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319 lines
10 KiB
319 lines
10 KiB
10 months ago
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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) 2006~2018 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\Query;
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use think\Loader;
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use think\Model;
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use think\model\Relation;
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class HasMany extends Relation
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{
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/**
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* 构造函数
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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 当前模型主键
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*/
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public function __construct(Model $parent, $model, $foreignKey, $localKey)
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{
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$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->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 $closure 闭包查询条件
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* @return false|\PDOStatement|string|\think\Collection
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*/
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public function getRelation($subRelation = '', $closure = null)
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{
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if ($closure) {
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call_user_func_array($closure, [ & $this->query]);
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}
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$list = $this->relation($subRelation)->select();
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$parent = clone $this->parent;
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foreach ($list as &$model) {
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$model->setParent($parent);
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}
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return $list;
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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 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 $closure 闭包
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* @return void
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*/
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public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure)
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{
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$localKey = $this->localKey;
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$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->$localKey)) {
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$range[] = $result->$localKey;
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}
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}
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if (!empty($range)) {
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$data = $this->eagerlyOneToMany($this->query, [
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$this->foreignKey => [
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'in',
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$range,
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],
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], $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 $result) {
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if (!isset($data[$result->$localKey])) {
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$data[$result->$localKey] = [];
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}
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foreach ($data[$result->$localKey] as &$relationModel) {
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$relationModel->setParent(clone $result);
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}
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$result->setRelation($attr, $this->resultSetBuild($data[$result->$localKey]));
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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
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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 $closure 闭包
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* @return void
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*/
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public function eagerlyResult(&$result, $relation, $subRelation, $closure)
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{
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$localKey = $this->localKey;
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if (isset($result->$localKey)) {
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$data = $this->eagerlyOneToMany($this->query, [$this->foreignKey => $result->$localKey], $relation, $subRelation, $closure);
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// 关联数据封装
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if (!isset($data[$result->$localKey])) {
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$data[$result->$localKey] = [];
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}
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foreach ($data[$result->$localKey] as &$relationModel) {
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$relationModel->setParent(clone $result);
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}
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$result->setRelation(Loader::parseName($relation), $this->resultSetBuild($data[$result->$localKey]));
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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 $closure 闭包
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* @return integer
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*/
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public function relationCount($result, $closure)
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{
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$localKey = $this->localKey;
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$count = 0;
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if (isset($result->$localKey)) {
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if ($closure) {
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call_user_func_array($closure, [ & $this->query]);
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}
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$count = $this->query->where($this->foreignKey, $result->$localKey)->count();
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}
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return $count;
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}
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/**
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* 创建关联统计子查询
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* @access public
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* @param \Closure $closure 闭包
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* @param string $name 统计数据别名
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* @return string
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*/
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public function getRelationCountQuery($closure, &$name = null)
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{
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if ($closure) {
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$return = call_user_func_array($closure, [ & $this->query]);
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if ($return && is_string($return)) {
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$name = $return;
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}
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}
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$localKey = $this->localKey ?: $this->parent->getPk();
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return $this->query->whereExp($this->foreignKey, '=' . $this->parent->getTable() . '.' . $localKey)->fetchSql()->count();
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}
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/**
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* 一对多 关联模型预查询
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* @access public
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* @param object $model 关联模型对象
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* @param array $where 关联预查询条件
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* @param string $relation 关联名
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* @param string $subRelation 子关联
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* @param bool $closure
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* @return array
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*/
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protected function eagerlyOneToMany($model, $where, $relation, $subRelation = '', $closure = false)
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{
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$foreignKey = $this->foreignKey;
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// 预载入关联查询 支持嵌套预载入
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if ($closure) {
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call_user_func_array($closure, [ & $model]);
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}
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$list = $model->removeWhereField($foreignKey)->where($where)->with($subRelation)->select();
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// 组装模型数据
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$data = [];
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foreach ($list as $set) {
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$data[$set->$foreignKey][] = $set;
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}
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return $data;
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}
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/**
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* 保存（新增）当前关联数据对象
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* @access public
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* @param mixed $data 数据 可以使用数组 关联模型对象 和 关联对象的主键
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* @return Model|false
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*/
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public function save($data)
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{
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if ($data instanceof Model) {
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$data = $data->getData();
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}
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// 保存关联表数据
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$data[$this->foreignKey] = $this->parent->{$this->localKey};
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$model = new $this->model();
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return $model->save($data) ? $model : false;
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}
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/**
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* 创建关联对象实例
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* @param array $data
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* @return Model
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*/
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public function make($data = [])
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{
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if ($data instanceof Model) {
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$data = $data->getData();
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}
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// 保存关联表数据
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$data[$this->foreignKey] = $this->parent->{$this->localKey};
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return new $this->model($data);
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}
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/**
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* 批量保存当前关联数据对象
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* @access public
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* @param array $dataSet 数据集
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* @return integer
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*/
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public function saveAll(array $dataSet)
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{
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$result = false;
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foreach ($dataSet as $key => $data) {
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$result = $this->save($data);
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}
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return $result;
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}
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/**
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* 根据关联条件查询当前模型
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* @access public
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* @param string $operator 比较操作符
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* @param integer $count 个数
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* @param string $id 关联表的统计字段
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* @param string $joinType JOIN类型
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* @return Query
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*/
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public function has($operator = '>=', $count = 1, $id = '*', $joinType = 'INNER')
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{
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$table = $this->query->getTable();
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$model = basename(str_replace('\\', '/', get_class($this->parent)));
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$relation = basename(str_replace('\\', '/', $this->model));
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return $this->parent->db()
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->alias($model)
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->field($model . '.*')
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->join([$table => $relation], $model . '.' . $this->localKey . '=' . $relation . '.' . $this->foreignKey, $joinType)
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->group($relation . '.' . $this->foreignKey)
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->having('count(' . $id . ')' . $operator . $count);
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}
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/**
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* 根据关联条件查询当前模型
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* @access public
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* @param mixed $where 查询条件（数组或者闭包）
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* @param mixed $fields 字段
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* @return Query
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*/
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public function hasWhere($where = [], $fields = null)
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{
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$table = $this->query->getTable();
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$model = basename(str_replace('\\', '/', get_class($this->parent)));
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$relation = basename(str_replace('\\', '/', $this->model));
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if (is_array($where)) {
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foreach ($where as $key => $val) {
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if (false === strpos($key, '.')) {
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$where[$relation . '.' . $key] = $val;
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unset($where[$key]);
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}
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}
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}
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$fields = $this->getRelationQueryFields($fields, $model);
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return $this->parent->db()->alias($model)
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->field($fields)
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->group($model . '.' . $this->localKey)
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->join([$table => $relation], $model . '.' . $this->localKey . '=' . $relation . '.' . $this->foreignKey)
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->where($where);
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}
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/**
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* 执行基础查询（进执行一次）
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* @access protected
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* @return void
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*/
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protected function baseQuery()
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{
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if (empty($this->baseQuery)) {
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if (isset($this->parent->{$this->localKey})) {
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// 关联查询带入关联条件
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$this->query->where($this->foreignKey, $this->parent->{$this->localKey});
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}
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$this->baseQuery = true;
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}
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}
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}
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