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How to add one more column in jquery datatable which is not present in the json response

I'm using one api in which the response is coming in two columns but in one column there are many parameters, I need to decode one column and want to show in different columns.
Column name coming from api timestamp, dataFrame, I need to show in 3 columns timestamp, oil temperature and winding temperature. I need to add one more column in datatable to show the values in the datatable.
sample json data
[{
"timestamp": "2018-07-21T07:56:23.838Z",
"dataFrame": "HA=="
},
{
"timestamp": "2018-07-21T08:16:23.902Z",
"dataFrame": "HA=="
}
]
output
Expected Output
Timestamp, Oil Temp, winding temp in 3 separate columns
code
<script>
window.onload = getddata();
function getddata() {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var Readings = JSON.parse(xmlhttp.responseText);
//jquery data table - start
$(document).ready(function () {
$('#example').DataTable({
columnDefs: [{
"targets": 1,
"render": function (data, type, row, meta) {
var hexvalue =base64toHEX(data);
var deviceid= hexToDec(hexvalue.substr(1,1));
var oil_temp= hexToDec(hexvalue.substr(2,2));
var winding_temp= hexToDec(hexvalue.substr(4,2));
return 'oil temp: ' + oil_temp + ', Winding Temp: ' + winding_temp + ' ;
}
},
{
"targets": 0,
"render": function (data, type, row, meta) {
var updDate= UtcToIst(data).toLocaleDateString();
var updTime= UtcToIst(data).toLocaleTimeString();
var updDateTime=updDate + ", " + updTime;
return updDateTime ;
}
}
}
],
data: Readings,
columns: [{
"data": "timestamp"
}, {
"data": "dataFrame"
}
]
});
});
//data table code -close
}
};
xmlhttp.open("GET", "https://.., true);
xmlhttp.setRequestHeader("Authorization", "Basic a2VybmV");
xmlhttp.setRequestHeader("Content-type", "Application/json");
xmlhttp.send();
}
</script>

It seems to me the code is a little bit overcomplicated. Why not just reuse dataFrame over multiple columns? Perhaps I misunderstand the question ...
var table = $('#example').DataTable({
data: sampleReadings,
columns: [
{ data: 'timestamp', title: 'timestamp',
render: function(data) {
return data
/* dont know what UtcToIst is
var updDate= UtcToIst(data).toLocaleDateString();
var updTime= UtcToIst(data).toLocaleTimeString();
var updDateTime=updDate + ", " + updTime;
return updDateTime ;
*/
}
},
{ data: 'dataFrame', title: 'deviceid',
render: function(data) {
var hexvalue = base64toHEX(data);
return hexToDec(hexvalue.substr(1,1));
}
},
{ data: 'dataFrame', title: 'Oil temp',
render: function(data) {
var hexvalue = base64toHEX(data);
return hexToDec(hexvalue.substr(2,2));
}
},
{ data: 'dataFrame', title: 'Winding temp',
render: function(data) {
var hexvalue = base64toHEX(data);
return hexToDec(hexvalue.substr(4,2));
}
},
//I guess there is more data hidden in dataFrame
//You can almost copy paste new columns here
]
})
If you have 10.000 records it would be a good idea to cache the output from base64toHEX.
demo -> http://jsfiddle.net/fn0yL361/

