baoshi-was/database/seeds/WaybillFinancialSnapshotsSeeder.php

<?php

use Illuminate\Database\Seeder;

class WaybillFinancialSnapshotsSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        \App\WaybillFinancialSnapshot::create([
            'waybill_id'=>1,
            'json_content'=>'{a:1}'
        ]);
    }
}