Laravel Eloquent：产品、属性和属性值关系

Question

I've a scenario for product and attributes relationship.

Models:

1. Product (table: products )
2. Attributes (table: attributes )
3. Attribute Values (table: attribute_values , foreign key: attribute_id )

A product can have multiple attributes so this will be easy with many to many relation b/w product and attributes

Model: Attribute

<?php

class Attribute extends Model{
    public function products()
    {
       return $this->belongsToMany(Product::class);
    }
}

Model: Product

class Product extends Model{
    public function attributes()
    {
       return $this->belongsToMany(Attribute::class);
    }
}

but, when assigning an attribute to an item user can opt out one of the attribute value from attribute_values ie, the values assigned to an attribute.

how can I manage this in eloquent way?

Answer 1

I have designed a database schema, is that true?

Answer 2

In this case I would create a Pivot between products and attribute_values, and than you can use it the "Eloquent way" like this:

$products->sync(AttributeValues::where('attribute_id',$attribute_id);

and then if you want to detach a single attribute_value you can detach it using its instance