datatable not displaying json fetched data on html table body code example

Example 1: show data of mongoose in html page using ejs

app.get('/profileface', isLoggedIn, function(req, res) {
    // mongoose operations are asynchronous, so you need to wait 
    PracticeModel.find({}, function(err, data) {
        // note that data is an array of objects, not a single object!
        res.render('profileface.ejs', {
            user : req.user,
            practices: data
        });
    });
});

Example 2: how to set JSON data bootstrap treeview with java

var withText = jsondata.map(function(i) {
    i['text'] = i['bibliography_text'];
    return i;
  });

  var nestedData = d3.nest()
    .key(function(d) { return d.country; })
    .key(function(d) { return d.city; })
    .entries(withText);