Create HTML table with Firebase Data - javascript

I have a firebase database set up that I need to create an HTML table with that necessary info. Below is how I have set up my firebase data.
{
"Markets" : {
"Athens" : {
"Item" : {
"name" : "Beef",
"price" : 10,
"salePrice" : 3
}
}
}
}
This is how I have my HTML table set up and my code to attempt to retrieve the data. The table is appropriately being created but I am not seeing any data. Any help would be greatly appreciated.
<table style="width:100%" id="ex-table">
<tr id="tr">
<th>Name:</th>
<th>Price:</th>
<th>Sale Price:</th>
</table>
<script>
var database = firebase.database();
database.ref().once('value', function(snapshot){
if(snapshot.exists()){
var content = '';
snapshot.forEach(function(data){
var val = data.val();
content +='<tr>';
content += '<td>' + val.name + '</td>';
content += '<td>' + val.price + '</td>';
content += '<td>' + val.salePrice + '</td>';
content += '</tr>';
});
$('#ex-table').append(content);
}
});
</script>


Right now you're reading the root node. There are a few more levels of data in your JSON before you get to the name, price and salesPrice properties. You'll either need to navigate those levels in your callback, or in your query. An example of the latter:
var database = firebase.database();
database.ref('Markets/Athens').once('value', function(snapshot){
if(snapshot.exists()){
var content = '';
snapshot.forEach(function(data){
var val = data.val();
content +='<tr>';
content += '<td>' + val.name + '</td>';
content += '<td>' + val.price + '</td>';
content += '<td>' + val.salePrice + '</td>';
content += '</tr>';
});
$('#ex-table').append(content);
}
});

Related

How to retrieve a value in Realtime Database using Javascript?

I don´t have a lot of programming experience, and I´m trying to solve the following:
Given this data structure using Realtime Database
Data Structure
I want to show in an HTML table the value of the "propina" key, but not the identifier that the Realtime Database generates.
Up until now, I´m running this code to retrieve the values of the data:
`
var database = firebase.database();
database.ref().once('value', function(snapshot){
if(snapshot.exists()){
var content = '';
snapshot.forEach(function(data){
var val = data.val();
content +='<tr>';
content += '<td>' + val.nombre + '</td>';
content += '<td>' + val.lugar + '</td>';
content += '<td>' + val.ubicacion + '</td>';
content += '<td>' + val.propina + '</td>';
content += '</tr>';
});
$('#ex-table').append(content);
}
});`
But the "propina" value is not displayed, giving me just \[object Object\] in the HTML.

The issue is that propina is an object, not a string or a number.
You need to access its value. You can access the value like this:
...
content += '<td>' + val.propina.value + '</td>';
...

display realtime database from firebase to html table

when i display the table my web app display undefined can someone help me please [realtime database
var database = firebase.database().ref().child('contact-#bluejetengineering/blue_jet/DB object Sensor');
database.once('value', function(snapshot){
if(snapshot.exists()){
var content = '';
snapshot.forEach(function(data){
var Sensor_1 = data.val().Sensor_1;
var Sensor_2 = data.val().Sensor_2;
var Sensor_3 = data.val().Sensor_3;
var Sensor_4 = data.val().Sensor_4
//content += '<tr>';
content += '<td>' + Sensor_1 + '</td>'; //column1
content += '<td>' + Sensor_2 + '</td>';//column2
content += '<td>' + Sensor_3 + '</td>';//column3
content += '<td>' + Sensor_4 + '</td>';//column4
content += '</tr>';
});
$('#ex-table').append(content);
}
});
</script>

Appending to tbody not showing data in table

I am trying to append some data to a Datatables tbody. I do recieve the data when I console.log() the data, but the data does not show when I try to append it to my Datatable (The id of my table is 'example' btw). I do not know where to go in terms of debugging this as well.
asyncRequest.then((tracks) => {
var tableData = '';
// rows
for (track in tracks) {
tableData += '<tr>';
tableData += '<td>' + tracks[track]._id + '</td>';
tableData += '<td>' + tracks[track].Position + '</td>';
tableData += '<td>' + tracks[track].Track + '</td>';
tableData += '<td>' + tracks[track].Artist + '</td>';
tableData += '<td>' + tracks[track].Streams + '</td>';
tableData += '<td>' + tracks[track].Url + '</td>';
tableData += '<td>' + tracks[track].Date + '</td>';
tableData += '</tr>';
}
console.log(tableData);
$(document).ready(function () {
var table = $('#example').DataTable();
$(table).find('tbody').append(tableData);
});
});
</script>
tracks: [0 … 99]
0:
_id: "5e8d677a6e5216bc865e084a"
Position: 1
Track: "Dance Monkey"
Artist: "Tones And I"
Streams: 6155025
Url: "https://open.spotify.com/track/1rgnBhdG2JDFTbYkYRZAku"
Date: "1/1/20"

