Laravel 5: when persist form data, _token causes mass assignment exception

or

protected $guarded = array();

A mass assignment exception is usually caused because you didn't specify the fillable (or guarded the opposite) attributes in your model. Do this:

class Order extends Eloquent {
    protected $fillable = ['field1', 'foo', 'bar'];
}

This way you also don't have to worry about _token because only the specified fields will be filled and saved in the db no matter what other stuff you pass to the model.