Develop Reference

How to send data with Url Django

I want to send {{order.id}}, but getting error like pictuce in bellow, please helping me to solve problem
Image Error
Views.py:
def Detail_pem(request, idor):
print(idor)
return render(request, 'store/detail.html' )
pemby.html:
<!-- <button data-product="{{order.id}}" data-act="{{order.name}}" class="btn btn-warning id_order btntam" >Detail</button> -->
<button data-product="{{order.id}}" data-act="{{order.name}}" class="btn btn-warning id_order btntam" >Detail</button>
</td>
</tr>
{% endfor %}
</tbody>
</table>
</div>
<!-- <script type="text/JavaScript" src="{% static 'js/pem.js' %}"></script> -->
<script>
var id_order = document.getElementsByClassName('id_order')
for (i = 0; i < id_order.length; i++) {
id_order[i].addEventListener('click', function(){
var orid = this.dataset.product
var ornm = this.dataset.act
console.log('orid :', orid)
console.log('ornm :', ornm)
window.location.href = "{% url 'Detail_pem' %}"
})
}
urls.py:
path('Detail_pem/<idor>', Detail_pem, name='Detail_pem'),

You are redirecting through
window.location.href = "{% url 'Detail_pem' %}" without a variable.
But in your urls.py you are passing idor variable.
It should be: window.location.href = "{% url 'Detail_pem' order.id } %}".
And your urls.py change to this:
int:id
#if you are passing integer
path('Detail_pem/<int:id>', Detail_pem, name='Detail_pem'),
#or if you are passing string
path('Detail_pem/<str:id>', Detail_pem, name='Detail_pem'),

Fullcalender display events in Django

I am using full calendar in my in my Django project and I was wondering how I would get the model data to load as an event within the calendar. The issue is whenever I try to load the template into my code it loads up a white page with text in JSON format.
I was wondering if it was possible to get by this.
This is how my model looks like:
class CalenderEvent(models.Model):
event_name = models.CharField(max_length = 30)
start_date = models.DateTimeField(null=True,blank=True)
end_date = models.DateTimeField(null=True,blank=True)
event_description = models.TextField()
def __str__(self):
return self.event_name
This is how my view looks like:
def calender(request):
events = CalenderEvent.objects.all()
if request.method == 'GET':
form = ContactToAddEventForm()
event_arr = []
for i in events:
event_sub_arr = {}
event_sub_arr['title'] = i.event_name
start_date = datetime.datetime.strptime(str(i.start_date.date()), "%Y-%m-%d").strftime("%Y-%m-%d")
end_date = datetime.datetime.strptime(str(i.end_date.date()), "%Y-%m-%d").strftime("%Y-%m-%d")
event_sub_arr['start'] = start_date
event_sub_arr['end'] = end_date
event_arr.append(event_sub_arr)
return HttpResponse(json.dumps(event_arr))
context = {
"events" : events
}
return render(request, 'calender.htm', {'form': form}, context)
This is how my template looks like:
<link rel="stylesheet" href="{% static "fullcalender/daygrid/main.css" %}" >
<link rel="stylesheet" href="{% static "fullcalender/timegrid/main.css" %}" >
<link rel="stylesheet" href="{% static "fullcalender/core/main.css" %}" >
<script rel="stylesheet" href="{% static "fullcalender/core/main.js" %}" ></script>
<script src="{% static "fullcalender/core/main.js" %}"></script>
<script src="{% static "fullcalender/daygrid/main.js" %}"></script>
<script src="{% static "fullcalender/timegrid/main.js" %}"></script>
<script>
document.addEventListener('DOMContentLoaded', function() {
var calendarEl = document.getElementById('calendar');
var calendar = new FullCalendar.Calendar(calendarEl, {
plugins: [ 'timeGrid' ],
defaultView: 'timeGridWeek',
events: [
{% for i in events %}
{
title: "{{ i.event_name}}",
start: '{{ i.start_date|date:"Y-m-d" }}',
end: '{{ i.end_date|date:"Y-m-d" }}',
},
{% endfor %}
]
});
calendar.render();
});
</script>
<section>
<div class="container">
<div id = "calendar"></div>
</div>
</section>
I was looking at this stack overflow answer:
FullCalendar in Django

