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Getting json fields from json file

I am facing a problem. I have this json log
{
"log": "Log Info : { \"datetime\" : \"datetime\", \"field1\" : \"value1\", \"field2\" : \"value2\", \"field3\" : \"value3\", \"field4\" : \"value4\", \"field5\" : \"value5\", \"field6\" : \"value6\", \"field7\" : \"value7\", \"field8\" : \"value8\", \"field9\" : \"value9\", \"field10\" : \"value10\", \"field11\" : \"value11\"}\n",
"stream": "stdout",
"kubernetes": {
"pod_name": "pod_name",
"namespace_name": "namespace_name",
"pod_id": "pod_id",
"host": "host",
"container_name": "container_name",
"docker_id": "docker_id",
"container_hash": "container_hash",
"container_image": "container_image"
}
}
I need to get all field inside "log" key. These fields will be increased, so I need to get all fields inside log dynamically. I am using this code to parse json, but the output is this. Maybe someone can help me? Thanks.
const readFile = require("fs").readFile;
readFile("log.json", (err, data) => {
if (err) throw err;
const log = JSON.parse(data);
console.log(log);
});
Output:
{
log: 'Log Info : { "datetime" : "datetime", "field1" : "value1", "
field2" : "value2", "field3" : "value3", "field4" : "value4", "field5" :
"value5", "field6" : "value6", "field7" : "value7", "field8" : "value8"
, "field9" : "value9", "field10" : "value10", "field11" : "value11"}\n',
stream: 'stdout',
kubernetes: {
pod_name: 'pod_name',
namespace_name: 'namespace_name',
pod_id: 'pod_id',
host: 'host',
container_name: 'container_name',
docker_id: 'docker_id',
container_hash: 'container_hash',
container_image: 'container_image'
}
}

You need to JSON.parse also the "inner" json (after you clean it from the prefix)
var obj = {
"log": "Log Info : { \"datetime\" : \"datetime\", \"field1\" : \"value1\", \"field2\" : \"value2\", \"field3\" : \"value3\", \"field4\" : \"value4\", \"field5\" : \"value5\", \"field6\" : \"value6\", \"field7\" : \"value7\", \"field8\" : \"value8\", \"field9\" : \"value9\", \"field10\" : \"value10\", \"field11\" : \"value11\"}\n",
"stream": "stdout",
"kubernetes": {
"pod_name": "pod_name",
"namespace_name": "namespace_name",
"pod_id": "pod_id",
"host": "host",
"container_name": "container_name",
"docker_id": "docker_id",
"container_hash": "container_hash",
"container_image": "container_image"
}
}
var str = (obj.log).substring(obj.log.indexOf(':') + 1);
//console.log(str)
var result = JSON.parse(str);
console.log(result)

Query for sorting a date that is inside another object in firebase

I'm developing a chat in angularjs where I have a chat list view and a chat view.
What I'm trying to do is sorting my chat list to show the most recent chat on top using Firebase and JS, I did my research but all of the questions I found they have the date directly as a child but inside my DB my date is inside a 'lastMessage' key. My dates are the following format.
date: 1528417493034
Any help would be highly appreciated
My structure is the following:
"Users": {
"nCsXbTl8CcXvoviuL5Tt7kiV6Bn1" : {
"contacts" : {
"VN9AFnn4uXgDfoir8DWHnw54zrJ3" : {
"email" : "test#test.com",
"lastMessage" : {
"date" : 1528417493034,
"senderId" : "VN9AFnn4uXgDfoir8DWHnw54zrJ3",
"status" : "success",
"text" : "Yes?",
"type" : "text",
"uid" : "1528417493034VN9AFnn4uXgDfoir8DWHnw54zrJ3"
},
"name" : "test"
},
"cHuR26YaSgbO7ahSVLg1XG5HYer2" : {
"email" : "aaa#aaa.com",
"lastMessage" : {
"date" : 1528417068249,
"senderId" : "cHuR26YaSgbO7ahSVLg1XG5HYer2",
"status" : "success",
"text" : "Trigeeeers?",
"type" : "text",
"uid" : "1528417068249cHuR26YaSgbO7ahSVLg1XG5HYer2"
},
"name" : "aaa"
}
}
}
My chat list view is the following:
<div layout="row" class="main-chat-container" layout-wrap>
<div class="list-container" flex="30">
<div class="chat-header">
<p>Lista de Chats</p>
</div>
<div class="chats-list">
<div class="chats-header">
<p>Usuarios</p>
</div>
<div class="chats" ng-repeat="chat in chats">
<div class="email-container" ng-click="setUserData(chat)" ng-class="styleData.email == chat.email ? 'new-background' : ''">
<a>{{chat.email}}</a> <p ng-show="counter > 1">{{testData.number}}</p>
</div>
</div>
</div>
</div>
<div class-"chat-container" flex="70">
<ui-view></ui-view>
</div>
And the controller is the following
app.controller('chatController', function (currentAuth, $scope, $firebaseArray, $firebaseObject) {
$scope.chats = [];
$scope.getContactsList = function(){
var listRef = firebase.database().ref('Users').child(currentAuth.uid).child('contacts');
var test = firebase.database().ref('Users').child(currentAuth.uid).child('contacts');
var listArray = $firebaseArray(listRef);
var testArray = $firebaseArray(test);
$scope.chats = listArray;
console.log("TEST ARRAY IS ");
console.log(testArray);
}
$scope.getContactsList();
});

To so a users contacts on the timestamp of their last message, you'd do something like this:
var userRef = firebase.database().ref('Users').child(currentAuth.uid)
var contactsQuery = userRef.child('contacts').orderByChild("lastMessage/date");
Note that this will give you the contacts in chronological order, so you will have to reverse the result in your client.
Alternatively some folks keep an inverted value in a separate property in their database, e.g.
"VN9AFnn4uXgDfoir8DWHnw54zrJ3" : {
"email" : "test#test.com",
"lastMessage" : {
"date" : 1528417493034,
"invertedDate" : -1528417493034,
"senderId" : "VN9AFnn4uXgDfoir8DWHnw54zrJ3",
Since this invertedDate value is inverted, ordering on that property would give you the contacts in reverse chronological order, so that you don't have to reverse them in the client.

