Looping through dynamic JSON data using javascript

Question

I am trying to display JSON data but the key value is dynamic it varies from one POST request to another my data hierarchy is as shown in diagram:

This is the part of the code I am running,Can anyone suggest me how to display JSON data where key showed in redbox gonna change for every POST request

$.ajax({
  type: "POST",
  url: "/",
  dataType:'json',
  data : { 'perfid': valueOne, 'hostname': $("#host").val(), 'iteration': valueThree},
  success: function(data) {
    $('#img1').hide();
    var k = data[$("#host").val()].iscsi_lif.result.sectoutput.sect.length; 
    for(var i = 0; i < k; i++) {
                var obj = k[i];
                console.log(obj);
                var iscsi =  parseInt(data[$("#host").val()].iscsi_lif.result.sectoutput.sect.obj.avg_latency);
console.log(iscsi);
             }

While running above snippet I am getting following error message :

data[$(....).val(...)].iscsi_lif.result.sectoutput.sect is undefined

Ya..I tried with that too but still it is not able to fetch data giving same kind of error. — Ankita Dhawale
– Ankita Dhawale, Commented Jan 29, 2016 at 10:42
share some json keys please, update your question with a example snippet, this solution should work — rmjoia
– rmjoia, Commented Jan 29, 2016 at 10:44

Mitch · Accepted Answer · 2016-01-29 11:00:00Z

1

You can use a "for in" loop to iterate over the keys of an object without having to specify the key names.

for( var key in myObject){
  myValue = myObject[key];
  // key will be your dynamically created keyname
}

So your code could be similar to the following:

...  
success: function(data) {
  $('#img1').hide();
  var obj = data[$("#host").val()].iscsi_lif.result.sectoutput.sect; 
  for(var key in obj) {
    if(obj.hasOwnProperty(key)){
      var iscsi = parseInt(obj[key].avg_latency);
      console.log(iscsi);
    }
  }
}

edited Jan 29, 2016 at 11:00

answered Jan 29, 2016 at 10:47

Mitch

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1 Comment

rmjoia Over a year ago

actually, if you run that forin loop, you will get object prototype keys => objects, you should use an if clause to return only properties.

rmjoia · Accepted Answer · 2016-01-29 10:43:39Z

0

Solution Suggestion:

for (var key in object) {
    if (object.hasOwnProperty(key)) {
        var element = object[key];

    }
}

Yet, in your situation, maybe you'll have to do this multiple times, so I would try to extract a generic function to do this and "normalize" the processing result to an expected format that wouldn't change.

The function will only run when the expected keys exist and since the forin loop uses the object keys, every object is processed dynamically.

answered Jan 29, 2016 at 10:43

rmjoia

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Comments

tedcurrent · Accepted Answer · 2016-01-29 10:44:32Z

0

This should work:

var k = data[$("#host").val()].iscsi_lif.result.sectoutput.sect;
for (var i = 0; i < k.length; i++) {
  var obj = k[i];
  console.log(obj);
  var iscsi = parseInt(data[$("#host").val()].iscsi_lif.result.sectoutput.sect[obj].avg_latency);
  console.log(iscsi);
}

The variable should be put inside brackets. Also, it seemed to me that k was simply defined as length of an array, I removed that and put it to the for loop.

answered Jan 29, 2016 at 10:44

tedcurrent

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Comments

Zakaria Acharki · Accepted Answer · 2016-01-29 10:45:14Z

0

Since you have obj defined as varible you should use [], so it will be [obj], e.g :

var iscsi =  parseInt(data[$("#host").val()].iscsi_lif.result.sectoutput.sect[obj].avg_latency);

Hope this helps.

answered Jan 29, 2016 at 10:45

Zakaria Acharki

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