You can simply add a new column and render related value. Please update the data tables column.
https://datatables.net/reference/option/columns.name
{ columnDefs: [{
"targets": 2,
"name": "winding temp",
"render": function (data, type, row, meta) {
var hexvalue =base64toHEX(data);
var deviceid= hexToDec(hexvalue.substr(1,1));
var oil_temp= hexToDec(hexvalue.substr(2,2));
var winding_temp= hexToDec(hexvalue.substr(4,2));
return 'Winding Temp: ' + winding_temp ;
}
},{
"targets": 1,
"name": "Oil temp",
"render": function (data, type, row, meta) {
var hexvalue =base64toHEX(data);
var deviceid= hexToDec(hexvalue.substr(1,1));
var oil_temp= hexToDec(hexvalue.substr(2,2));
var winding_temp= hexToDec(hexvalue.substr(4,2));
return 'oil temp: ' + oil_temp ;
}
},
{
"targets": 0,
"name" : "Timestamp",
"render": function (data, type, row, meta) {
var updDate= UtcToIst(data).toLocaleDateString();
var updTime= UtcToIst(data).toLocaleTimeString();
var updDateTime=updDate + ", " + updTime;
return updDateTime ;
}
}
],
data: Readings,
columns: [{
"data": "timestamp"
}, {
"data": "dataFrame"
},
{
"data": "dataFrame"
}
]

Here is an example, because there are spaces in Name so need some extra code to get field:
var str = "{timestamp: 'xxx', dataFrame: 'Old Time: xx, winding Time: yyyy, Ambient Time: zzzz'}";
var objOrg = JSON.parse(str);
var newJSon = [{}];
foreach (var itm in objOrg)
{
var new3Fields = itm.dataFrame;
var arr = new3Fields.split(',')
var newItem = {};
newItem.timestamp = itm.timestamp;
newItem.OldTime = JSON.parse(arr[0]).['Old Time'];
newItem.WindingTime = JSON.parse(arr[1]).['winding Time'];
newItem.AmbientTime = JSON.parse(arr[2]).['Ambient Time'];
newJSon += newItem;
}
newJSon <--- This is a list with 4 columns

jQuery autocomplete suggests all options regardless of input entry

I have a jQuery script that will get a JSON response and create as many "player" objects as there are in the response.
It will then add to availablePlayers which I then use as the variable for the source: field of autocomplete
When a user selects a player name and clicks the "add" button it will, at the moment, just display the guid and name of a player.
However, no matter what letters I type, all the players are given as an option. To illustrate this, if I type "Z" and none of the players have Z in their name, they options are still displayed.
How can I refine this functionality?
HTML
<div class="player-widget">
<label for "players">Players</label>
<input id="player" />
<input id="playerGUID" hidden />
<button id="add">Add</button>
</div>
jQuery
$(document).ready(function(){
var availablePlayers = []; // BLANK ARRAY OF PLAYERS
$("#player").autocomplete({
source: availablePlayers,
response: function (event, ui) {
ui.content = $.map(ui.content, function(value, key) {
return {
label: value.name,
value: value.guid
}
});
},
focus: function(event, ui) {
$("#player").val(ui.item.label);
return false;
},
select: function (event, ui) {
$("#player").val(ui.item.label); // display the selected text
$("#playerGUID").val(ui.item.value); // save selected id to hidden input
return false;
}
});
$.getJSON("http://localhost/Websites/Player-Widgets/service.php", function(data) {
var feedHTML = '';
// LOOP THROUGH EACH PLAYER
$.each(data.players, function(i, player) {
// DEFINE VARIABLES - BASED ON PLAYER ATTRIBUTES
var guid = player.guid;
var name = player.name;
var dob = player.date_of_birth;
var birth = player.birthplace;
var height = player.height;
var weight = player.weight;
var position = player.position;
var honours = player.honours;
// CREATE NEW PLAYER (OBJECT)
var player = {
guid: guid,
name: name,
position: position
};
// ADD TO PLAYER TAG ARRAY
availablePlayers.push(player);
});
console.log("User friendly array");
$.each(availablePlayers, function(i, val) {
console.log(val.guid + " - " + val.name + " [" + val.position + "]");
});
console.log("Array printout");
console.log(JSON.stringify(availablePlayers));
}).done(function(){
console.log("Done! Success!");
$("#player").autocomplete("option", "source", availablePlayers);
});
$("#add").click(function() {
alert($("#playerGUID").val() + " - " + $("#player").val());
});
});
Sample JSON response
{
"players": [
{
"guid": "1",
"name": "Matias Aguero",
"date_of_birth": "1981-02-13",
"birthplace": "San Nicolas, Argentina",
"height": "1.83m (6' 0\")",
"weight": "109kg (17st 2lb)",
"position": "Prop",
"honours": "40 caps"
},
{
"guid": "2",
"name": "George Catchpole",
"date_of_birth": "1994-02-22",
"birthplace": "Norwich, England",
"height": "1.85em (6ft 1\")",
"weight": "104kg (16st 5lb)",
"position": "Centre",
"honours": ""
}
]
}

