DealsFinSeeder.php

<?php

use App\Models\DealFin;
use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\File;

class DealsFinSeeder extends Seeder
{
    public function run()
    {
        DB::table('deal_fins')->delete();

        $json = File::get("database/json/deal_fins.json");
        $data = json_decode($json, true);

        foreach($data as $obj) {
            DealFin::create($obj);
        } // end foreach
    }
}