I'm using javascript to upload data from webduino, but have trouble with the formatting part.
The part my js pushes data to Firebase is as follows:
myFirebase.push({
messages:{
time:get_time("hms"),
d
}
});
The results in Firebase look like this:
However, to make the database manageable, it has to be like this:
which the "messages" class is above all data.
Please let me know if there is anyway I can adjust my js code to achieve this, thank you!
I think this is what you're trying to do but I'm unsure:
let messagesRef = myFirebase.ref('messages')
messagesRef.push({name: 'blah', text: 'bluh'})
I've solved it,
myFirebase = new Firebase("https://watercup-e06b3.firebaseio.com/messages/");
just add the "/messages" and everything will work!
Related
I am trying to update data properly. I have messed around as much as possible and can't seem to figure it out properly.
I'd appreciate any help in javascript
Data
{"KEWCFN": {"dataId": "KEWCFN","dataName": "12","dataSet": []}}
I want to be able to be able to properly update that JSON data to this.
{"KEWCFN": {"dataId": "KEWCFN","dataName": "12","dataSet": [{set1....},{set2....},{set3....}]}}
Hey im not sure understand your question but if you want to change dataSet in your data Array then you can do this:
Function updateMe(){
Var Data = {"KEWCFN": {"dataId": "KEWCFN","dataName":"12","dataSet": []}} ;
Data.dataSet[0]=‘set1....’;
Data.dataSet[1]=‘set2....’;
Data.dataSet[2]=‘set3....’;
}
This time I'm facing a problem with formatting data from Firebase. This is how structure in my database looks:
I'm getting it from database using this code:
const preObject = document.getElementById('object')
var parametryObject = firebase.database()
.ref('Parametry_powietrza')
.limitToLast(1)
.once('value').then(function(snapshot) {
var listaParametrow = snapshot.val();
console.log(listaParametrow);
preObject.innerText = JSON.stringify(snapshot.val(), null, 3)
});
And on my webpage it looks like:
My question is - how to properly refer to that data to be able to change its appearance using HTML and CSS?
Thank you! :)
It looks like you're trying to access the data inside your JSON object being returned to you from your FireBase RealTime database (RTDB). But the way you've structured your data makes it near impossible for your javascript to iterate through it.
Some pointers I can give you regarding your data in the Realtime Database atm:
1) Datetime is typically stored in what's called Epoch Time. Which is typically the number of seconds since Jan 1, 1970. The number can easily be converted back into text using various javascript time libraries. An easy one to try out is Luxon. You can see epoch time with this online convertor here.
2) Secondly, RTDB supports the creation of unique, sequential, sortable "push-id" whenever you call the .push({ myDataObject }) function. So there's no need to store the date and the time as the "keys" to your object. More info about the push-id here and here. It's really interesting stuff!
3) I hate to be writing this suggestion because it seems like taking a step back before you can take steps forward, but I feel like you would benefit alot on looking at some articles on designing databases and how to sensibly structure your data. Firebase also has a great introduction here. If it's any help, for your data structure, I suggest modifying your data structure to something like below:
{
Parametry_powietrza: {
[firebase_push_id]: {
timestamp: 726354821,
Cisnienie: 1007.78,
Temperatura: 19.23,
Wilgotnosc: 52.00,
},
[firebase_push_id]: {
timestamp: 726354821,
Cisnienie: 1007.78,
Temperatura: 19.23,
Wilgotnosc: 52.00,
}
}
}
That way, when firebase returns your data, you can iterate through the data much more easily and extract the information you need like:
database
.ref('Parametry_powietrza')
.limitToLast(10)
.once('value', snapshot => {
snapshot.forEach(child => {
// do what you need to do with the data
console.log("firebase push id", child.key);
console.log("data", child.val());
})
});
All the best! BTW are you using any javascript frameworks like React or Vue?
I started studying node.js, and now I'm trying to do a "Todo-App".
I'm trying to find the best way to transfer data from my database (using mongodb) into my hbs files, so I could display it.
