Question

I am using findOne just to fetch one certain element for my collection.

However, when I do that, all my template functions containing those collections are re-run and the content refreshed. The content is similar, the problem is I am applying styles to some of those elements, and these updates just reset everything as well. More importantly: those refreshes are completely useless.

For example, I have this template:

Template.content.cars = function () {
    alert("I AM RERUN!");
    return Cars.find();
};

And in another function, I am doing this:

Cars.findOne({ _id: Session.get('current_car') }, {});

Why would be the first template re-run? Am I doing something wrong?

Answer 1

I’m not sure why your first template would be re-run: are you sure something else isn’t going on?

But as a general non-answer to your question: you should expect that a template which depends on the entirety of a collection will be re-run many times (for instance as the data loads incrementally when the page first renders). With meteor you need to write your HTML/CSS in such a way that this re-rendering won’t cause problems.

Without knowing more about your problem I can’t really say more than that.