Can u try this one fisrt destroy then append then refresh it
and put your document ready out of request and initialize there
$(document).ready(function () {
var table = $('#example').DataTable();
});
then after u take data appen it destroy it and refresh it
asyncRequest.then((tracks) => {
var tableData = '';
// rows
for (track in tracks) {
tableData += '<tr>';
tableData += '<td>' + tracks[track]._id + '</td>';
tableData += '<td>' + tracks[track].Position + '</td>';
tableData += '<td>' + tracks[track].Track + '</td>';
tableData += '<td>' + tracks[track].Artist + '</td>';
tableData += '<td>' + tracks[track].Streams + '</td>';
tableData += '<td>' + tracks[track].Url + '</td>';
tableData += '<td>' + tracks[track].Date + '</td>';
tableData += '</tr>';
}
console.log(tableData);
$('#example').DataTable().destroy();
$('#example').find('tbody').append(str);
$('#example').DataTable().draw();
});

How can I fetch the data in a single row

I am tying to fetch the data from firebase just like make single row of first element of all the headings in firebase database. i.e first element of Amount, key, time, total, Number should make a single row and then so on.
I am trying with foreach loop but I can refer to the correct refrence of firebase
//html code
<table style="width:100%" id="ex-table">
<tr id="tr">
<th>Amount</th>
<th>Key</th>
<th>Number</th>
<th>Time</th>
<th>Total</th>
</table>
//Javascript code
var database = firebase.database();
database.ref().once('value', function(snapshot){
if(snapshot.exists()){
var content = '';
snapshot.forEach(function(data){
var val = data.val();
content +='<tr>';
content += '<td>' + val.Amount + '</td>';
content += '<td>' + val.Key + '</td>';
content += '<td>' + val.Number + '</td>';
content += '<td>' + val.Time + '</td>';
content += '<td>' + val.Total + '</td>';
content += '</tr>';
});
$('#ex-table').append(content);
}
});
I am getting undefined instead of values

JS variable not working in AJAX success

Fetched data from database with php and ajax, Everything is ok except note variable is empty.Can somebody find out the issue why note value is not going to display. How can i fix it.
success: function(response) {
var cats = {};
response.results.forEach(function(element) {
cats[element.team] = cats[element.team] || [];
cats[element.team].push(element);
});
var i = 0;
Object.keys(cats).forEach(function(team) {
let html = '';
// Append the category header
html = '<tr>';
html += '<td>' + team + '</td>';
html += '</tr>';
$('table').append(html);
// Loop through the results for this category
cats[team].forEach(function(element) {
var id = element.id;
var teamId = element.team_id;
var names = element.player;
var result = element.result;
var note = element.note;
html = '<tr>';
html += '<input type="hidden" name="Id[]" value="' + id + '"/>';
html += '<input type="hidden" name="data[' + i + '][team_id]" value="' + teamId + '"/>';
html += '<td>' + names + '</td>';
html += '<td><input type="text" name="result[]" value="' + result + '"></td>';
html += '</tr>';
$('table').append(html);
});
// Append the textarea at the end of the results
html = '<tr>';
html += '<td><textarea placeholder="note..." name="data[' + i + '][Note]">' + note + '</textarea></td>';
html += '</tr>';
$('table').append(html);
i++;
});
}
This is the output
database table
JSON output
{"groupData":{"id":"23","group_name":"Group B"},"results":
[{"id":"2","team_id":"4","team":"Team
B","player":"Deno","result":"14","note":"Lost"},
{"id":"3","team_id":"4","team":"Team
B","player":"Niob","result":"26","note":"Lost"},
{"id":"4","team_id":"4","team":"Team
B","player":"Skion","result":"76","note":"lost"},
{"id":"5","team_id":"5","team":"Team
C","player":"Bela","result":"47","note":"won"},
{"id":"6","team_id":"5","team":"Team
C","player":"yomi","result":"57","note":"won"}]}

You should set note value infront of cats[team].forEach(function(element) {}). Hope to help, my friend :))
success: function(response) {
var cats = {};
response.results.forEach(function(element) {
cats[element.team] = cats[element.team] || [];
cats[element.team].push(element);
});
var i = 0;
Object.keys(cats).forEach(function(team) {
let html = '';
// Append the category header
html = '<tr>';
html += '<td>' + team + '</td>';
html += '</tr>';
$('table').append(html);
var note;
// Loop through the results for this category
cats[team].forEach(function(element) {
var id = element.id;
var teamId = element.team_id;
var names = element.player;
var result = element.result;
note = element.note;
html = '<tr>';
html += '<input type="hidden" name="Id[]" value="' + id + '"/>';
html += '<input type="hidden" name="data[' + i + '][team_id]" value="' + teamId + '"/>';
html += '<td>' + names + '</td>';
html += '<td><input type="text" name="result[]" value="' + result + '"></td>';
html += '</tr>';
$('table').append(html);
});
// Append the textarea at the end of the results
html = '<tr>';
html += '<td><textarea placeholder="note..." name="data[' + i + '][Note]">' + note + '</textarea></td>';
html += '</tr>';
$('table').append(html);
i++;
});
}

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