baoshi-was/database/migrations/2020_07_06_145857_create_signs_table.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateSignsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('signs', function (Blueprint $table) {
            $table->id();
            $table->string('signable_type')->index()->comment('签名类型(表名)');
            $table->string('signable_id')->index()->comment('ID');
            $table->string('field')->nullable()->comment('字段名');
            $table->string('mark')->nullable()->comment('标记');
            $table->timestamp('created_at');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('signs');
    }
}