显示类别中的帖子（Laravel）

Question

I have some tables:

category:

id: 1 title: Shirt
id: 2 title: Pant
id: 3 title: Hat

product:

... (product has some columns and 1 col is category_id)

And what I want to display in view is:

1. 5 newest posts for all categories
2. 5 newest posts for each category

Basically, it'll look like:

--* Title :All *--

5 Newest posts

--* Title :Shirt *--

5 Newest posts which category_id :1

--* Title :Pant*--

5 Newest posts which category_id :2

--* Title :Hat *--

5 Newest posts which category_id :3

Any advices, I've searched on google but didn't find the answer :((

Answer 1

Since you have two tables, you'd create two models, one for category and one for product. You can do this by running php artisan make:model Category and php artisan make:model Product

Now you have these models in your App/ folder.

Add the following to your category model in App\\Category

public function products()
    {
        return $this->hasMany('\App\Product', 'category_id', 'id');
    }

Go on to the controller that wants to process these data and add at the top

use App\Category;
use App\Product;

1. 5 newest posts for all categories

   $product = Product::take(5)->orderBy('id', 'desc')->get();

2. 5 newest posts for each category

   $categories = Category::get();

   foreach ($Categories as $Category) { $products[$Category->name] = $Category->products()->take(5)->orderBy('id', 'desc')->get(); }

Now to pass this on to the view, i like using a "$data" array, the contents of this array can be accessed directly in the views once passed like so

$data =  array();
$data['all_products'] = $product;
$data['category_products'] = $products;

This can then be passed on as

return View('products.detail', $data);

where products.detail is your view

You can now loop through these data in your view as --* Title :All *--

@foreach($all_products as $product)
{{$product->name}}
@endforeach

Answer 2

If you have category model like this:

class Category extends Model
{
    public function posts()
    {
        return $this->hasMany('\App\Post', 'category_id', 'id');
    }
}

You can take 5 Latest post's of every category easily:

$Categories = Category::get();

foreach ($Categories as $Category) {
    $Posts = $Category->posts()->take(5)->orderBy('id', 'desc')->get(); // Get 5 Posts
}