Question

如何通过中间国家/地区表执行某种belongsToThrough来获取计划的货币？

这是我的数据库结构：

plan
    id - integer
    country_id - string // country.code

country
    code - string
    currency_id - string // currency.code

currency
    code - string

我需要在计划模型中建立currency()关系：

我已经尝试了几次无济于事。我认为这样的东西，但这只是返回null：

class Plan extends \Illuminate\Database\Eloquent\Model
{
    public function currency()
    {
        return $this->belongsTo(
            Currency::class, // $related,
            'currency_id', // $foreignKey = null,
            'code', // $ownerKey = null,
            'country' // $relation = null
        );
    }

Answer 1

您需要两个BelongsTo关系：

class Plan extends \Illuminate\Database\Eloquent\Model
{
    public function country()
    {
        return $this->belongsTo(Country::class, 'country_id', 'code');
    }
}

class Country extends \Illuminate\Database\Eloquent\Model
{
    public function currency()
    {
        return $this->belongsTo(Currency::class, 'currency_id', 'code');
    }
}

$currency = $plan->country->currency;

如果您想一步获取货币：

class Plan extends \Illuminate\Database\Eloquent\Model
{
    public function getCurrencyAttribute()
    {
        return $this->country->currency;
    }
}

$currency = $plan->currency;

Answer 2

就我而言，我有

ShopOwner ->（必须）商店->（必须）员工

现在，我想获取Employees中的所有ShopOwner。这表示由ShopOwner过滤的员工列表。

我的员工模型：

<?php

namespace Modules\ShopOwner\Entities;

use Illuminate\Database\Eloquent\Model;

class Employees extends Model
{
    public function shop()
    {
        return $this->belongsTo('\Modules\ShopOwner\Entities\Shops', 'shop_id');
    }

    public function scopeByShopowner($query, $shopownerId)
    {
        return $query->whereHas('shop', function ($query_shop) use ($shopownerId) {
            $query_shop->where('shopowner_id', $shopownerId);
        });
    }
}

所以现在我可以使用：

Modules\ShopOwner\EntitiesEmployees::byShopowner($shopownerId)->get();

属于通过方法

2 个答案: