問題描述

我在使用所有關系復制我的模型之一時遇到問題.

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

數據庫結構如下:

Table1: products
id
name

Table2: product_options
id
product_id
option

Table3: categories
id
name

Pivot table: product_categories
product_id
category_id

關系是:

• product hasMany product_options
• 產品屬于多類別(通過 product_categories)

我想克隆一個具有所有關系的產品.目前這是我的代碼:

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

$product = Product::with('options')->find($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();
}

但這不起作用(關系未克隆 - 目前我只是嘗試克隆 product_options).

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

推薦答案

這段代碼，對我有用:

$model = User::find($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());
    }
}

從這里回答:克隆一個包含所有關系的 Eloquent 對象?

這個答案(同樣的問題)，也很好用.

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

//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();
    }
}

從這里:克隆一個包含所有關系的 Eloquent 對象?

根據我的經驗，該代碼適用于多對多關系.

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

這篇關于Laravel Eloquent ORM 復制的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！