When working with a client side database, I am trying to filter the results which works when passing a string such as;

{id:1}

Searching for id = 1, but when I am passing a variable through the function it becomes;

{id:'1'} which is not working with the database.

Is there a way to remove the '' being added?

        fieldName = "category_id";
        var field = {};
        field[fieldName] = sort;