From the server.js -> server to the hbs -> client (correct to me if I'm wrong please, by assuming that server.js is the server of course and the hbs file is the client)
So, I succeeded to do it by passing an array.
but when I'm trying to display in html desing, it just looking bad.
The code:
app.get('/allTasks',(req,res)=>{ //get (go to) the allTasks (hbs file)
Todo.find().then((todos) => {
console.log(todos);
var arrayOfTodos = [];
todos.forEach(function(element){
console.log("\n\n\n\n\n elemnt details: ",element.text + "\n",element.completed+"\n");
arrayOfTodos.push(element.text,element.completed);
});
res.render("allTasks.hbs", {
pageTitle: "Your tasks: ",
todos: arrayOfTodos
});
});
});
The result is:
You can see a picture
As you can see, its just looking bad... cause it just display an array,
an I want to display each task seperately.
Any tips?
Thanks a lot,
Sagiv
Instead of using push just do:
Todo.find().toArray(function(err, result){
arrayOfTodos = result;
})
Once you have your array, the design got nothing to do with mongodb. You will need to learn how to use your render technology. You need to touch your html template, so you should start by posting that.
The problem solved.
I just had to learn how to handle the data in the hbs side.
so the code is: (in hbs)
{{#each todos}}
{{missionNumber}} <br>
{{text}}<br>
completed = {{completed}}<br><br>
{{/each}}
as you can see, the each is a loop , that pass on the todos parameter (my array)
and i just have to display the data in the way i want it to be displayed.
thanks for your help.
So I am trying to scrape some content with node.js x-ray scraping framework. While I can get the content from a single page but for exemple only for one employee I can't get my head around on how to get for all the employees.
Working Exemple but return me the first employee:
const request =require('request');
const Xray=require('x-ray');
var x = Xray();
x('http://www.viadeo.com/fr/company/unicef',
'.pan',[{
name:'.pan-emp-name',
job:'.pan-emp-pos',
since:'.pan-emp-age'
// job:'#profile #overview-summary-current ol'
}]).write('result.json')
Thank you so much
x('http://www.viadeo.com/fr/company/unicef',
'#pan-emp .pan-employees .pan-empployee',[{
company:'#company-info .company-logo-picture',
nom:'.pan-emp-name',
job:'.pan-emp-pos',
depuis:'.pan-emp-age'
// job:'#profile #overview-summary-current ol'
}]).write('result.json')
Working like a charm,
So now my problem is to get the company info
I'm having massive problems with databinding to a ListView in a Windows 8 app using Javascript.
Inside the "activated" event on default.js I have written some code to get some data from a web service and push it into an array. This bit works OK and the array is populated.
The problem I have is that the app won't recognise the data. I have this code in a page called inspections.html:
data-win-options="{itemTemplate: select('#imageTextListCollectionTemplate'),
itemDataSource: dataList.dataSource,
layout: {type: WinJS.UI.ListLayout}}
and then in the "activated" event I declare:
var dataList = new Array();
and push the data from the web service into this array. But at runtime I get an error that says something along the lines of "can't find dataSource on undefined dataList".
I've done some of the examples on the MS website and in one of them it creates a dummy dataset and references it from a namespace. I kinda think that what I'm missing here is a namespace too but I don't know what the namespace for default.js is. Or maybe I'm wrong and it's something totally different.
Please help - this is so fundamental (and should be easy) but I can't get my head around it.
Do you want to create datalist in HTML or javascript?
It seems you want to create it from JavaScript. Assuming that you have already pushed your data into array from your webservice, you only need to call:
var dataList = new WinJS.Binding.List(array);
now accessing dataList.dataSource is perfectly valid.
Also, to create the datalist you don't always need an array. You could probably start with an empty list and then keep inserting data directly into the data list from web services, like:
var dataList = new WinJS.Binding.List([]);
dataList.push(value1);
dataList.push(value2);
...
Hope it helps. Let me know if you have any more questions.
If you are getting troubled by assigning datasource in HTML side
Prefer js side like
var list = new WinJS.Binding.List(array here);
listView.itemDataSource = list.dataSource;
by using this you can easily go through the data which you are binding to ListView.