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I am trying to update a map value in my Firestore db with a Cloud Functions trigger [duplicate]

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Increment counter with Cloud Functions for Firebase
(3 answers)
Closed 3 years ago.
I am trying to update my map value with set function on a document but can't figure out how to update a specific map value.
In my firestore db there is a field called 'stats' and it is a map, inside of stats there is a key:value (likes_count: total), I want to update the total value for likes_count on my document, looks something like this:
stats: {
likes_count: 8
}
I want to update that value in the map with a cloud function trigger.
With regular fields I can easily set the value but not sure how to update a specific value in a map but here is my code for the function:
exports.userReceivedLikeTrigger = functions.firestore
.document(ENVIRONMENT_PATH + 'user_likes/{userLikeId}')
.onCreate((change, context) => {
const data = change.data();
return database.doc(ENVIRONMENT_PATH + "users/" + data.postOwnerRef)
.get()
.then(snapshot => {
if (snapshot.exists) {
let count = snapshot.data().stats.receivedLikes;
if (!count) {
count = 0;
}
// Then return a promise of a set operation to update the count
return database.doc(snapshot.ref.path).set({
// BREAKS HERE with stats.likesCount
stats.likesCount: count + 1
}, , {merge: true});
} else {
console.log("User is null");
return null
}
});
});

What is the error log?
Its a theory but with .set() its trying to make a new document (idk how merge:true works on this), but it can't make a value for stats.likesCount if there is no field stats already.
You can try to change .set() to .update() operation, it will do.
But its also not recommended to increment value with such a way. You better use
return db.doc(${path}).update({
stats.likesCount: admin.firestore.FieldValue.increment(1)
});
Because if there are multiple functions triggered, it can fail easily write incorrent data in likesCount field, but FieldValue.increment(1) works as a transaction so its safe to use in this case.

Check if variable exist or not

I'm using API Jira
I'm doing some functions but before to use function, I need to verified if a value exist or not
If he exists so I can launch functions else do nothing.
I'm doing this :
// Call the file functions.js
var functions = require('./functions.js')
/*
Function getAllIssueForSCII displays all the issues in the form of a JSON and that browses all the keys that are in the SCII project
Function pushInitialization initializes the computer score card to 80 on Jira
*/
functions.getAllIssueForSCII().then(function(json){
for (let i=0; i<json.issues.length;i++){
if(json.issues[i].fields.customfield_14038 = null){ // i'm doing this
console.log(json.issues[i].key);
functions.pushInitialization(json.issues[i].key);
}
}
});
/*
A delay is added so that Jira can correctly recover the value 80.
Thanks to this value, we can do all the calculation (Function calculate)
Function pushComputerScoreCard push the final value into the computer score card.
Function generateJSON generates a JSON.
Function replaceCharacter solve the problem of array inside the JSON
*/
setTimeout(function() {
functions.getAllIssueForSCII().then(function(json){
for (let i=0; i<json.issues.length;i++){
functions.calculate(json.issues[i]);
functions.pushComputerScoreCard(json.issues[i].key);
functions.generateJSON(json.issues[i].key);
functions.replaceCharacter();
}
});
}, 1000)
My problem: After the settimeout, he recover value already exist and do the calcul...
I need to verified my condition in all of the script .
Thanks for your help

You are assigning null value in an if condition:
if(json.issues[i].fields.customfield_14038 = null){ // i'm doing this
You need to compare values:
if(json.issues[i].fields.customfield_14038 === null){ // You need to do this:

How to make this run only once?

I'm trying to get it where If someone clicks the button it will update the database but what happens if I enter 50 then it will keep running it and I have a tracking board that sums everything up so it overloads my server and makes the total in the 1000's when its normally just over 100.
I've tried a document ready function, I've had on and one. ('click') and it keeps running multiple times
$('#update_new_used-counter').one('click', function (event) {
event.preventDefault();
let updated_new_counter = $('#new_sold-update').val().trim();
let updated_used_counter = $('#used_sold-update').val().trim();
trackingBoardRef.on("value", function(snapshot) {
let current_new_counter = snapshot.val().new;
let current_used_counter = snapshot.val().used;
if (updated_new_counter == '') {
trackingBoardRef.update({
new: current_new_counter,
});
} else {
trackingBoardRef.update({
new: updated_new_counter,
})
};
if (updated_used_counter == '') {
trackingBoardRef.update({
used: current_used_counter,
});
} else {
trackingBoardRef.update({
used: updated_used_counter,
})
};
console.log(snapshot.val().new);
console.log(snapshot.val().used);
});
});
That's what I have now and it just keeps running multiple times until firebase says I had to many requests and stops it. I just want it to update once

When you call:
trackingBoardRef.on("value", function(snapshot) {
You attach a listener to the data in trackingBoardRef that will be triggered right away with the current value, and then subsequently whenever the data under trackingBoardRef changes. And since you're changing data under trackingBoardRef in your code, you're creating an infinite loop.
If you only want to read the data once, you can use the aptly named once method:
trackingBoardRef.once("value", function(snapshot) {
...
Note that if you're update the value under trackingBoardRef based on its current value, you really should use a transaction to prevent users overwriting each other's changes.

firebase - handle no data from snapshot

I have a firebase reference, where I pull data down for a specific custom index I created.
requestsRef
.orderByChild('systemgameindex')
.startAt(lastrequest.systemgameindex.toString())
.endAt(lastrequest.systemgameindex.toString() + '~')
.limitToFirst(customElem.dataops.limit + 1)
.on('child_added', function (snapshot) {
var request = snapshot.val() || {};
request.key = snapshot.key();
request.systemColor = customElem.getSystemColor(request.system);
request.description = customElem.truncateText(request.description, 65);
customElem.getUserProfile(request);
customElem.getCommentCount(request.key);
if (request.systemgameindex !== lastrequest.systemgameindex) { customElem.push('requests', request); };
customElem.removeSpinnerRoo();
});
Right before I make the call to firebase, I have a custom spinner I dislay with a function called addSpinnerRoo(), and when data is returned, I make a call to removeSpinnerRoo() to hide the spinner on the DOM.
It works beautifully when there's data to return from firebase, but if the firebase query brings back no results, the callback on child_added never gets fired, so I have a spinner still spinning on the DOM.
Is there a way to handle when there's no data returned within Firebase?
Any insight would be appreciated a lot. Thanks

After reading this from the documentation from here:
The callback function receives a DataSnapshot, which is a snapshot of the data. A snapshot is a picture of the data at a particular database reference at a single point in time. Calling val() on a snapshot returns the JavaScript object representation of the data. If no data exists at the reference's location, the snapshots value will be null.
I was able to do use "val" instead of "child_added" to actually have firebase still fire the callback for the ".on()" method. So my code now looks like this:
var data = snapshot.val();
if (data !== null && data !== undefined) {
var requests = _.map(data, function (val, key) {
val.key = key;
return val;
});
_.each(requests, function (request) {
request.systemColor = customElem.getSystemColor(request.system);
request.description = customElem.truncateText(request.description, 65);
customElem.getUserProfile(request);
customElem.getCommentCount(request.key);
customElem.push('requests', request);
});
}
customElem.removeSpinnerRoo();
And with that, I was able to get what I needed. If this helps anyone, great...

Cant get the current id of a data from local Storage using jquery

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.