名
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+ * @var string
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+ */
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+ protected $morphType;
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+
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+ /**
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+ * 多态模型名
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+ * @var string
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+ */
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+ protected $morphClass;
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+
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+ /**
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+ * 是否反向关联
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+ * @var bool
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+ */
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+ protected $inverse;
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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 $middle 中间表名/模型名
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+ * @param string $morphKey 关联外键
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+ * @param string $morphType 多态字段名
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+ * @param string $localKey 当前模型关联键
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+ * @param bool $inverse 反向关联
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+ */
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+ public function __construct(Model $parent, string $model, string $middle, string $morphType, string $morphKey, string $localKey, bool $inverse = false)
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+ {
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+ $this->morphKey = $morphKey;
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+ $this->morphType = $morphType;
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+ $this->inverse = $inverse;
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+ $this->morphClass = $inverse ? $model : get_class($parent);
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+
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+ parent::__construct($parent, $model, $middle, $morphKey, $localKey);
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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 array $subRelation 子关联名
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+ * @param Closure $closure 闭包
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+ * @param array $cache 关联缓存
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+ * @return void
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+ */
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+ public function eagerlyResultSet(array &$resultSet, string $relation, array $subRelation, Closure $closure = null, array $cache = []): void
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+ {
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+ $pk = $resultSet[0]->getPk();
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+ $range = [];
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+
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+ foreach ($resultSet as $result) {
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+ // 获取关联外键列表
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+ if (isset($result->$pk)) {
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+ $range[] = $result->$pk;
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+ }
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+ }
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+
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+ if (!empty($range)) {
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+ // 查询关联数据
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+ $data = $this->eagerlyManyToMany([
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+ ['pivot.' . $this->morphKey, 'in', $range],
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+ ['pivot.' . $this->morphType, '=', $this->morphClass],
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+ ], $subRelation, $closure, $cache);
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+
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+ // 关联数据封装
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+ foreach ($resultSet as $result) {
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+ if (!isset($data[$result->$pk])) {
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+ $data[$result->$pk] = [];
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+ }
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+
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+ $result->setRelation($relation, $this->resultSetBuild($data[$result->$pk], clone $this->parent));
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+ }
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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（单个数据）
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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 array $subRelation 子关联名
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+ * @param Closure $closure 闭包
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+ * @param array $cache 关联缓存
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+ * @return void
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+ */
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+ public function eagerlyResult(Model $result, string $relation, array $subRelation, Closure $closure = null, array $cache = []): void
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+ {
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+ $pk = $result->getPk();
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+
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+ if (isset($result->$pk)) {
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+ $pk = $result->$pk;
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+ // 查询管理数据
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+ $data = $this->eagerlyManyToMany([
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+ ['pivot.' . $this->morphKey, '=', $pk],
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+ ['pivot.' . $this->morphType, '=', $this->morphClass],
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+ ], $subRelation, $closure, $cache);
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+
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+ // 关联数据封装
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+ if (!isset($data[$pk])) {
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+ $data[$pk] = [];
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+ }
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+
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+ $result->setRelation($relation, $this->resultSetBuild($data[$pk], clone $this->parent));
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+ }
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+ }
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+
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+ /**
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+ * 关联统计
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+ * @access public
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+ * @param Model $result 数据对象
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+ * @param Closure $closure 闭包
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+ * @param string $aggregate 聚合查询方法
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+ * @param string $field 字段
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+ * @param string $name 统计字段别名
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+ * @return integer
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+ */
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+ public function relationCount(Model $result, Closure $closure = null, string $aggregate = 'count', string $field = '*', string &$name = null): float
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+ {
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+ $pk = $result->getPk();
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+
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+ if (!isset($result->$pk)) {
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+ return 0;
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+ }
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+
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+ $pk = $result->$pk;
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+
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+ if ($closure) {
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+ $closure($this->getClosureType($closure), $name);
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+ }
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+
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+ return $this->belongsToManyQuery($this->morphKey, $this->localKey, [
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+ ['pivot.' . ($this->inverse ? $this->localKey : $this->morphKey), '=', $pk],
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+ ['pivot.' . $this->morphType, '=', $this->morphClass],
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+ ])->$aggregate($field);
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+ }
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+
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+ /**
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+ * 获取关联统计子查询
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+ * @access public
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+ * @param Closure $closure 闭包
