Laravel 雄辩的关系

Question

我是 Laravel 的初学者。我在我的项目中使用 Laravel 5.8。

我有这个代码：

Dish.php

class Dish extends Model
{
    protected $quarded = ['id'];
    protected $fillable = ['company_id', 'name', 'description',  'enable'];
    public $timestamps = false;

    public function components()
    {
        return $this->hasManyThrough('App\DishValues', 'App\Dish', 'id', 'dishes_id');
    }
}

DishValues

class DishValues extends Model
{
    protected $quarded = ['id'];
    protected $fillable = ['dishes_id', 'food_ingredient_id', 'quantity'];
    public $timestamps = false;

    public function ingredient()
    {
        return $this->belongsTo('App\FoodIngredient', 'food_ingredient_id');
    }
}

FoodIngredient.php

class FoodIngredient extends Model
{
    use scopeActiveTrait;

    public function scopeVisibleDemo($query)
    {
        return $query->where('available_in_demo', 1);
    }

    protected $quarded = ['id'];
    protected $fillable = ['company_id', 'name', 'garbage', 'energy_value', 'protein', 'fat', 'available_carbohydrates', 'roughage', 'description', 'url_address', 'allergen', 'available_in_demo', 'enable'];
    public $timestamps = false;
}

我得到了我的数据：

Dish::with('components')->paginate(25);

如何从 FoodIngredient 获取此代码值？

这不起作用：

Dish::with('components, ingredient')->paginate(25);

或

Dish::with('components')->with('ingredient')->paginate(25);

Answer 1

鉴于您有多个关系，您可以将 :with() 与值数组一起使用，而不是逗号分隔的字符串。

这个例子来自docs on "Eager Loading Multiple Relationships"，我已经根据你的例子重新命名了模型

App\Dish::with(['components', 'ingredient'])->get();

还有一篇不错的博文以这种方式探索eager/lazy loading of related models。