hainan/app/Http/Controllers/Api/UserFavController.php

<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\AgentProduct;
use App\Models\UserFav;

class UserFavController extends Controller
{
	public function index()
	{
		$page = request()->input('page');
		if ($page && !ctype_digit($page)) {
			return $this->error('页码错误');
		}

		$list = UserFav::query()->with([
				'agentProduct' => fn($query) => $query->select('id', 'price', 'original_price'),
				'product' => fn($query) => $query->select('id', 'title', 'pictures'),
			])
			->where('user_id', $this->user_id)
			->select('id', 'agent_product_id', 'product_id', 'created_at')
			->orderBy('id', 'DESC')
			->simplePaginate(15);
		return $this->success($list);
	}

	public function create()
	{
		$id = request()->input('id');
		if (!$id || !ctype_digit($id)) {
			return $this->error('无效的ID');
		}

		$agent_product = AgentProduct::find($id);
		if (!$agent_product) {
			return $this->error('产品不存在或已被删除');
		}

		//如果不存在则创建
		UserFav::query()->firstOrCreate([
			'user_id' => $this->user_id,
			'agent_product_id' => $agent_product->id,
			'product_id' => $agent_product->product_id,
		]);

		return $this->success();
	}
}