无法在Laravel中的Eloquent集合上合并 [英] Cannot merge on an Eloquent collection in Laravel

问题描述

我需要在Laravel 5.1中合并集合或数组（可以是任意一个），但在Builder.php第2071行中出现错误BadMethodCallException：调用未定义的方法Illuminate\Database\Query\ Builder :: merge（）

I need to merge either a collection or an array (it can be either) in Laravel 5.1, but I am getting the error BadMethodCallException in Builder.php line 2071: Call to undefined method Illuminate\Database\Query\Builder::merge()

当我从头开始创建一个集合时，我可以将其合并，但是我无法合并到Eloquent查询的结果中，我认为也是收藏。但是也许那是不正确的？

When I make a collection from scratch, I can merge to it, but I cannot merge onto the result of an Eloquent query, which I thought were collections as well. But perhaps that is not true?

给出错误的代码：

$user=User::where('user_last_name', 'Doe')->first();
$tomerge = collect(['book' => 'desk', 'foot' => 'chair']);
$newcollect = $user->merge($tomerge);

如果我改为使用$ tomerge-> merge（$ user），它可以工作，但这不是我的工作实际需要。

If I instead did $tomerge->merge($user) it works, but that's not what I actually need. Is there a way to use merge as I want?

推荐答案

要回答有关其为何不起作用的问题...

To answer your question as to why it's not working...

$user = User::where('user_last_name', 'Doe')->first();

这是模型的单个实例。不是收藏。雄辩的模型没有 merge 方法。

This is a single instance of a model. Not a collection. An eloquent model does not have the merge method.

如果要将属性附加到雄辩的模型，则最简单的方法可能是使用 $ appends 属性和适当的访问器。例如，在您的用户模型中。

If you want to append attributes to an Eloquent model, the simplest way is probably to use the $appends property and the appropriate accessor. For example, in your User model..

protected $appends = ['book', 'foot'];

public function getBookAttribute()
{
    return 'desk';
}
public function getFootAttribute()
{
    return 'chair';
}

不过，请注意，这将影响您的User模型的每个实例。

However, note that this will affect every instance of your User model.

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