Your problem is in the source function.
Source function uses request to pass term param to query, and you are ignoring it.
If you're using availablePlayers to query, you should use
source: availablePlayers
and your current function to map {label, text} object in response parameter.
response: function (event, ui) {
ui.content = $.map(ui.content, function(value, key) {
return {
label: value.name,
value: value.guid
}
});
}

Construct JSON in proper format with Jquery

I am trying to reformat a dynamically created JSON output into a format that can be consumed by the x-editable select type source[]. I need help building the array so that the re-formated JSON output looks like this:
{value: 2, name: 'Maintenance'},
Below is a sample original JSON which I am consuming:
{"COLUMNS":["SECTIONCOMMONNAME"],"DATA":[["Aircraft Overview"],["Email Server Settings"],["Maintenance"],["Page Sections"],["WOW"]]}
The code I am using is:
$(document).ready(function () {
var myURL = 'https://api.myjson.com/bins/3nzdj';
var myarray = [];
$.ajax({
url: myURL,
dataType: 'json',
success: function (e) {
console.log('My created console output:' +'<br>');
$.each(e.DATA, function (i, jsonDataElem) {
console.log("{value: " + i + ', ' + "name: " + '"'+this+"'}");
var item = {
"value": i,
"name": this
};
myarray.push(item);
});
var newJson = JSON.stringify(myarray);
console.log('My stringify output:' +'<br>' +newJson);
}
});
$('.sectionsAvailable').editable({
name: 'template',
type: 'select',
placement: 'right',
send: 'always',
value: 1,
source: [], //newJson (my new var)
/* should be in this format:
source: [{
value: 1,
text: 'text1'
}, {
value: 2,
text: 'text2'
}]*/
});
};
});
After the stringify, the output is close, but wont work. It looks like this:
{"value":2,"name":["Maintenance"]}
and needs to look like thisL
{value:2,name:'Maintenance'},
Here is a JSfiddle showing the output here.

it seems you are assigning complete array instead of value at index 0 try this
var item = {
"value": i,
"name": this[0] // gives elemnt at index 0
};
myarray.push(item);
FIDDLE

I was able to answer my own question. There might be a better way, but this works:
var myURL = 'https://api.myjson.com/bins/3nzdj';
$.getJSON(myURL, function(data) {
var output = '';
$.each(data.DATA, function(key, val) {
output +='{value: ';
output += "'"+key+"'";
output +=',text:';
output += "'"+val+"'";
output +='}';
output +=',';
});
var outputAdapted = '['+output+']'
$('.sectionsAvailable').editable({
name: 'template',
type: 'select',
placement: 'right',
send: 'always',
value: 1,
// should be in this format:
source:
function() {
return outputAdapted;
},
});
});
My FIDDLE I hope this can help someone else.

How can I filter results in typeahead.js using a second variable?

