questions regarding laravel sidebar - laravel

Question

im new to laravel and i want to know how to make a dynamic sidebar.
Right now it looks like this
In my native language it means category - berrys, juice, candy - and each of them goes to a view, where there should be only products who have in the database one of these three in the "category" column.
My question are:
1)Can i do it with a foreach loop?
2)Do i need to make a model and controller for each of them and if i do what functions do i need?
3)How do i show only the produkcts that have the right category
Right now i have:
#foreach($products as $item)
<div class="col-sm-6 col-md-4">
<a href="details/{{$item['id']}}">
<div class="thumbnail">
<img src="images/{{$item['galerija']}}" alt="...">
<div class="caption">
<h3>{{$item['nosaukums']}}</h3>
<p>{{$item['cena']}}</p>
</div>
</div>
</a>
</div>
#endforeach
That shows every product. Do i need something similar?
More details.
In my controller:
function shop()
{
$data= Product::all();
return view('pages.shop',['products'=>$data]);
}
My moddel:
class Product extends Model{
protected $primaryKey = 'id';
public $timestamps = false;
protected $fillable = [
'nosaukums', 'cena', 'kategorija', 'galerija', 'apraksts',
];
}

Answer 1

Yes.
Since it's the same model, you only need one controller with one method (if you follow conventions this would be a show method).
Using a relation.
Due to the fact you're coding in your native language (which I cannot decipher), below example is a way of how you could do it.
P.S. In the case that a product can have more than one categories, you should convert the relation into a Many to Many using a pivot table.
Category model
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Model;
class Category extends Model
{
public function products(): HasMany
{
return $this->hasMany(Product::class);
}
}
Product model
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Model;
class Product extends Model
{
public function category(): BelongsTo
{
return $this->belongsTo(Category::class);
}
}
Web.php
Route::get('categories/{category}', [CategoryController::class, 'show'])->name('categories.show');
Sidebar view
Note: You can load $categories using a View Composer.
<div>
#foreach($categories as $category)
<a href="{{ route('categories.show', compact('category')) }}">
{{ $category->name }}
</a>
#endforeach
</div>
Category controller
<?php
namespace App\Http\Controllers;
use App\Models\Category;
class CategoryController extends Controller
{
public function show(Category $category)
{
$products = $category->products;
return view('categories.show', compact('products');
}
}