Laravel 5.5如何在关系中添加动态条件? [英] Laravel 5.5 How to add dynamic conditions inside a relationship?

问题描述

我有一个关系可以让在特定日期创建的朋友使用静态日期参数

I have a relation to get the friends created on specific date which is working with a static date parameter

public function friends()
{
    return $this->hasMany(Friend::class)->where('created_at','2018-01-31');
}

但是我需要获取一个动态日期，该日期中的$ request变量在关系内不可用.我尝试过这样的方法，

But i need to get it for a dynamic date where the $request variable is unavailable inside a relation. I tried like this which is not working

public function friends($request)
{
    return $this->hasMany(Friend::class)->where('created_at',$request->date);
}

我该如何解决这个问题?

How can i solve this issue?

推荐答案

您可以使用Laravel帮助器功能

You can use Laravel helper function request()

request 函数返回当前请求实例或获取输入项

The request function returns the current request instance or obtains an input item

public function friends()
{
    $date = request('date') ? : '2018-01-31'; // You can choose a default date, here '2018-01-31'

    return $this->hasMany(Friend::class)->where('created_at', $date);
}

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