Вложенные выборки d3.js

I'm trying to create elements foreach datapoint I have and add in a couple different elements to each element based on the current datapoint. I've tried something like:

var g = vis.selectAll("g").data(dd,function(d){ return d.data.name+d.x+d.y+d.s; });

    var gs = g.enter().append("g");         
        g.exit().remove();

    var t = gs.selectAll("text").data(function(d) { console.log(d); return d; });
    t.enter().append("text").attr("x",function(d){ return d.x+d.s/2; })
        .attr("y",function(d){ return d.y+d.s/4; })
        .attr("font-family","Verdana")
        .attr("font-size","9")          
        .attr("text-anchor","middle")
        .text(function(d){ return d.data.name; });      

    t.attr("x",function(d){ return d.x+d.s/2; })
        .attr("y",function(d){ return d.y+d.s/4; })
        .attr("font-family","Verdana")
        .attr("font-size","9")          
        .attr("text-anchor","middle")
        .text(function(d){ return d.data.name; });      

    t.exit().remove();

But all I get are a set of empty elements. Am I doing something obviously wrong?