Laravel:如何使用whereIn方法获取自定义排序的雄辩集合 [英] Laravel: How to get custom sorted eloquent collection using whereIn method

问题描述

我有一个需要检索其模型集合的产品ID数组.数组是这样的:

I have an array of product ids against which I need to retrieve the model collection. The array is something like this:

$ids = array(9, 2, 16, 11, 8, 1, 18);

现在，我正在使用以下代码行来获取集合.

Right now, I'm using the following line of code to get the collection.

$products = Product::whereIn('id', $ids)->get();

但是它将根据产品ID对产品进行排序.例如:1, 2, 8, 9, 11, 16, 18.我需要的是与$ids数组中相同的顺序，即9, 2, 16, 11, 8, 1, 18.

But it sorts the products against their ids. such as: 1, 2, 8, 9, 11, 16, 18. What I need is the same order as in the $ids array i.e 9, 2, 16, 11, 8, 1, 18.

我应该怎么做才能获得与数组中相同的顺序?

What should I do to get the same order as in the array?

推荐答案

使用mysql的Field()函数(如果使用的是mysql数据库)与laravel的DB::raw()类似

Use Field() function of mysql (If you are using mysql database) with DB::raw() of laravel something like

$products = Product::whereIn('id', $ids)
    ->orderBy(DB::raw("FIELD(id,".join(',',$ids).")"))
    ->get();

Field() 返回索引逗号分隔列表的位置

Field() returns the index position of a comma-delimited list

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