i have a formset inside my form on django and i need to do a button add to offer to the user the possibility to fill the fields of the formset as many time as he wants. i used a javascript code to do that and i do all the following steps to link the js file with the project, but when i click on the button nothing happens, i don't know why. please if anyone could help me.
i add staticfiles on my settings
STATIC_URL = '/static/'
STATICFILES_DIRS = (BASE_DIR / "static",)
part of my html file
{% load static %}
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>ordonnancement </title>
...
<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
</head>
<body class="bg-gray-100">
<form action="/" method="post" class="join-form mt-8 m-auto">
{% csrf_token %}
...
{% for form_data in formset %}
<div class="mt-4 w-1/2 mx-1">
{{ form_data.nom_qualité }}
</div>
<div class="mt-4 w-1/2 mx-1">
{{ form_data.id_qualité }}
</div>
<div class="mt-4 w-1/2 mx-1">
{{ form_data.date_début }}
</div>
<div class="mt-4 w-1/2 mx-1">
{{ form_data.date_fin }}
</div>
{% endfor %}
<button type="button" class="btn btn-sm btn-success add-form-row"
id="{{ formset.prefix }}">
ajouter
</button>
{{ formset.management_form }}
...
</form>
<script type="text/javascript" src="{% static 'js/formset.js' %}">
</script>
js file
function updateElementIndex(el, prefix, ndx) {
var id_regex = new RegExp('(' + prefix + '-\\d+-)');
var replacement = prefix + '-' + ndx + '-';
if ($(el).attr("for")) $(el).attr("for", $(el).attr("for").replace(id_regex,
replacement));
if (el.id) el.id = el.id.replace(id_regex, replacement);
if (el.name) el.name = el.name.replace(id_regex, replacement);
}
function addForm(btn, prefix) {
var formCount = parseInt($('#id_' + prefix + '-TOTAL_FORMS').val());
if (formCount < 1000) {
// Clone a form (without event handlers) from the first form
var row = $(".item:last").clone(false).get(0);
// Insert it after the last form
$(row).removeAttr('id').hide().insertAfter(".item:last").slideDown(300);
// Remove the bits we don't want in the new row/form
// e.g. error messages
$(".errorlist", row).remove();
$(row).children().removeClass("error");
// Relabel or rename all the relevant bits
$(row).find('.formset-field').each(function () {
updateElementIndex(this, prefix, formCount);
$(this).val('');
$(this).removeAttr('value');
$(this).prop('checked', false);
});
// Add an event handler for the delete item/form link
$(row).find(".delete").click(function () {
return deleteForm(this, prefix);
});
// Update the total form count
$("#id_" + prefix + "-TOTAL_FORMS").val(formCount + 1);
} // End if
return false;
}
function deleteForm(btn, prefix) {
var formCount = parseInt($('#id_' + prefix + '-TOTAL_FORMS').val());
if (formCount > 1) {
// Delete the item/form
var goto_id = $(btn).find('input').val();
if( goto_id ){
$.ajax({
url: "/" + window.location.pathname.split("/")[1] + "/formset-data-delete/"+ goto_id +"/
next="+ window.location.pathname,
error: function () {
console.log("error");
},
success: function (data) {
$(btn).parents('.item').remove();
},
type: 'GET'
});
}else{
$(btn).parents('.item').remove();
}
var forms = $('.item'); // Get all the forms
// Update the total number of forms (1 less than before)
$('#id_' + prefix + '-TOTAL_FORMS').val(forms.length);
var i = 0;
// Go through the forms and set their indices, names and IDs
for (formCount = forms.length; i < formCount; i++) {
$(forms.get(i)).find('.formset-field').each(function () {
updateElementIndex(this, prefix, i);
});
}
} // End if
return false;
}
$("body").on('click', '.remove-form-row',function () {
deleteForm($(this), String($('.add-form-row').attr('id')));
});
$("body").on('click', '.add-form-row',function () {
return addForm($(this), String($(this).attr('id')));
});
Related
I found difficult to change the color of the like button when the button hit and increase by +1 (in likes) in Django using ajax
my html template
<form method="POST" action="{% url 'video:like' video.pk %}" id="my-like-form">
{% csrf_token %}
<input type="hidden" class="likin" name="next" value="{{ request.path }}">
<button class="remove-default-btn" type="submit" id="openPopup" class="like-btn{{ request.path }}" style="border: none; ">
<i class="fa fa-thumbs-up" aria-hidden="true"><span>{{ video.likes.all.count }}</span></i>
Like
</button>
JavaScript
$("#my-like-form").submit(function(e){
e.preventDefault(); // Prevent form submission
let form = $(this);
let url = form.attr("action");
let res
const likes = $(`.like-btn{{ request.path }}`).text();// this code stopping the function of like button from work
const trimCount = parseInt(likes)
$.ajax({
type: "POST",
url: url,
data: form.serialize(),
dataType: "json",
success: function(response) {
selector = document.getElementsByName(response.next);
if(response.liked==true){
$(selector).css("color","blue");
res = trimCount - 1
} else if(response.liked==false){
$(selector).css("color","black");
res = trimCount + 1
}
}
})
})
Instead of using jinja code inside jquery code you can simple use $(this).find("button[class*=like-btn] span") this will give you span tag which have your total likes count then using .text() add new count to span tag.
