Laravel计数> ñ [英] Laravel Where Count > N

问题描述

我的应用程序中有2个模型：

I have 2 models in my app:

1。 Customer.php

2。 Car.php

现在，我想运行一个查询，以返回所有少于2辆汽车的客户。其中2是可以由用户更改的数字。

Now I would like to run a query that returns all customers that have less than 2 cars. Where 2 is a number that can be changed by the user.

我已经尝试过了，但是没有用，它只会返回所有客户记录：

I have tried this but it didn't work, it just returns all customer records:

$customers = Customer::whereHas("cars", function($query) {
    $query->selectRaw("count(*) < ?", [2]);
})
->get();

编辑：
两种模型以枢轴方式链接表，表示一个客户可以拥有多于1辆汽车，而一辆汽车可以属于多于1个客户。

The two models are linked in a pivot table, meaning A customer can have more than 1 car and a Car can belong to more than 1 customer.

推荐答案

使用以下命令：

$customers = Customer::withCount('cars')
    ->having('cars_count', '<', 2)
    ->get();

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