I am trying to filter results using Typeahead.js. I can currently filter the results using a field called activity_title. This works fine.
How can I filter my results by a second value? In this case, I would like to select only the results that have a certain value for activity_level. I need to set this when the typeahead is initialised rather than hard coding it into the Bloodhound initialisation (e.g. I don't want to use url: 'api/activity/&range=1,3')
I have the following valid JSON that I access remotely:
{
"meta": [
{
"name": "activity_id",
"table": "table",
"max_length": 4
},
{
"name": "activity_title",
"table": "table",
"max_length": 91
},
{
"name": "activity_level",
"table": "table",
"max_length": 2
}
],
"detail": [
{
"activity_id": "57",
"activity_title": "Help old ladies to cross the road.",
"activity_level": "2"
},
{
"activity_id": "58",
"activity_title": "Help mum with the washing up.",
"activity_level": "3"
},
{
"activity_id": "59",
"activity_title": "Shine my shoes",
"activity_level": "1"
},
{
"activity_id": "60",
"activity_title": "Put the bins out",
"activity_level": "1"
}
]
}
I set up a Bloodhound instance like this:
var activities = new Bloodhound({
datumTokenizer: function (datum) {
return Bloodhound.tokenizers.whitespace(datum.activity_title);
},
queryTokenizer: Bloodhound.tokenizers.whitespace,
prefetch: {
url: '/api/activity/',
filter: function(data) {
return $.map(data['detail'], function(detail) {
return {
activity_id: detail.activity_id,
activity_title: detail.activity_title,
objective_level: detail.objective_level
};
});
}
}
});
I use Typeahead.js to do a lookup on the data as I type.
$( document ).on( "focus", ".typeahead-init", function() {
// + '&range=' + minimum + ',' + maximum
var minimum = $('#group-level-min-1').val();
var maximum = $('#group-level-max-1').val();
$(this).typeahead({
highlight: true
},
{
name: 'activity_title',
displayKey: 'activity',
source: activities.ttAdapter(),
templates: {
header: '<div class="header-name">Activities</div>',
empty: [
'<div class="empty-message">',
'No activities match your search',
'</div>'
].join('\n'),
suggestion: Handlebars.compile('<div class="typeahead-activity" id="typeahead-activity-{{activity_id}}"><strong>{{objective_level}}</strong> - {{activity_title}}</div>')
}
})
//info on binding selection at https://github.com/twitter/typeahead.js/issues/300
.bind('typeahead:selected', function(obj, datum, name) {
var target = $(this).closest('.activity-container');
var activityId = datum['activity_id'];
var url = '/api/activity/id/'+activityId;
$(target).children('.activity-id').val(activityId);
//http://runnable.com/UllA9u8MD5wiAACj/how-to-combine-json-with-handlebars-js-for-javascript-ajax-and-jquery
var raw_template = $('#activity-output').html();
// Compile that into an handlebars template
var template = Handlebars.compile(raw_template);
// Fetch all data from server in JSON
$.get(url,function(data,status,xhr){
$.each(data,function(index,element){
// Generate the HTML for each post
var html = template(element);
// Render the posts into the page
target.append(html);
});
});
});
$(this).removeClass("typeahead-init");
$(this).focus();
});
This has been cobbled together from several answers on Stackoverflow and others. Any help greatly appreciated.

Select2.js: why is id the same as text on change for removed?

JSfiddle: http://jsfiddle.net/cjVSj/
I have a simple select2 with the range of possible tags set by the tags option and the preloaded tags set by values in the input field in the html.
When the on change event fires on the select2, the removed item seems to lose its id, reporting instead its text value.
To see the problem, adding a tag (e.g. west) correctly reports the added.id, but removing the existing east tags reports id = east, not 1356.
Any insight into how to gain access to the id of a tag upon removal?
HTML:
<script>
var tags = [{ "id": 1354, "text": "north", "restricted": false
}, {"id": 1355, "text": "south", "restricted": false
}, {"id": 1356, "text": "east", "restricted": false
}, {"id": 1357, "text": "west", "restricted": false
}];
</script>tags:
<input type="text" id="mytags" value="east" />
JS:
$(document).ready(function () {
$('#mytags').select2({
placeholder: 'Search',
allowClear: true,
minimumInputLength: 2,
multiple: true,
tags: tags,
tokenSeparators: [','],
});
$('#mytags').on("change", function (e) {
console.log("change " + JSON.stringify({
val: e.val,
added: e.added,
removed: e.removed
}));
if (e.added) {
alert('added: ' + e.added.text + ' id ' + e.added.id)
} else if (e.removed) {
alert('removed: ' + e.removed.text + ' id ' + e.removed.id)
}
});
});

