Laravel Eloquent ORM 复制
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【中文标题】Laravel Eloquent ORM 复制【英文标题】:Laravel Eloquent ORM replicate 【发布时间】:2016-07-01 11:32:07 【问题描述】:我在使用所有关系复制我的一个模型时遇到问题。
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:
product hasMany product_options product belongsToMany 类别(通过 product_categories)我想克隆一个包含所有关系的产品。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(关系未克隆 - 目前我只是尝试克隆 product_options)。
【问题讨论】:
这个答案:***.com/questions/23895126/… 这个答案:***.com/questions/23895126/… 为我工作 您能否将您的评论移至答案? 【参考方案1】: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($e);
【讨论】:
【参考方案2】:$product = Product::with('options')->find($id);
$new_product = $product->replicate();
$new_product->attribute = value;
$new_product->push();
$new_product->options()->saveMany($product->options);
【讨论】:
您应该解释您的答案,以便提问者(以及找到它的任何其他人)了解此代码的作用。 以这种方式使用 saveMany 不会添加新记录,只会用新模型的值覆盖外键【参考方案3】: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:Clone an Eloquent object including all relationships?
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;
$newRelationship->push();
从这里:Clone an Eloquent object including all relationships?
根据我的经验,该代码适用于多对多关系。
【讨论】:
【参考方案4】:尝试使用attach
创建关系:
foreach($product->options as $option)
$new_option = $option->replicate();
$new_option->save();
$new_option_id = $new_option->id;
$new_product->options()->attach($new_option_id);
【讨论】:
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