如何在中间 table 中获取记录及其相关数据

Question

我有两个模型，类别和品牌具有多对多关系

在类别模型中

public function brands()
    {
        return $this->belongsToMany(Brand::class, 'brand_category', 'category_id', 'brand_id');
    }

和品牌型号

    public function categories()
    {
        return $this->belongsToMany(Category::class, 'brand_category','brand_id','category_id' );
    }

如何获得具有特定类别 ID 的品牌，例如

下面的 json

{
    "data": [
        {
            "brand_id": 1,
            "name": "Sony",
            "description": null,
            "logo": null,
            "is_active": true,
            "created_at": "2020-04-08 15:19:44",
            "updated_at": "2020-04-08 15:19:44",
            "deleted_at": null,
            "pivot": {
                "category_id": 1,
                "brand_id": 1
            }
        },
        {
            "brand_id": 2,
            "name": "Lg",
            "description": null,
            "logo": null,
            "is_active": true,
            "created_at": "2020-04-08 15:19:44",
            "updated_at": "2020-04-08 15:19:44",
            "deleted_at": null,
            "pivot": {
                "category_id": 1,
                "brand_id": 2
            }
        }
    ],
    "success": true,
    "error": {
        "code": 200,
        "data": []
    },
    "message": ""
}

我想通过 wherePivot 找到一种不改变模型关系的方法...

Answer 1

这应该可以。

return Category::find($categoryId)->brands;

如何在中间 table 中获取记录及其相关数据

how to get records with its related data in intermediate table

postman

laravel-6