Update a variable every 5 second using jquery

I am using django to create a webpage and this is the first time I am doing so. I am trying to fetch the value of a variable from .py file at an interval of 5 seconds. Below is the HTML code:
<!DOCTYPE html>
<html>
<head>
<title>Like Post App</title>
<script
src="https://code.jquery.com/jquery-3.4.1.js"
integrity="sha256-WpOohJOqMqqyKL9FccASB9O0KwACQJpFTUBLTYOVvVU="
crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</head>
<body>
<div class = "display-3 color-red"><center>DataFlair AJAX Tutorial<br>Post APP</center></div>
{% for post in posts %}
<div class = 'container jumbotron'>
<h3 class="display-5">{{ forloop.counter }}. {{ post.post_heading }}</h3>
<p class="lead">{{ post.post_text }} </p>
<p>
<div type="text/css" class = "container">Author : {{ post.post_author }}</div>
<a class="likebutton btn btn-primary btn-lg" id="like{{ post.id }}" data-catid="{{ post.id }}">Like({{ post.like_ref.counter }})</a> </p> <p id="message{{post.id}}">
</p>
</div>
{% endfor %}
<script type="text/javascript">
setInterval(function() {
getvalue(); // Do something every 5 seconds
}, 5000);
getvalue();
function getvalue(){
var id;
id = $(this).attr("data-catid");
$.ajax(
{
type:"GET",
url: "like",
data:{
post_id: id
},
success: function( data )
{
$( '#like'+ id ).text("Like(" + data +")");
var i=parseInt(data);
console.log("Value= "+i);
}
}
)
}
</script>
</body>
</html>
Below is the views.py code:
import json
from django.shortcuts import render
from .models import Post, Like
from django.http import HttpResponse
# Create your views here.
#DataFlair #AJAX_tutorial
def index(request):
posts = Post.objects.all()
return render(request, 'post/index.html', { 'posts': posts })
def like(request):
if request.method == 'GET':
post_id = request.GET['post_id']
likedpost = Post.objects.get(id = post_id )
m = Like.objects.filter( post=likedpost ).first()
m.counter +=1
m.save()
value1= int(m.counter)
#data1= {'cmd': 'success', 'ctr': str(m.counter) }
return HttpResponse(value1)
#return HttpResponse(json.dumps(data1))
else:
return HttpResponse("unsuccesful")
I keep getting the following errors:
1) GET http://localhost:8000/ajax/like/ 500 (Internal Server Error)
2) GET http://localhost:8000/favicon.ico 404 (Not Found)
Please help.

I believe:
id = $(this).attr("data-catid");
is not pointing to the button... maybe you should try:
id = $(".likebutton").attr("data-catid");

how to read the csv Header columns in jquery / populate the list from python to jquery

Hello guys i have a html program in which i'm Moving the Items from One Multi Select List To Another using jQuery which is written like this:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title> upload </title>
</head>
<script>
$(function () {
function moveItems(origin, dest) {
$(origin).find(':selected').appendTo(dest);
}
function moveAllItems(origin, dest) {
$(origin).children().appendTo(dest);
}
$('#left').click(function () {
moveItems('#sbTwo', '#sbOne');
});
$('#right').on('click', function () {
moveItems('#sbOne', '#sbTwo');
});
$('#leftall').on('click', function () {
moveAllItems('#sbTwo', '#sbOne');
});
$('#rightall').on('click', function () {
moveAllItems('#sbOne', '#sbTwo');
});
});
</script>
<body>
<div class="container">
<h1>Large Data Generation</h1>
</div>
<h2>Move Items From One List to Another</h2>
<select id="sbOne" multiple="multiple">
<option value="1">Alpha</option>
<option value="2">Beta</option>
<option value="3">Gamma</option>
<option value="4">Delta</option>
<option value="5">Epsilon</option>
</select>
<select id="sbTwo" multiple="multiple">
<option value="6">Zeta</option>
<option value="7">Eta</option>
</select>
<br />
<input type="button" id="left" value="<" />
<input type="button" id="right" value=">" />
<input type="button" id="leftall" value="<<" />
<input type="button" id="rightall" value=">>" />
</body>
</html>
In this i'm able to move the items from one multi select to another but i want don't want to Hard code the items names i want it to read through the csv file and take the header columns of the csv file
This is the csv file:
with open("Data_Large2.csv", "rt") as f:
reader = csv.reader(f)
HeaderName = next(reader)
print("HeaderName-",HeaderName)
output:
['Asset_Id',
'Asset Family',
'Asset Name',
'Location',
'Asset Component']
This is the Header column name which I want to populate in place of Alpha, Beta..not there values which I have taken Is there any way to get the headers of the column from CSV file in jquery please help me ..thnx in advance

