I'm trying to allow non-signed in users the ability to add items to a basket.
When the button is clicked the code below is run.
By default the basket value doesn't exist, so the if statement should create a value.
The else statement will add 1 to existing value.
This seems to cause an infinite loop and the number in the database jumps to 1016.
I've probably approached this in the wrong way and can't see how to stop this.
function addToBasket(sessionID){
firebase.database().ref('tempUser/' + sessionID).on('value', function (snapshot) {
var data = snapshot.val();
if (data == null) {
//update
firebase.database().ref('tempUser/' + sessionID).set({
basket: 1,
});
}
else {
//get basket number
var currentBasket = Object.values(data);
//turn string into a integer
let number = parseFloat(currentBasket) ;
//add one to the value
var newNumber = number + 1;
//upload new number to db
firebase.database().ref('tempUser/' + sessionID).set({
basket: newNumber,
});
}
});
}
Thank you in advance for any help or advice,
Connor
You're attaching a permanent listener to tempUser/$sessionID in your database. This means that Firebase immediately calls your callback method with the current value in the database, and then calls the same callback each time the value changes.
Since inside this call, you are changing the data with tempUser/$sessionID, that triggers the same callback again. Which then makes another change to tempUser/$sessionID, which triggers the callback again. And again, and again...
If you only want to change the value once, use once() instead of on():
firebase.database().ref('tempUser/' + sessionID).once('value', ...
To explain the question. I have a dojo toolkit code which polls an open-monica server every 1 second to display the value on screen. I am trying to make an alarm which checks the values every 40 and 60 seconds. Therefore I am wondering if there is a function which can run alongside the passive polling of the dojo toolkit. I have tried setInterval() and setTimeout() however both of those stops the polling of the monica server
My code is:
require(["dojo/dom-attr", "atnf/monica", "dojo/domReady!"], function(domAttr, monica) {
function valCheck(){
}
// The callback is called separately for each point
// that has new data, so we only need to accept the reference to that
// point as an argument.
var pageUpdate = function(pointReference) {
var values = pointReference.latestValue(); //obtain the updated values
domAttr.set("htmlPageDiv", "innerHTML", values.value); //display the moniva value in their corresponding div in the html page
}
};
// We set up the connection to the MoniCA server.
var monicaServer = monica.server({
'webserverName': "some server",
'serverName': "serverName",
"webserverPath": "webServerPath",
'updateInterval': 1000, // in ms
'autoDescriptions': true
});
// Connect to it now, and when that is done, tell it which
// points we want to query.
monicaServer.connect().then(function(serverObj) {
//add monica points to check in the server
var points = monicaServer.addPoints(["some data point", "another data point", "etc."]);
// Tell the server connector which function to call on each
// update, for each point (we use the same callback for each.
for (var i = 0; i < points.length; i++) {
points[i].addCallback(pageUpdate);
}
// Get the descriptions and then start updating.
monicaServer.getDescriptions();
monicaServer.startUpdating();
});
});
After the user validate an order, the status of the order is set so validated and it is sent to another system X, the problem is that the plugin is fired twiced in some cases even more than twice and that lead to sending this entity multiple time to the system X. I tried to correct that by using the context.depth, but all the time is equal to 1.
JS Method:
Validate: function () {
Xrm.Page.getAttribute("eoz_validated").setValue(true);
Xrm.Page.data.entity.save();
ABE.Order.HideVisibleField();
Xrm.Page.ui.clearFormNotification('ProductError');
}
}
Plugin Execute method:
protected void ExecutePostOrderUpdate(LocalPluginContext localContext)
{
if (localContext == null)
{
throw new ArgumentNullException("localContext");
}
if (localContext.PluginExecutionContext.Depth > 1)
{
return;
}
tracingService = localContext.TracingService;
var order = (Entity)localContext.PluginExecutionContext.InputParameters["Target"];
bool isValidated = order.GetAttributeValue<OptionSetValue>("abe_isValidated").Value : false;
if (isValidated )
{
SendToSystemX(localContext.OrganizationService, order.Id);
SendProductsToOwner(localContext.OrganizationService, order.Id);
}
var statecode = order.Contains("statecode") ? order.GetAttributeValue<OptionSetValue>("statecode").Value : -1;
}
If your plugin is registered to trigger on update of "eoz_validated" and also updates "eoz_validated" then you can have an infinite execution loop.
To avoid this, before updating your context entity, reinstantiate it:
var updatedEntity = new Entity { LogicalName = context.LogicalName, Id = context.Id };
This removes all attributes that would otherwise have been updated such as "eoz_validated" which is contained within the context entity. Note that in your code you store the context entity within a variable called order.
I'm just guessing here (and don't have 50 reputation to ask a question). If this is happening in your code then presumably it's within SendToSystemX(IOrganizationService, Guid) or SendProductsToOwner(IOrganizationService, Guid).
I am building an Angular App with Firebase.
My intention is to create an object (say Rooms) at the root with 3 child objects (say Room1, Room2 & Room3) . Also, I am trying to create a logic that would check if the Rooms object is there - it wont create it again.
My code was :
var ref = new Firebase(firebaseURL);
ref.child('Rooms').once('value', function (snapshot){
if(snapshot.numChildren() == 0){
// Create Room within a loop
ref.child('Rooms').child(i).set(roomObj);
}else if(snapshot.numChildren() > 0){
// do not create
}
}
But when the code runs - it always enters into the if block !! And creates the child Rooms.
What is my mistake in the code ??
Most likely the value event will be triggered again with the value you expect.
