Laravel Eloquent ORM 复制

Laravel Eloquent ORM replicate

提问by Zoli

I have a problem with replicating one of my models with all the relationships.

我在使用所有关系复制我的模型之一时遇到问题。

The database structure is as follows:

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

Relationships are:

关系是：

• product hasMany product_options
• product belongsToMany category (trough product_categories)

• 产品有许多 product_options
• 产品属于多类别（通过 product_categories）

I would like to clone a product with all the relationships. Currently here is my code:

我想克隆一个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();
}

But this does not works (the relationships are not cloned - currently I just tried to clone the product_options).

但这不起作用（关系没有被克隆——目前我只是试图克隆 product_options）。

回答by haakym

This code, worked for me:

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());
    }
}

Answer from here: Clone an Eloquent object including all relationships?

从这里回答：克隆一个包含所有关系的 Eloquent 对象？

This answer (same question), also works fine too.

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();
    }
}

From here: Clone an Eloquent object including all relationships?

从这里开始：克隆一个包含所有关系的 Eloquent 对象？

The code works fine for many to many relationships in my experience.

根据我的经验，该代码适用于多对多关系。

回答by alexw

Try using attachto create the relationship:

尝试使用attach来创建关系：

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);
}

回答by Luis Vasquez

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

$new_product->options()->saveMany($product->options);

回答by avinash

This worked fine on 5.5. image , media is a relation name.

这在 5.5 上运行良好。image , media 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);
                        }
                    }

                }                                

            }