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+ * @param string $aggregate 聚合查询方法
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+ * @param string $field 字段
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+ * @param string $name 统计字段别名
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+ * @return string
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+ */
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+ public function getRelationCountQuery(Closure $closure = null, string $aggregate = 'count', string $field = '*', string &$name = null): string
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+ {
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+ if ($closure) {
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+ $closure($this->getClosureType($closure), $name);
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+ }
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+
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+ return $this->belongsToManyQuery($this->morphKey, $this->localKey, [
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+ ['pivot.' . ($this->inverse ? $this->localKey : $this->morphKey), 'exp', new Raw('=' . $this->parent->db(false)->getTable() . '.' . $this->parent->getPk())],
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+ ['pivot.' . $this->morphType, '=', $this->morphClass],
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+ ])->fetchSql()->$aggregate($field);
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+ }
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+
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+ /**
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+ * BELONGS TO MANY 关联查询
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+ * @access protected
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+ * @param string $foreignKey 关联模型关联键
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+ * @param string $localKey 当前模型关联键
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+ * @param array $condition 关联查询条件
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+ * @return Query
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+ */
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+ protected function belongsToManyQuery(string $foreignKey, string $localKey, array $condition = []): Query
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+ {
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+ // 关联查询封装
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+ $tableName = $this->query->getTable();
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+ $table = $this->pivot->db()->getTable();
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+ $fields = $this->getQueryFields($tableName);
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+
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+ if ($this->withLimit) {
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+ $this->query->limit($this->withLimit);
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+ }
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+
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+ $query = $this->query
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+ ->field($fields)
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+ ->tableField(true, $table, 'pivot', 'pivot__');
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+
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+ if (empty($this->baseQuery)) {
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+ $relationFk = $this->query->getPk();
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+ $query->join([$table => 'pivot'], 'pivot.' . $foreignKey . '=' . $tableName . '.' . $relationFk)
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+ ->where($condition);
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+ }
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+
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+ return $query;
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+ }
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+
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+ /**
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+ * 多对多 关联模型预查询
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+ * @access protected
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+ * @param array $where 关联预查询条件
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+ * @param array $subRelation 子关联
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+ * @param Closure $closure 闭包
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+ * @param array $cache 关联缓存
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+ * @return array
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+ */
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+ protected function eagerlyManyToMany(array $where, array $subRelation = [], Closure $closure = null, array $cache = []): array
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+ {
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+ if ($closure) {
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+ $closure($this->getClosureType($closure));
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+ }
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+
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+ // 预载入关联查询 支持嵌套预载入
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+ $list = $this->belongsToManyQuery($this->morphKey, $this->localKey, $where)
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+ ->with($subRelation)
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+ ->cache($cache[0] ?? false, $cache[1] ?? null, $cache[2] ?? null)
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+ ->select();
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+
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+ // 组装模型数据
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+ $data = [];
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+ foreach ($list as $set) {
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+ $pivot = [];
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+ foreach ($set->getData() as $key => $val) {
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+ if (strpos($key, '__')) {
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+ [$name, $attr] = explode('__', $key, 2);
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+ if ('pivot' == $name) {
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+ $pivot[$attr] = $val;
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+ unset($set->$key);
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+ }
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+ }
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+ }
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+
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+ $key = $pivot[$this->morphKey];
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+
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+ if ($this->withLimit && isset($data[$key]) && count($data[$key]) >= $this->withLimit) {
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+ continue;
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+ }
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+
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+ $set->setRelation($this->pivotDataName, $this->newPivot($pivot));
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+
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+ $data[$key][] = $set;
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+ }
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+
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+ return $data;
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+ }
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+
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+ /**
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+ * 附加关联的一个中间表数据
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+ * @access public
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+ * @param mixed $data 数据 可以使用数组、关联模型对象 或者 关联对象的主键
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+ * @param array $pivot 中间表额外数据
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+ * @return array|Pivot
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+ * @throws Exception
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+ */
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+ public function attach($data, array $pivot = [])
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+ {
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+ if (is_array($data)) {
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+ if (key($data) === 0) {
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+ $id = $data;
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+ } else {
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+ // 保存关联表数据
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+ $model = new $this->model;
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+ $id = $model->insertGetId($data);
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+ }
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+ } elseif (is_numeric($data) || is_string($data)) {
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+ // 根据关联表主键直接写入中间表
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+ $id = $data;
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+ } elseif ($data instanceof Model) {
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+ // 根据关联表主键直接写入中间表
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+ $id = $data->getKey();
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+ }
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+
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+ if (!empty($id)) {
