324 lines
10 KiB
PHP
324 lines
10 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) 2006~2018 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 Closure;
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use think\Loader;
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use think\Model;
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class BelongsTo extends OneToOne
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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 $foreignKey 关联外键
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* @param string $localKey 关联主键
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* @param string $relation 关联名
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*/
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public function __construct(Model $parent, $model, $foreignKey, $localKey, $relation = null)
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{
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$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->joinType = 'INNER';
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$this->query = (new $model)->db();
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$this->relation = $relation;
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if (get_class($parent) == $model) {
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$this->selfRelation = true;
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}
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}
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/**
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* 延迟获取关联数据
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* @access public
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* @param string $subRelation 子关联名
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* @param \Closure $closure 闭包查询条件
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* @return Model
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*/
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public function getRelation($subRelation = '', $closure = null)
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{
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if ($closure instanceof Closure) {
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$closure($this->query);
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}
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$foreignKey = $this->foreignKey;
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$relationModel = $this->query
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->removeWhereField($this->localKey)
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->where($this->localKey, $this->parent->$foreignKey)
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->relation($subRelation)
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->find();
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if ($relationModel) {
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$relationModel->setParent(clone $this->parent);
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}
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return $relationModel;
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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 $aggregate 聚合查询方法
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* @param string $field 字段
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* @param string $aggregateAlias 聚合字段别名
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* @return string
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*/
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public function getRelationCountQuery($closure, $aggregate = 'count', $field = '*', &$aggregateAlias = '')
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{
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if ($closure instanceof Closure) {
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$return = $closure($this->query);
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if ($return && is_string($return)) {
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$aggregateAlias = $return;
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}
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}
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return $this->query
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->whereExp($this->localKey, '=' . $this->parent->getTable() . '.' . $this->foreignKey)
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->fetchSql()
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->$aggregate($field);
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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 $name 统计字段别名
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* @return integer
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*/
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public function relationCount($result, $closure, $aggregate = 'count', $field = '*', &$name = '')
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{
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$foreignKey = $this->foreignKey;
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if (!isset($result->$foreignKey)) {
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return 0;
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}
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if ($closure instanceof Closure) {
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$return = $closure($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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return $this->query
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->where($this->localKey, '=', $result->$foreignKey)
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->$aggregate($field);
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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('\\', '/', $this->model));
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$localKey = $this->localKey;
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$foreignKey = $this->foreignKey;
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$softDelete = $this->query->getOptions('soft_delete');
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return $this->parent->db()
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->alias($model)
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->whereExists(function ($query) use ($table, $model, $relation, $localKey, $foreignKey) {
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$query->table([$table => $relation])
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->field($relation . '.' . $localKey)
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->whereExp($model . '.' . $foreignKey, '=' . $relation . '.' . $localKey)
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->when($softDelete, function ($query) use ($softDelete, $relation) {
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$query->where($relation . strstr($softDelete[0], '.'), '=' == $softDelete[1][0] ? $softDelete[1][1] : null);
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});
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});
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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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$this->getQueryWhere($where, $relation);
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}
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$fields = $this->getRelationQueryFields($fields, $model);
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$softDelete = $this->query->getOptions('soft_delete');
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return $this->parent->db()
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->alias($model)
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->field($fields)
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->join([$table => $relation], $model . '.' . $this->foreignKey . '=' . $relation . '.' . $this->localKey, $this->joinType)
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->when($softDelete, function ($query) use ($softDelete, $relation) {
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$query->where($relation . strstr($softDelete[0], '.'), '=' == $softDelete[1][0] ? $softDelete[1][1] : null);
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})
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->where($where);
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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 protected
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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 $closure 闭包
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* @return void
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*/
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protected function eagerlySet(&$resultSet, $relation, $subRelation, $closure)
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{
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$localKey = $this->localKey;
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$foreignKey = $this->foreignKey;
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$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->$foreignKey)) {
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$range[] = $result->$foreignKey;
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}
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}
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if (!empty($range)) {
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$this->query->removeWhereField($localKey);
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$data = $this->eagerlyWhere([
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[$localKey, 'in', $range],
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], $localKey, $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 $result) {
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// 关联模型
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if (!isset($data[$result->$foreignKey])) {
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$relationModel = null;
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} else {
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$relationModel = $data[$result->$foreignKey];
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$relationModel->setParent(clone $result);
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$relationModel->isUpdate(true);
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}
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if (!empty($this->bindAttr)) {
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// 绑定关联属性
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$this->bindAttr($relationModel, $result);
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} else {
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// 设置关联属性
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$result->setRelation($attr, $relationModel);
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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（数据）
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* @access protected
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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 $closure 闭包
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* @return void
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*/
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protected function eagerlyOne(&$result, $relation, $subRelation, $closure)
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{
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$localKey = $this->localKey;
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$foreignKey = $this->foreignKey;
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$this->query->removeWhereField($localKey);
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$data = $this->eagerlyWhere([
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[$localKey, '=', $result->$foreignKey],
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], $localKey, $relation, $subRelation, $closure);
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// 关联模型
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if (!isset($data[$result->$foreignKey])) {
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$relationModel = null;
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} else {
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$relationModel = $data[$result->$foreignKey];
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$relationModel->setParent(clone $result);
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$relationModel->isUpdate(true);
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}
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if (!empty($this->bindAttr)) {
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// 绑定关联属性
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$this->bindAttr($relationModel, $result);
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} else {
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// 设置关联属性
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$result->setRelation(Loader::parseName($relation), $relationModel);
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}
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}
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/**
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* 添加关联数据
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* @access public
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* @param Model $model 关联模型对象
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* @return Model
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*/
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public function associate($model)
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{
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$this->parent->setAttr($this->foreignKey, $model->getKey());
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$this->parent->save();
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return $this->parent->setRelation($this->relation, $model);
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}
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/**
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* 注销关联数据
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* @access public
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* @return Model
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*/
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public function dissociate()
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{
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$this->parent->setAttr($this->foreignKey, null);
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$this->parent->save();
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return $this->parent->setRelation($this->relation, null);
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}
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/**
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* 执行基础查询（仅执行一次）
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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->{$this->foreignKey})) {
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// 关联查询带入关联条件
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$this->query->where($this->localKey, '=', $this->parent->{$this->foreignKey});
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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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