laravel 如何在 Eloquent 中使用 DATEDIFF 函数？

How to use DATEDIFF function with Eloquent?

提问by Maciej P?ocki

Here is my code for selecting reservations:

这是我选择预订的代码：

Reservation::select(array(
    'obj_id', 
    'name', 
    'surname',
    'date_from',
    'date_to', 
    'days',
    'status',
    'slug',
    'payable'
));

My question is how to change 'days' to get real diff between date_fromand date_to? I don't have 'days' column in the database, I just want to count them in the SQL query.

我的问题是如何更改“天”以在date_from和之间获得真正的差异date_to？我在数据库中没有“天”列，我只想在 SQL 查询中计算它们。

In pure SQL should be something like that:

在纯 SQL 中应该是这样的：

SELECT DATEDIFF('date_from, date_to) AS Days FROM RESERVATIONS;

How can I do that using Eloquent?

我怎样才能使用 Eloquent 做到这一点？

回答by Abishek

You can use DB::rawfor this.

您可以为此使用DB::raw。

Reservation::select(array(
            'obj_id', 'name', 'surname',
            'date_from', 'date_to', 
            'days',
            'status', 'slug', 'payable', 
            DB::raw("DATEDIFF(date_from,date_to)AS Days"))
))