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+ // 保存中间表数据
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+ $pivot[$this->inverse ? $this->localKey : $this->morphKey] = $this->parent->getKey();
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+
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+ $pivot[$this->morphType] = $this->morphClass;
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+ $ids = (array) $id;
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+
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+ foreach ($ids as $id) {
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+ $pivot[$this->inverse ? $this->morphKey : $this->localKey] = $id;
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+
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+ $this->pivot->replace()
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+ ->exists(false)
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+ ->data([])
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+ ->save($pivot);
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+ $result[] = $this->newPivot($pivot);
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+ }
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+
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+ if (count($result) == 1) {
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+ // 返回中间表模型对象
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+ $result = $result[0];
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+ }
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+
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+ return $result;
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+ } else {
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+ throw new Exception('miss relation data');
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+ }
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+ }
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+
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+ /**
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+ * 判断是否存在关联数据
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+ * @access public
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+ * @param mixed $data 数据 可以使用关联模型对象 或者 关联对象的主键
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+ * @return Pivot|false
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+ */
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+ public function attached($data)
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+ {
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+ if ($data instanceof Model) {
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+ $id = $data->getKey();
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+ } else {
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+ $id = $data;
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+ }
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+
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+ $pivot = $this->pivot
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+ ->where($this->inverse ? $this->localKey : $this->morphKey, $this->parent->getKey())
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+ ->where($this->morphType, $this->morphClass)
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+ ->where($this->inverse ? $this->morphKey : $this->localKey, $id)
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+ ->find();
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+
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+ return $pivot ?: false;
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+ }
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+
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+ /**
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+ * 解除关联的一个中间表数据
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+ * @access public
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+ * @param integer|array $data 数据 可以使用关联对象的主键
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+ * @param bool $relationDel 是否同时删除关联表数据
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+ * @return integer
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+ */
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+ public function detach($data = null, bool $relationDel = false): int
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+ {
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+ if (is_array($data)) {
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+ $id = $data;
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+ } elseif (is_numeric($data) || is_string($data)) {
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+ // 根据关联表主键直接写入中间表
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+ $id = $data;
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+ } elseif ($data instanceof Model) {
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+ // 根据关联表主键直接写入中间表
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+ $id = $data->getKey();
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+ }
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+
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+ // 删除中间表数据
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+ $pivot = [
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+ [$this->inverse ? $this->localKey : $this->morphKey, '=', $this->parent->getKey()],
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+ [$this->morphType, '=', $this->morphClass],
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+ ];
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+
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+ if (isset($id)) {
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+ $pivot[] = [$this->inverse ? $this->morphKey : $this->localKey, is_array($id) ? 'in' : '=', $id];
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+ }
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+
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+ $result = $this->pivot->where($pivot)->delete();
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+
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+ // 删除关联表数据
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+ if (isset($id) && $relationDel) {
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+ $model = $this->model;
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+ $model::destroy($id);
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+ }
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+
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+ return $result;
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+ }
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+
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+ /**
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+ * 数据同步
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+ * @access public
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+ * @param array $ids
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+ * @param bool $detaching
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+ * @return array
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+ */
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+ public function sync(array $ids, bool $detaching = true): array
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+ {
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+ $changes = [
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+ 'attached' => [],
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+ 'detached' => [],
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+ 'updated' => [],
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+ ];
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|
|
+
|
|
|
+ $current = $this->pivot
|
|
|
+ ->where($this->inverse ? $this->localKey : $this->morphKey, $this->parent->getKey())
|
|
|
+ ->where($this->morphType, $this->morphClass)
|
|
|
+ ->column($this->inverse ? $this->morphKey : $this->localKey);
|
|
|
+
|
|
|
+ $records = [];
|
|
|
+
|
|
|
+ foreach ($ids as $key => $value) {
|
|
|
+ if (!is_array($value)) {
|
|
|
+ $records[$value] = [];
|
|
|
+ } else {
|
|
|
+ $records[$key] = $value;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ $detach = array_diff($current, array_keys($records));
|
|
|
+
|
|
|
+ if ($detaching && count($detach) > 0) {
|
|
|
+ $this->detach($detach);
|
|
|
+ $changes['detached'] = $detach;
|
|
|
+ }
|
|
|
+
|
|
|
+ foreach ($records as $id => $attributes) {
|
|
|
+ if (!in_array($id, $current)) {
|
|
|
+ $this->attach($id, $attributes);
|
|
|
+ $changes['attached'][] = $id;
|
|
|
+ } elseif (count($attributes) > 0 && $this->attach($id, $attributes)) {
|
|
|
+ $changes['updated'][] = $id;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return $changes;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 创建关联查询Query对象
|
|
|
+ * @access protected
|
|
|
+ * @return Query
|
|
|
+ */
|
|
|
+ protected function buildQuery(): Query
|
|
|
+ {
|
|
|
+ // 关联查询
|
|
|
+ $condition = [
|
|
|
+ ['pivot.' . $this->morphKey, '=', $this->parent->getKey()],
|
|
|
+ ['pivot.' . $this->morphType, '=', $this->morphClass],
|
|
|
+ ];
|
|
|
+
|
|
|
+ return $this->belongsToManyQuery($this->morphKey, $this->localKey, $condition);
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 执行基础查询（仅执行一次）
|
|
|
+ * @access protected
|
|
|
+ * @return void
|
|
|
+ */
|
|
|
+ protected function baseQuery(): void
|
|
|
+ {
|
|
|
+ if (empty($this->baseQuery) && $this->parent->getData()) {
|
|
|
+ $this->query->where([
|
|
|
+ [$this->morphKey, '=', $this->parent->getKey()],
|
|
|
+ [$this->morphType, '=', $this->morphClass],
|
|
|
+ ]);
|
|
|
+
|
|
|
+ $this->baseQuery = true;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+}
|
Anyon