There was an issue with your select2 declaration and syntax.
Further more, if you entered any other text, say "eas" or "test", your piece of code reflected that as it is. Check this scenario.
Updated fiddle: http://jsfiddle.net/ZBf5H/
To be specific, you did not give appropriate mapping to your tags. Please find how to access remote data in select 2 from here
The change of code is as below:
$(document).ready(function() {
var data=[{id:1354,text:'north',restricted:false},
{id:1356,text:'east',restricted:false},
{id:1357,text:'west',restricted:false},
{id:1355,text:'south',restricted:false}];
function format(item)
{ return item.text; }
$('#mytags').select2({
placeholder: 'Search',
allowClear: true,
minimumInputLength: 2,
multiple: true,
tags: tags,
tokenSeparators: [','],
data:{ results: data, text: 'text' },
formatSelection: format,
formatResult: format
});
Let me know if this works for you.

Ok... I've got a working solution, but I still don't exactly understand the difference between select2's tags and data options....
JSfiddle: http://jsfiddle.net/7e8Pa/
I'm initializing select2 with a list of all possible tags via the data option from an array, then selecting those for preloading: the initSelection function checks for ids in the and looks them up in the data array (the pre-stored one, not Select2's). Last, new tags may be added (the createSearchChoice does this). To hook this to my server, I'm just going to insert ajax calls where noted below in the on-change event handler (which gets called after createSearchChoice, and can overwrite the field values for the new object set in createSearchChoice).
JS:
function findWithAttr(array, attr, value) {
for (var i = 0; i < array.length; i += 1) {
if (array[i][attr] == value) {
return array[i];
}
}
}
$(document).ready(function () {
function format(item) {
return item.text;
}
$('#mytags').select2({
placeholder: 'Search',
minimumInputLength: 2,
multiple: true,
//tags: tags,
tokenSeparators: [','],
data: {
results: tags,
text: 'text'
},
initSelection: function (element, callback) {
var data = [];
$($('#mytags').val().split(",")).each(function (i) {
var o = findWithAttr(tags, 'id', this);
if (o) {
data.push({
id: o.id,
text: o.text
});
} else {
console.log("findWithAttr returned none; likely invalid id");
}
});
console.log("data = " + JSON.stringify(data));
callback(data);
},
createSearchChoice: function (term, data) {
console.log("create");
if ($(data).filter(function () {
return this.text.localeCompare(term) === 0;
}).length === 0) {
// call $.post() to add this term to the server, receive back id
// return {id:id, text:term}
// or detect this shiftiness and do it below in the on-change
return {
id: -1,
text: term
};
}
},
formatSelection: format,
formatResult: format
});
$('#mytags').on("change", function (e) {
console.log("change " + JSON.stringify({
val: e.val,
added: e.added,
removed: e.removed
}));
if (e.added) {
alert('added: ' + e.added.text + ' id ' + e.added.id);
//modifying the id here overrides what is assigned above in createSelection
e.added.id = 5;
} else if (e.removed) {
alert('removed: ' + e.removed.text + ' id ' + e.removed.id);
}
var selections = (JSON.stringify($('#mytags').select2('data')));
$('#selectedText').text(selections);
});
});
HTML:
<script>
var tags = [{
"id": 1354,
"text": "north",
"restricted": false
}, {
"id": 1355,
"text": "south",
"restricted": false
}, {
"id": 1356,
"text": "east",
"restricted": false
}, {
"id": 1357,
"text": "west",
"restricted": false
}];
</script>
<p>tags:
<input type="text" id="mytags" value="1355" style="width:80%" />
</p>
<p>Selected Options: <span id="selectedText"></span>
</p>
<p>Debug: <span id="debug"></span>
</p>