Your solution is to run the code in a transaction.
var ref = new Firebase(firebaseURL);
ref.child('Rooms').transaction(function (data){
if(!data){
var rooms = {};
for (var roomNum=0; roomNum < 3; roomNum++) {
rooms['room'+roomNum] = { name: 'Room '+roomNum };
}
return rooms
}
}
So if the rooms don't exist yet, the above code creates them. If they already exist, the code does nothing (not returning a value, leaves the data unmodified).
Be sure to read the Firebase documentation for transaction.
I am working on an app to store data offline. My problem is when I try to retrieve the data from local storage for update/edit, it keeps calling only the id of the first item, and not calling the id of the data in view.
Please what am I doing wrong?
Here is my code for loading employees:
// load cases from localStorage
var employees;
if (localStorage.getItem('employees')) {
employees = JSON.parse(localStorage.getItem('employees'));
} else {
// If no cases, create and save them
employees = [];
// offling storing of our cases
localStorage.setItem('employees', JSON.stringify(employees));
}
// show case listing in list view page
var showEmployees = function () {
//erase existing content
$('#employee_list').html('');
//insert each employee
for (var i = 0; i<employees.length; i++) {
addEmployees(employees[i]);
}
};
Here is my code to add an employee to list view:
//add an eliment to list view
var addEmployees = function (empData) {
//HTML content of one list element
var listElementHTML = '<li><a class="employee_list" ui-btn ui-btn-e ui-btn-icon-right ui-icon-carat-r" data-transition="fade" data-split-icon="delete" href="#item'+empData.id+'">' + empData.employeename + '<br> ' + empData.dateofbirth + '</br></a></li>';
//appending the HTML code to list view
$('#employee_list').append(listElementHTML);
};
Here is my code for Edit function:
//User input to edit form
$('#edit_employee_page').on('click' , function () {
var editEmployee = JSON.stringify({
id: employees.length+1,
employeeno: $('#employeeno').val(),
employeename:$('#employeename').val(),
stateoforigine:$('#stateoforigine').val(),
employeephone: $('#employeephone').val(),
dateofbirth:$('#dateofbirth').val()
});
//Alter the slected data
localStorage.setItem("employees", JSON.stringify(employees));
return true;
});
for (var i in employees) {
var id = JSON.parse(localStorage.getItem(employees[i]));
}
Here is my code for the Edit button:
//register Edit button
$('.edit_button').live('click', function (e) {
alert('I was Cliked!');
e.stopPropagation();
$.each(employees, function(a, b) {
//if(b.id == employees[i]){
$('#id').val(b.id);
$('#employeeno').val(b.employeeno);
$('#employeename').val(b.employeename);
$("#stateoforigine").val(i.stateoforigine);
$('#employeephone').val(b.employeephone);
$('#dateofbirth').val(b.dateofbirth);
$("#id").attr("readonly","readonly");
$('#employeeno').focus();
$.mobile.changePage('#edit_employee_page');
return false;
//}
});
});
Here is my local Storage:
[
{"id":1,
"employeeno":"DEF/234/20014",
"employeename":"Bill Gates",
"stateoforigine":"Osun",
"employeephone":"080765432",
"dateofbirth":"12/11/1965"},
{"id":2,
"employeeno":"DEF/234/20014",
"employeename":"Bill Gates",
"stateoforigine":"Osun",
"employeephone":"080765432",
"dateofbirth":"12/11/1966"},
{"id":3,
"employeeno":"DEF/234/20014",
"employeename":"Bill Gates",
"stateoforigine":"Osun",
"employeephone":"080765432",
"dateofbirth":"12/11/1966"},
{"id":4,
"employeeno":"DAST/003/2003",
"employeename":"Gold Base",
"stateoforigine":"",
"employeephone":"",
"dateofbirth":"12/03/1986"}
]
Thanks for helping me out
The way you are storing your employees into localStorage is correct, but the way you are getting them out is incorrect. You stored your employees by stating:
localStorage.setItem("employees", JSON.stringify(employees));
So, in order to retrieve them, you must use:
var employees = JSON.parse(localStorage.getItem("employees"));
You see, you stored the data as a string with a key of "employees"; therefore, you can only retrieve it by that key. Since all data stored in localStorage is saved as a string, you must use JSON.parse() to convert the data back into an object - an array in this case. Then you can iterate over your employees.
Update:
You should be running this code as soon as the page is rendered (see below). I'm not sure how you're doing that - if you're using an IIFE or jQuery's document.ready() function. I don't think it's necessary to store an empty array into localStorage if none were loaded initially, so, I took your else clause out.
var employees = [];
if (localStorage.getItem('employees') !== null) {
employees = JSON.parse(localStorage.getItem('employees'));
}
Debug this line-by-line when it runs and make positive your employees variable contains data. If it doesn't contain data, well then, there's nothing to edit.
If, however, there is data, then execute your showEmployees() function. Oddly, I'm not seeing in your code where you actually call this. Is it bound to a button or action in your UI? Also, what is that for loop doing after your $('#edit_employee_page') click event function? It's trying to read data from localStorage improperly and it does nothing.
I think if you simply stepped through your code one line at a time using breakpoints and desk-checking your inputs/outputs you'd find out where you're going wrong.
It also appears that there's a disconnect in your code. May be you left out some lines; you define a string editEmployee but out of the blues you store JSON.stringify(employees) whereas employees is not defined in your code:
$('#edit_employee_page').on('click' , function(){
var editEmployee = JSON.stringify({
id: employees.length+1,
//........
});
//Alter the slected data
localStorage.setItem("employees", JSON.stringify(employees));
return true;
});
I had a similar task to do . I did it this way.
I passed the dynamic Id to be passed as an id attribute
id="'+empData.id+'"
and then inside the
$('.edit_button').live('click', function (e) {
alert('I was Cliked!');
var empId=$(this).attr('id');
rest of the code is same.