Question

我想将category_id附加到seat集合中，但是我需要使用热切的加载或关联来填充它。

我在哪里做错了？

座位型号：

class Seat extends Model
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    public $appends = ['category_id'];

    protected $fillable = [
        'seat_name',
        'seat_url',
        'logo_src',
    ];

    public function getCategoryIdAttribute()
    {
        return $this->hasMany(AdSeatCategories::class);
    }

}

当我运行Seat::all();时，我得到{}的{{1}}作为响应。响应示例：

category_id

Answer 1

您的getCategoryIdAttribute()似乎正在返回一个关系，而当您希望它返回集合时，请确保像这样调用get()：

public function getCategoryIdAttribute()
{
    return $this->hasMany(AdSeatCategories::class)->get();
}

或者，也许您想要一个关系和一个属性：

public function categories()
{
    return $this->hasMany(AdSeatCategories::class);
}

public function getCategoryIdsAttribute()
{
    return $this->categories()->get()->pluck('id');
}

Answer 2

您应该将关系与渴望加载的属性分开。

class Seat extends Model
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    public $appends = ['category_id'];

    protected $fillable = [
        'seat_name',
        'seat_url',
        'logo_src',
    ];

    public function getCategoryIdAttribute()
    {
        return $this->categories()->pluck('id');
    }

    public funvtion categories()
    {
        return $this->hasMany(AdSeatCategories::class);
    }

}

使用关系categories的更好解决方案是调用模型Seat。

class Seat extends Model
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */

    protected $fillable = [
        'seat_name',
        'seat_url',
        'logo_src',
    ];

    public funvtion categories()
    {
        return $this->hasMany(AdSeatCategories::class);
    }

}

在控制器中执行：

$seats = Seat::with('categories:id')->get();

在模型的附加属性内急切加载

2 个答案: