baoshi-was/database/migrations/2019_11_22_094213_create_units_table.php

<?php

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

class CreateUnitsTable extends Migration
{
    protected $units = ['kg','m³','T','件', '托',"箱",'单',"日","月","m²","年"];
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('units', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->timestamps();
            $table->string('name',50)->unique()->comment('名称');
        });
        for ($i=0;$i<count($this->units);$i++){
            DB::insert(DB::raw("INSERT INTO units(name,created_at,updated_at) VALUES(?,?,?)"),[
                $this->units[$i],date("Y-m-d"),date("Y-m-d")
            ]);
        }
    }

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