<?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) 2006~2023 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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declare(strict_types=1);
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namespace think\model;
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use Closure;
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use think\db\BaseQuery as Query;
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use think\db\exception\DbException as Exception;
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use think\Model;
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/**
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* 模型关联基础类.
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*
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* @mixin Query
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*/
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abstract class Relation
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{
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/**
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* 父模型对象
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*
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* @var Model
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*/
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protected $parent;
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/**
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* 当前关联的模型类名.
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*
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* @var string
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*/
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protected $model;
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/**
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* 关联模型查询对象
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*
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* @var Query
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*/
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protected $query;
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/**
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* 关联表外键.
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*
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* @var string
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*/
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protected $foreignKey;
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/**
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* 关联表主键.
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*
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* @var string
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*/
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protected $localKey;
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/**
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* 是否执行关联基础查询.
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*
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* @var bool
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*/
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protected $baseQuery;
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/**
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* 是否为自关联.
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*
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* @var bool
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*/
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protected $selfRelation = false;
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/**
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* 关联数据字段限制.
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*
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* @var array
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*/
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protected $withField;
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/**
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* 排除关联数据字段.
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*
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* @var array
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*/
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protected $withoutField;
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/**
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* 默认数据.
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*
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* @var mixed
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*/
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protected $default;
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/**
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* 获取关联的所属模型.
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*
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* @return Model
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*/
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public function getParent(): Model
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{
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return $this->parent;
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}
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/**
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* 获取当前的关联模型类的Query实例.
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*
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* @return Query
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*/
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public function getQuery()
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{
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return $this->query;
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}
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/**
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* 获取关联表外键.
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*
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* @return string
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*/
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public function getForeignKey(): string
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{
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return $this->foreignKey;
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}
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/**
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* 获取关联表主键.
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*
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* @return string
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*/
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public function getLocalKey(): string
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{
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return $this->localKey;
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}
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/**
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* 获取当前的关联模型类的实例.
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*
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* @return Model
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*/
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public function getModel(): Model
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{
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return $this->query->getModel();
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}
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/**
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* 当前关联是否为自关联.
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*
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* @return bool
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*/
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public function isSelfRelation(): bool
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{
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return $this->selfRelation;
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}
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/**
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* 封装关联数据集.
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*
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* @param array $resultSet 数据集
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* @param Model $parent 父模型
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*
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* @return mixed
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*/
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protected function resultSetBuild(array $resultSet, ?Model $parent = null)
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{
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return (new $this->model())->toCollection($resultSet)->setParent($parent);
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}
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protected function getQueryFields(string $model)
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{
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$fields = $this->query->getOptions('field');
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return $this->getRelationQueryFields($fields, $model);
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}
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protected function getRelationQueryFields($fields, string $model)
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{
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if (empty($fields) || '*' == $fields) {
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return $model . '.*';
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}
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if (is_string($fields)) {
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$fields = explode(',', $fields);
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}
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foreach ($fields as &$field) {
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if (!str_contains($field, '.')) {
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$field = $model . '.' . $field;
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}
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}
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return $fields;
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}
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protected function getQueryWhere(array &$where, string $relation): void
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{
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foreach ($where as $key => &$val) {
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if (is_string($key)) {
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$where[] = [!str_contains($key, '.') ? $relation . '.' . $key : $key, '=', $val];
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unset($where[$key]);
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} elseif (isset($val[0]) && !str_contains($val[0], '.')) {
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$val[0] = $relation . '.' . $val[0];
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}
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}
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}
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/**
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* 获取关联数据默认值
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*
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* @param mixed $data 模型数据
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*
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* @return mixed
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*/
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protected function getDefaultModel($data)
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{
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if (is_array($data)) {
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$model = (new $this->model())->data($data);
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} elseif ($data instanceof Closure) {
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$model = new $this->model();
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$data($model);
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} else {
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$model = $data;
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}
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return $model;
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}
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/**
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* 执行基础查询（仅执行一次）.
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*
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* @return void
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*/
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protected function baseQuery(): void
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{
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}
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public function __call($method, $args)
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{
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if ($this->query) {
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// 执行基础查询
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$this->baseQuery();
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$result = call_user_func_array([$this->query, $method], $args);
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return $result === $this->query ? $this : $result;
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}
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throw new Exception('method not exists:' . __CLASS__ . '->' . $method);
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}
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}
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