[best pratices] virtual resources

[antonio altamura]

Hi, I'm developing a MEAN app. I'm wondering if I made a good choice for this:

I deleted my mongodb collection "presidents" and I exposed this express resource in this way

router.get('/', function(req,res) {

    var presidents=["President","Vice-President","Grand President",...];

    var query = regexp.startsWith(req.query.q)

    var ret= []

    presidents.forEach(function (el) {

        if (query.test(el)) ret.push(el)

    });

    return res.json(ret)

});

So no more extra mongodb collection for this. Obiouvsly the presidents in my case can't change, I use this array  just for an autocomplete text field.

Do you think it's a good pratice make those 'immutable' collection like this?