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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace think\model\relation;
use think\db\Query;
use think\Loader;
use think\Model;
use think\model\Relation;
class HasMany extends Relation
{
/**
* 构造函数
* @access public
* @param Model $parent 上级模型对象
* @param string $model 模型名
* @param string $foreignKey 关联外键
* @param string $localKey 关联主键
*/
public function __construct(Model $parent, $model, $foreignKey, $localKey)
{
$this->parent = $parent;
$this->model = $model;
$this->foreignKey = $foreignKey;
$this->localKey = $localKey;
$this->query = (new $model)->db();
}
/**
* 延迟获取关联数据
* @param string $subRelation 子关联名
* @param \Closure $closure 闭包查询条件
* @return false|\PDOStatement|string|\think\Collection
*/
public function getRelation($subRelation = '', $closure = null)
{
if ($closure) {
call_user_func_array($closure, [ & $this->query]);
}
$list = $this->relation($subRelation)->select();
$parent = clone $this->parent;
foreach ($list as &$model) {
$model->setParent($parent);
}
return $list;
}
/**
* 预载入关联查询
* @access public
* @param array $resultSet 数据集
* @param string $relation 当前关联名
* @param string $subRelation 子关联名
* @param \Closure $closure 闭包
* @return void
*/
public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure)
{
$localKey = $this->localKey;
$range = [];
foreach ($resultSet as $result) {
// 获取关联外键列表
if (isset($result->$localKey)) {
$range[] = $result->$localKey;
}
}
if (!empty($range)) {
$data = $this->eagerlyOneToMany($this, [
$this->foreignKey => [
'in',
$range,
],
], $relation, $subRelation, $closure);
// 关联属性名
$attr = Loader::parseName($relation);
// 关联数据封装
foreach ($resultSet as $result) {
if (!isset($data[$result->$localKey])) {
$data[$result->$localKey] = [];
}
foreach ($data[$result->$localKey] as &$relationModel) {
$relationModel->setParent(clone $result);
}
$result->setRelation($attr, $this->resultSetBuild($data[$result->$localKey]));
}
}
}
/**
* 预载入关联查询
* @access public
* @param Model $result 数据对象
* @param string $relation 当前关联名
* @param string $subRelation 子关联名
* @param \Closure $closure 闭包
* @return void
*/
public function eagerlyResult(&$result, $relation, $subRelation, $closure)
{
$localKey = $this->localKey;
if (isset($result->$localKey)) {
$data = $this->eagerlyOneToMany($this, [$this->foreignKey => $result->$localKey], $relation, $subRelation, $closure);
// 关联数据封装
if (!isset($data[$result->$localKey])) {
$data[$result->$localKey] = [];
}
foreach ($data[$result->$localKey] as &$relationModel) {
$relationModel->setParent(clone $result);
}
$result->setRelation(Loader::parseName($relation), $this->resultSetBuild($data[$result->$localKey]));
}
}
/**
* 关联统计
* @access public
* @param Model $result 数据对象
* @param \Closure $closure 闭包
* @return integer
*/
public function relationCount($result, $closure)
{
$localKey = $this->localKey;
$count = 0;
if (isset($result->$localKey)) {
if ($closure) {
call_user_func_array($closure, [ & $this->query]);
}
$count = $this->query->where([$this->foreignKey => $result->$localKey])->count();
}
return $count;
}
/**
* 创建关联统计子查询
* @access public
* @param \Closure $closure 闭包
* @return string
*/
public function getRelationCountQuery($closure)
{
if ($closure) {
call_user_func_array($closure, [ & $this->query]);
}
return $this->query->where([
$this->foreignKey => [
'exp',
'=' . $this->parent->getTable() . '.' . $this->parent->getPk(),
],
])->fetchSql()->count();
}
/**
* 一对多 关联模型预查询
* @access public
* @param object $model 关联模型对象
* @param array $where 关联预查询条件
* @param string $relation 关联名
* @param string $subRelation 子关联
* @param bool $closure
* @return array
*/
protected function eagerlyOneToMany($model, $where, $relation, $subRelation = '', $closure = false)
{
$foreignKey = $this->foreignKey;
// 预载入关联查询 支持嵌套预载入
if ($closure) {
call_user_func_array($closure, [ & $model]);
}
$list = $model->where($where)->with($subRelation)->select();
// 组装模型数据
$data = [];
foreach ($list as $set) {
$data[$set->$foreignKey][] = $set;
}
return $data;
}
/**
* 保存（新增）当前关联数据对象
* @access public
* @param mixed $data 数据 可以使用数组 关联模型对象 和 关联对象的主键
* @return Model|false
*/
public function save($data)
{
if ($data instanceof Model) {
$data = $data->getData();
}
// 保存关联表数据
$model = new $this->model;
$data[$this->foreignKey] = $this->parent->{$this->localKey};
return $model->save($data) ? $model : false;
}
/**
* 批量保存当前关联数据对象
* @access public
* @param array $dataSet 数据集
* @return integer
*/
public function saveAll(array $dataSet)
{
$result = false;
foreach ($dataSet as $key => $data) {
$result = $this->save($data);
}
return $result;
}
/**
* 根据关联条件查询当前模型
* @access public
* @param string $operator 比较操作符
* @param integer $count 个数
* @param string $id 关联表的统计字段
* @param string $joinType JOIN类型
* @return Query
*/
public function has($operator = '>=', $count = 1, $id = '*', $joinType = 'INNER')
{
$table = $this->query->getTable();
return $this->parent->db()->alias('a')
->join($table . ' b', 'a.' . $this->localKey . '=b.' . $this->foreignKey, $joinType)
->group('b.' . $this->foreignKey)
->having('count(' . $id . ')' . $operator . $count);
}
/**
* 根据关联条件查询当前模型
* @access public
* @param mixed $where 查询条件（数组或者闭包）
* @return Query
*/
public function hasWhere($where = [])
{
$table = $this->query->getTable();
$model = basename(str_replace('\\', '/', get_class($this->parent)));
$relation = basename(str_replace('\\', '/', $this->model));
if (is_array($where)) {
foreach ($where as $key => $val) {
if (false === strpos($key, '.')) {
$where[$relation . '.' . $key] = $val;
unset($where[$key]);
}
}
}
return $this->parent->db()->alias($model)
->field($model . '.*')
->join($table . ' ' . $relation, $model . '.' . $this->localKey . '=' . $relation . '.' . $this->foreignKey)
->where($where);
}
/**
* 执行基础查询（进执行一次）
* @access protected
* @return void
*/
protected function baseQuery()
{
if (empty($this->baseQuery)) {
if (isset($this->parent->{$this->localKey})) {
// 关联查询带入关联条件
$this->query->where($this->foreignKey, $this->parent->{$this->localKey});
}
$this->baseQuery = true;
}
}
}
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