app.filter('decimal2comma', [
function() {// should be altered to suit your needs
    return function(input) {
        var ret=(input)?input.toString().replace(".",","):null;
        if(ret){
            var decArr=ret.split(",");
            if(decArr.length>1){
                var dec=decArr[1].length;
                if(dec===1){ret+="0";}
            }//this is to show prices like 12,20 and not 12,2
        }
        return ret;
    };
}]);