Relationship 1-n multiple BACKPACK Laravel

Question

I use backpack 5 Pro on last laravel.

I would like to select several data, save them in the database and retrieve them.

I have two tables:

products - id, name

articles - id, title, products_id

In my model Articles.php :

public function produit()
{
    return $this->belongsTo('App\Models\Products', 'products_id', 'id');
}

In my controller ArticlesCrudController.php :

$this->crud->addField(
    [
        'label'     => "Products Links",
        'type'      => 'relationship',
        'name'      => 'produit', 
        'entity'    => 'produit', 
        'model'     => "App\Models\Products",
        'attribute' => 'product_name', 
        'allows_null' => true,
        'multiple'     => true, <--- WANT MULTIPLE SELECT
        'tab' => 'Products links',
        'options'   => (function ($query) {
                    return $query->orderBy('product_name', 'ASC')->get();
        }),
    ]
);

In my Database:

products_id contains: ["15","18"]

Everything works fine except in my results list. It only shows me one result (id: 15) instead of two or more... (15 and 18).

Answer 1

This is not how you can make such relation, you can store only one value within product_id .

Based on your structure, your Product can have multiple Articles, so create two lines (two records in DB) in your articles:

Consider this pseudo code:

$article1 = [
   'id' => 1,
   'title' => 'Article 1',
   'product_id' => 15
];

$article2 = [
   'id' => 1,
   'title' => 'Article 1',
   'product_id' => 15
]

Now Product with ID of 15 has 2 articles (1 and 2).

If you want your Article to have multiple Products and vice-versa then create Many to many relation