Translate request to Eloquent Laravel

Assuming you have a User model declared in your project, it may be as follows

WITH HELP FROM ELOQUENT

$actualiza = Usuario::where('id', 8)
             ->update(['asignacion' => 'gestion']);

First we use the where to find the record with id 8 in the table usuarios and then through the update method we pass an associative array, where the key is the name of the column and the value is the new value assigned to that column in that specific id

If you decide on this method and you have columns updated_at in your table; then in your model you must declare the following

public $timestamps = false;

So that this column does not try to be the object of the update, this will only update the data of the columns that you indicate

WITH HELP OF THE QUERY BUILDER FLUENT

$actualiza = \DB::table('usuarios')
                ->where('id', 8)
                ->update(['asignacion' => 'gestion']);

We use the facade \ DB to invoke the table by its name by means of the table method and then the remaining procedure is the same as the one used in Eloquent