找不到类'App \ Http \ Controllers \ App \ Category'

Question

I'm trying to query all products from a category and it's subcategories. But I'm getting this error on my Controller.

Class 'App\Http\Controllers\App\Category' not found

I have a products table

id
name
category_id (fk)

And a categories table:

id
name
parent_id

So if the categories looked like this:

id | title | parent
1  | Electronics | null
2  | Smartphones | 1
3  | Android   | 2
4  | Clothes   | null

And products:

id | title | category_id (fk)
1  | Smartphone1 | 3
1  | Smartphone2 | 2

This is my code on how to do this:

The Category Model - app/category.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class category extends Model
{
    //
    protected $fillable = array('id', 'name', 'parent_id', 'image_url');


    public function products()
    {
        // Build an array containing the parent category ID and all subcategory IDs found
        $categoryIds = array_merge([$this->id], $this->subcategoryIds());

        // Find all products that match the retrieved category IDs 
        return Product::whereIn('category_id', $categoryIds)->get();
    }

    protected function subcategoryIds($id = null, &$ids= [])
    {
        // If no ID is passed, set the current model ID as the parent
        if (is_null($id)) {
            $id = $this->id;
        }

        // Find subcategory IDs
        $categoryIds = $this->query()->where('parent', $id)->lists('id');

        // Add each ID to the list and recursively find other subcategory IDs
        foreach ($categoryIds as $categoryId) {
            $ids[] = $categoryId;
            $ids += $this->subcategoryIds($categoryId, $ids);
        }

        return $ids;
    }
}

And on my app/Http/Controllers/ProductController.php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Http\Requests;
use App\Http\Controllers\Controller;

use DB;
use App\Product;
use App\Category;

use App\Repositories\CategoryRepository;    
public function getProductsFromCategory()
        {

            $id = 1;
            $products = App\Category::find($id)->products();
            return view('welcome', [
                'products' => $products,
            ]);

        }

Answer 1

Replace

$products = App\Category::find($id)->products();

with

$products = Category::find($id)->products();

You've already imported the class and don't have to specify the path again.