Laravel Eloquent ORM replicate

本文关键字：replicate ORM Eloquent Laravel | 更新日期: 2023-09-27

我在复制具有所有关系的模型之一时遇到问题。

数据库结构如下：

Table1: products
id
name
Table2: product_options
id
product_id
option
Table3: categories
id
name
Pivot table: product_categories
product_id
category_id

关系是：

产品具有多种product_options
产品属于多类（槽product_categories）

我想克隆具有所有关系的产品。目前这是我的代码：

$product = Product::with('options')->find($id);
$new_product = $product->replicate();
$new_product->push();
foreach($product->options as $option){
    $new_option = $option->replicate();
    $new_option->product_id = $new_product->id;
    $new_option->push();
}

但这不起作用（关系没有克隆 - 目前我只是尝试克隆product_options）。

这段代码对我有用：

$model = User::find($id);
$model->load('invoices');
$newModel = $model->replicate();
$newModel->push();
foreach($model->getRelations() as $relation => $items){
    foreach($items as $item){
        unset($item->id);
        $newModel->{$relation}()->create($item->toArray());
    }
}

从这里回答：克隆一个包含所有关系的雄辩对象？

这个答案（同样的问题）也很好用。

//copy attributes from original model
$newRecord = $original->replicate();
// Reset any fields needed to connect to another parent, etc
$newRecord->some_id = $otherParent->id;
//save model before you recreate relations (so it has an id)
$newRecord->push();
//reset relations on EXISTING MODEL (this way you can control which ones will be loaded
$original->relations = [];
//load relations on EXISTING MODEL
$original->load('somerelationship', 'anotherrelationship');
//re-sync the child relationships
$relations = $original->getRelations();
foreach ($relations as $relation) {
    foreach ($relation as $relationRecord) {
        $newRelationship = $relationRecord->replicate();
        $newRelationship->some_parent_id = $newRecord->id;
        $newRelationship->push();
    }
}

从这里开始：克隆一个包含所有关系的雄辩对象？

根据我的经验，该代码适用于多对多关系。

尝试使用 attach 创建关系：

foreach($product->options as $option){
    $new_option = $option->replicate();
    $new_option->save();
    $new_option_id = $new_option->id;
    $new_product->options()->attach($new_option_id);
}

$product = Product::with('options')->find($id);
$new_product = $product->replicate();
$new_product->{attribute} = {value};
$new_product->push();
$new_product->options()->saveMany($product->options);

这在 5.5 上工作正常。图像，媒体是一个关系名称。

$event = Events::with('image','media')->find($event_id);
            if($event){
                $newevent = $event->replicate();
                $newevent->push();
                 foreach ($newevent->getRelations() as $relation => $entries)
                 {
                    foreach($entries as $entry)
                    {
                        $e = $entry->replicate();
                        if ($e->push())
                        {
                            $newevent->{$relation}()->save($e);
                        }
                    }
                }                                
            }