I don't know what exactly you are searching for but i assume that you are reading a csv file from web and you can also select more than one csv file For that i have made some change in your program : Note: Here i have change the "sbone" to "sourceHeaderFields" and "sbTwo" to "targetHeaderFields"
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title> upload </title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<link href="https://bootswatch.com/4/solar/bootstrap.min.css" rel="stylesheet" type="text/css">
</head>
<script>
$(function () {
function moveItems(origin, dest) {
$(origin).find(':selected').appendTo(dest);
}
function moveAllItems(origin, dest) {
$(origin).children().appendTo(dest);
}
$('#left').click(function () {
moveItems('#targetHeaderFields', '#sourceHeaderFields');
});
$('#right').on('click', function () {
moveItems('#sourceHeaderFields', '#targetHeaderFields');
});
$('#leftall').on('click', function () {
moveAllItems('#targetHeaderFields', '#sourceHeaderFields');
});
$('#rightall').on('click', function () {
moveAllItems('#sourceHeaderFields', '#targetHeaderFields');
});
$('#populateHeaderFields').on('click', function () {
alert("Inside populate list");
var files = ('#source_fileName').files;
alert("Files Count - "+ files);
});
$('#upload-form').on('change', function(evt) {
var filesCount = evt.target.files.length;
for (i = 0; i < filesCount; i++) {
var file = evt.target.files[i];
if (file) {
var reader = new FileReader();
// Read our file to an ArrayBuffer
reader.readAsArrayBuffer(file);
// Handler for onloadend event. Triggered each time the reading operation is completed (success or failure)
reader.onloadend = function (evt) {
// Get the Array Buffer
var data = evt.target.result;
// Grab our byte length
var byteLength = data.byteLength;
// Convert to conventional array, so we can iterate though it
var ui8a = new Uint8Array(data, 0);
// Used to store each character that makes up CSV header
var headerString = '';
// Iterate through each character in our Array
for (var i = 0; i < byteLength; i++) {
// Get the character for the current iteration
var char = String.fromCharCode(ui8a[i]);
// Check if the char is a new line
if (char.match(/[^\r\n]+/g) !== null) {
// Not a new line so lets append it to our header string and keep processing
headerString += char;
} else {
// We found a new line character, stop processing
break;
}
}
//Iterate through the list and populate the select element..
$.each(headerString.split(","), function(i,e){
$("#sourceHeaderFields").append($("<option>", {
text: e,
value: e
}));
});
console.log(headerString);
console.log("Next Read");
};
} else {
alert("Failed to load file");
}
}
});
});
</script>
<body>
<div class="container">
<h1>Large Data Generation</h1>
</div>
<form id = "upload-form" action="{{ url_for('upload') }}" method="POST" enctype="multipart/form-data">
<div id="file-selector">
<p>
<strong>Input File: </strong>
<input id="source_fileName" type="file" name="source_fileName" accept="csv/*" multiple >
</p>
</div>
<h2>Move Items From One List to Another</h2>
<select id="sourceHeaderFields" multiple="multiple">
</select>
<select id="targetHeaderFields" multiple="multiple">
</select>
<br />
<input type="button" id="left" value="<" />
<input type="button" id="right" value=">" />
<input type="button" id="leftall" value="<<" />
<input type="button" id="rightall" value=">>" />
</body>
</html>
I think this will help you get what you need

