Parse and transform JSON Objects to an html table using AJAX Response

Question

I am using SYMFONY 3 and i want to parse a received JSON from controller using Ajax , the issue there that the JSON can't be read properly and returns undefined this is my code below :

Controller :

 $em = $this->getDoctrine()->getManager();

            $RAW_QUERY = 'SELECT id,DO_Date,DL_Design,DL_Qte,DL_MontantHT,DL_MontantTTC FROM `facture_ligne` WHERE facture_id=:id';

            $statement = $em->getConnection()->prepare($RAW_QUERY);
            // Set parameters
            $statement->bindValue('id', $id);
            $statement->execute();

            $facture = $statement->fetchAll();

            $serializer = $this->container->get('jms_serializer');
            $reports = $serializer->serialize($facture,'json');
            return new Response($reports); 

My script in a the twig file :

function detailfacture{{ fact.id }} (id) {

    var z= new XMLHttpRequest();
    z.open("get","{{ path('Ajaxonify',{'id':fact.id}) }})",true);
    z.send()
    z.onreadystatechange = function result () {
        var json=z.responseText;
        if(json!="")
        {
            alert(json);

            var tr;
            for (var i = 0; i < json.length; i++) {
                tr = $('<tr/>');
                tr.append("<td>" + json[1].DL_MontantHT + "</td>");
                tr.append("<td>" + json[1].DO_Date + "</td>");
                tr.append("<td>" + json[1].DL_Qte + "</td>");
                $('#tb').append(tr);
            }  
        }
        else alert("helo");    
    }
}

And this some screen shots of the results :

I just tested with a static JSON and it works fine

This is what

console.log(data);
console.log(json);

returns

Answer 1

If you just want to read the JSON, there is a lot of plugins Like JSON Formatter . To use it, just output the JSON and the plugin will identify and activate, formatting JSON for easy reading.

Another answer is pretty print JSON:

PHP: $echo "<pre>".json_encode($data, JSON_PRETTY_PRINT)."</pre>";

JS: document.write(JSON.stringify(data, null,4));

Answer 2

You need to parse the JSON into a JavaScript object before using it, like this:

var json = JSON.parse(json);

Insert this line after alert(json) but before the for loop, so your script looks like this:

function detailfacture{{ fact.id }} (id) {

    var z= new XMLHttpRequest();
    z.open("get","{{ path('Ajaxonify',{'id':fact.id}) }})",true);
    z.send()
    z.onreadystatechange = function result () {
        var json=z.responseText;
        if(json!="")
        {
            alert(json);
            json = JSON.parse(json);

            var tr;
            for (var i = 0; i < json.length; i++) {
                tr = $('<tr/>');
                tr.append("<td>" + json[i].DL_MontantHT + "</td>");
                tr.append("<td>" + json[i].DO_Date + "</td>");
                tr.append("<td>" + json[i].DL_Qte + "</td>");
                $('#tb').append(tr);
            }  
        }
        else alert("helo");    
    }
}