Laravel 5 MassAssignmentException在Fillable已经设置的更新？

I'm trying to run this:

$model->update(Input::all());

I already have $fillable = ['field1', 'field2']; set in the model

It's still throwing me a MassAssignmentException?

You should use $model->fill(Input::all()) instead of update. So it would look like this:

$model->fill(Input:all());
$model->save();