php artisan make:model ChatMessage -m

vi database/migrations/2020_XX_XX_XXXXXXX_create_chat_messages_table.php
Schema::create('chat_messages', function (Blueprint $table) {
    increments('id');
    integer('from')->nullable();
    integer('to')->nullable();
    integer('group')->nullable();
    integer('readed')->nullable();
    integer('type')->nullable();
    text('body')->nullable();
    timestamps();
});

php artisan migrate
vi app/ChatMessage.php
class ChatMessage extends Model
{
    //
    protected $guarded = ['id'];
}