Getting Values from Nested Relationships in Laravel

May 4, 2018 By - Usama Muneer | 387

    Maintaining Database Relationships in Laravel is quite a task but when it comes to nested relationships, things get a bit tangled up to handle.

    In the below example, we’ll look on how to handle nested relationships situation in Laravel.

    Please note, this example will not include any steps for creating database migrations and seeders.

    Scenario

    Let’s take an example for customers & products and their corresponding types. The Relation between Customer and Product &¬†between Product and Type is hasMany respectively. We’ll go through these below.

    Customer Model

    public function product() {
       //foreign_key, local_key
       return $this->hasMany( 'App\Product', 'customer_id', 'id' );
    }

    Product Model

    public function type() {
       return $this->hasMany( 'App\Type' );
    }

    Now with the simple setup for our relationship we’re ready to get data from our DB.

    Getting data from nested relationship

    Consider that we’ll be needing to fetch customer’s selected type name for some product.

    $customer = Customer::with('product.type')->findOrFail($customer_id);
    $items = collect();
    $m->product->each(function($q) use(&$items) {
     $items = $items->concat($q->type);
    });
    $name = $items->pluck('name');
    dd($name);

    Conclusion

    If you’ve any questions or feedback regarding this code. Please leave us a comment below or you can also follow us on Twitter.

    blog user
    Usama Muneer

    A web enthusiastic, self-motivated & detail-oriented professional Full-Stack Web Developer from Karachi, Pakistan with experience in developing applications using JavaScript, WordPress & Laravel specifically. Loves to write on different web technologies with an equally useful skill to make some sense out of it.

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