当前cubic_meter列是字符串。必须将类型转换为双精度。(Laravel)

php artisan make:migration update_table_name --table=table_name

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

class UpdateTableName extends Migration
{
    public function up()
    {
        Schema::table('table_name', function (Blueprint $table) {
            $table->decimal('cubic_meter', 10, 2)->change();
        });
    }

    public function down()
    {
        Schema::table('table_name', function (Blueprint $table) {
            $table->string('cubic_meter')->change();
        });
    }
}

php artisan migrate