Return value from firebase database Javascript

My attempts at retrieving the value of a firebase record are failing. My JSON is as follows:
{
"accounts" : {
"-KRPSyO4B48IpBnHBTYg" : {
"dateCreated" : "",
"email" : "",
"provider" : "",
"userId" : ""
}
},
"products" : {
"-KUKRafaNurpFhGF4jQa" : {
"name" : ""
}
},
"total" : 1
}
I'm trying to return the value of "total". Here's the latest attampt:
var totals = firebase.database().ref('total').once('value', function(products) {});
$scope.totalPosts = totals;
and my HTML:
<div class="card" ng-controller="myController">{{totalPosts}}</div>
All I'm getting is an empty {}. What am I doing wrong?
Thanks in advance!

Firebase queries are asynchronous, try this.
firebase.database().ref('total').once('value', function(products) {
$scope.totalPosts = products.val();
});
Read and write Data

jQuery Datatables TypeError: aData is undefined

I have a jQuery datatable that uses an Ajax data source. The table is defined as follows:
$("#tblNotes").DataTable({
"ajax" : {
"url": "/projects/ajaxGetProjectNotes/",
"type" : "post",
"dataType" : "json",
"data" : {"idProject" : "b92792db-9ea6-49bf-b4dc-1cdf3f441148"}
},
"columns" :
[
{"data" : "dComment", "width" : "130px", "orderable" : true},
{"data" : "cComment", "width" : "270px", "orderable" : false}
]
});
The ajax response from the php script is:
[{"dComment":"","cComment":""}]
I am getting an error:
TypeError: aData is undefined
for ( i=0 ; i<aData.length ; i++ ) {
-------------^
The error is coming from datatables.js (line 15748, col 18).
Here's the source of the ajax source (and the accompanying model function that retrieves the data). Note that this is codeigniter based code (but I don't think that will make much of a difference):
function ajaxGetProjectNotes(){
$id = $_POST["idProject"];
$notes = $this->projects_model->getNotes($id);
if(!isset($notes[0]["cComment"])){
$notes[0]["dComment"]="";
$notes[0]["cComment"]="";
}
echo json_encode($notes);
}
The model code:
function getNotes($idProject){
$this->db->select("*")
->from("projectnotes")
->where("idProject", $idProject);
$query = $this->db->get();
$aResult = $query->result_array();
return $aResult;
}
The error is occuring when the page loads.
Any assistance would be appreciated...

no database content is showing (Meteor, AngularJS, mongodb)

i created a "todolist" with angular-meteor (meteor add urigo:angular).
This are the files which are involved:
config.js (ui-router file)
.state('app.todolist', {
url: '/todolist',
title: 'Todolist',
controller: 'TodoListController',
controllerAs: 'tc',
templateUrl: helper.basepath('todolist.ng.html'),
authenticate: true
})
todolist.ng.html (static file)
<h3>Todo - List
<small>Example app of a todo list.</small>
</h3>
<ul ng-repeat="task in tc.tasks">
<li>{{task.text}}</li>
</ul>
todolist.js (Controller)
angular.module('angle').controller('TodoListController',
['$scope', '$meteor',
function($scope, $meteor){
var vm = this;
vm.tasks = $meteor.collection(Tasks);
}]
);
the "tasks" collection is loaded in the "lib" folder and has documents inserted
meteor:PRIMARY> db.tasks.find()
{ "_id" : ObjectId("55bf7d98251a0c51417732bf"), "text" : "zweiter eintrag", "createdAt" : ISODate("2015-08-03T14:41:28.534Z") }
{ "_id" : ObjectId("55bf7dab251a0c51417732c0"), "text" : "zweiter eintrag", "createdAt" : ISODate("2015-08-03T14:41:47.045Z") }
{ "_id" : ObjectId("55bf7dac251a0c51417732c1"), "text" : "zweiter eintrag", "createdAt" : ISODate("2015-08-03T14:41:48.685Z") }
{ "_id" : ObjectId("55bf7dad251a0c51417732c2"), "text" : "zweiter eintrag", "createdAt" : ISODate("2015-08-03T14:41:49.003Z") }
{ "_id" : ObjectId("55bf7dad251a0c51417732c3"), "text" : "zweiter eintrag", "createdAt" : ISODate("2015-08-03T14:41:49.261Z") }
lib/js/databases.js
Tasks = new Mongo.Collection('tasks');
But when I run my app and click on the "Todolist" I can't see anything. It doesnt list any task.text... If I use a static array instead of mongodb everything works fine. (for example: vm.tasks = [{ text: "Task1" },{ text: "task2" }]; ).
But with mongodb noting is showing. I checked the database connection, this works. I dont get any errors, when loading the app and accessing the "Todolist".
Any ideas?
Regards,
Simon

Ok problem is solved.
I created the databases.js in the "myapp/client/lib" folder instead of the pure "myapp/lib" folder.
bad mistake... but its solved :) Thanks for help!