Facing problem in returning the ongoing upload status back to the HTML using AJAX in Django

I am trying to implement "Upload Progress Bar" in Django.
Following is my code in the template file:
{% extends "index_base.html" %}
{% block content %}
<script src="/media/js/functions.js" type="text/javascript"></script>
<script src="/media/js/jquery.js" type="text/javascript"> </script>
<script type="text/javascript">
var xhrObject1;
var xhrObject2;
function createXMLHttpObject()
{
var xhrObject; // The variable that makes Ajax possible!
try
{
xhrObject = new XMLHttpRequest();
}
catch (e)
{
try{
xhrObject = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e){
try {
xhrObject = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
xhrObject = null;
}
}
}
return xhrObject;
}
function ajaxFunction()
{
xhrObject1 = createXMLHttpObject();
if (xhrObject1 == null)
{
alert("Your browser does not support ajax.");
return;
}
xhrObject1.onreadystatechange = function(){
if(xhrObject1.readyState == 4){
document.getElementById("targetDiv").innerHTML = xhrObject1.responseText;
}
else
{
xhrObject2 = createXMLHttpObject();
xhrObject2.onreadystatechange = function(){
if(xhrObject2.readyState == 4){
document.getElementById("targetDiv").innerHTML = xhrObject2.responseText;
}
else
{
document.getElementById("targetDiv").innerHTML = "getting progress...";
}
}
xhrObject2.open("GET", "/upload_progress.psp", true);
xhrObject2.send(null);
}
}
var arrFiles = document.getElementById('id_file');
var fileToUpload = arrFiles.files[0];
xhrObject1.open("POST", "/upload.psp/", true);
xhrObject1.send(fileToUpload);
}
function submitForm()
{
document.forms["myform"].submit();
ajaxFunction();
return false;
}
</script>
<div id="main_container">
{% include "includes/nav.html" %}
<!------- Main Contents ---------->
<div id="contents_holder">
<div id="contents">
<div id="c_banner">
<span class="main_title">Upload File</span>
</div>
<div id="targetDiv" > </div>
<div id="setting">
<form name="myform" id="myform" action="/upload.psp/" method="post" enctype="multipart/form-data">
<h2>Upload File</h2></br>
<p>{{ form.file.label_tag }} {{ form.file }}</p></br>
<input type="button" value="Upload" name="uploadButton" onclick="javascript:return submitForm();"/>
<input type="button" value="Cancel" name="cancelUploadButton" onclick ="cancelUploadClicked()"/>
<input type="hidden" value="title" name="title" id="title" />
</form>
</div>
</div>
</div>
</div>
{% endblock %}
Following are my two functions inside views.py:
#condition(etag_func=None)
def upload(request):
if request.method == 'POST':
form = UploadFileForm(request.POST, request.FILES)
if form.is_valid():
#handle_uploaded_file(request.FILES['file'])
f = request.FILES['file']
filename = "/host_lighttpd/var/www/htdocs/satellite/static/Data/" + f.name
destination = open(filename, 'wb+')
for chunk in f.chunks():
destination.write(chunk)
#yield chunk
request.session['uploaded'] += chunk
destination.close()
return render_to_response('uploadsuccess.html')
else:
form = UploadFileForm()
return render_to_response('upload.html', {'form': form})
def upload_progress(request):
#uploaded = request.session['uploaded']
return HttpResponse("Upload progress function...")
#return HttpResponse(uploaded)
My problem is how can I return the upload status back to the
second ajax call (GET method), so that it can be eventually updated
inside the html.
I don't know how can I return the ongoing uploading status.
Any help would be appreciated. Thanks in advance.

I recently had to do a bit of digging to find a solution for this myself.
Check out :-
http://fairviewcomputing.com/blog/2008/10/21/ajax-upload-progress-bars-jquery-django-nginx/
I have not tried the solution referenced yet, but it looks reasonable enough.
It involves registering a custom file upload class to expose the upload progress information.