Demo Code :
//suppose this return from server
var response = {
"liked": true
}
$("#my-like-form").submit(function(e) {
e.preventDefault();
let form = $(this);
let url = form.attr("action");
let res
//get like button and then find span to get total value
const likes = $(this).find("button[class*=like-btn] span").text();
const trimCount = parseInt(likes)
console.log(trimCount)
var selector = $(this).find("button[class*=like-btn]") //to select that button
/* $.ajax({
type: "POST",
url: url,
data: form.serialize(),
dataType: "json",
success: function(response) {
*/
if (response.liked == true) {
$(selector).css("color", "blue");
res = trimCount + 1
} else if (response.liked == false) {
$(selector).css("color", "black");
res = trimCount - 1
}
$(selector).find("span").text(res) //add that value inside span
/*}
})*/
})
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.2/css/all.min.css" integrity="sha512-HK5fgLBL+xu6dm/Ii3z4xhlSUyZgTT9tuc/hSrtw6uzJOvgRr2a9jyxxT1ely+B+xFAmJKVSTbpM/CuL7qxO8w==" crossorigin="anonymous" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form method="POST" action="{% url 'video:like' video.pk %}" id="my-like-form">
{% csrf_token %}
<input type="hidden" class="likin" name="next" value="{{ request.path }}">
<!--you have two clas attribute merge that in one here `1` is just for demo replace that with like-btn{{ request.path }} -->
<button class="remove-default-btn like-btn1" type="submit" id="openPopup" style="border: none; ">
<i class="fa fa-thumbs-up" aria-hidden="true"><span>23</span></i>
Like
</button>
</form>
I am building a Django e-commerce website and as I was working on my cart functionality I noticed that every time I try to change the quantity of a specific item in the cart, all the items in the cart are re-sorted in a different order. I was wondering if there's any way I can sort the items in the backend before they are displayed.
** I am getting this error only when the user is "Authenticated" ** Guest checkout is working correctly
This is my cart Views.py
def cart(request):
# Authenticated Checkout
if request.user.is_authenticated:
customer = request.user.customer
order, created = Order.objects.get_or_create(customer=customer, complete=False)
cartItems = order.get_cart_items
items = order.orderitem_set.all()
if cartItems == 0:
context = {"items": items, "order": order, "cartItems": cartItems}
return render(request, "cart_empty.html", context)
#Guest Checkout
else:
data = cartData(request)
cartItems = data["cartItems"]
order = data["order"]
items = data["items"]
if cartItems == 0:
context = {"items": items, "order": order, "cartItems": cartItems}
return render(request, "cart_empty.html", context)
context = {"items":items, "order": order, "cartItems":cartItems}
return render(request, "cart.html", context)
def update_cart(request):
data = json.loads(request.body)
productId = data["productId"]
action = data["action"]
customer = request.user.customer
product = Product.objects.get(id=productId)
order, created = Order.objects.get_or_create(customer=customer, complete=False)
orderItem, created = OrderItem.objects.get_or_create(order=order, product=product)
if action == "add":
orderItem.quantity = (orderItem.quantity + 1)
elif action == "reduce":
orderItem.quantity = (orderItem.quantity - 1)
orderItem.save()
if action == "remove":
orderItem = orderItem.delete()
return JsonResponse("item was added", safe=False)
This is My JavaScript File
// Getting the cart cookie Value stored in the browser
function getCookie(cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for(var i=0; i<ca.length; i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1);
if (c.indexOf(name) == 0) return c.substring(name.length,c.length);
}
return "";
}
var cart = JSON.parse(getCookie("cart"));
// Finding all the Minus buttons on the page and adding a click event listener to each one
const reduce_btn = document.getElementsByClassName("btn minus1 update-cart")
for (i = 0; i < reduce_btn.length; i++) {
reduce_btn[i].addEventListener("click", function(event){
var productId = this.dataset.id
var action = this.dataset.action
if (user === "AnonymousUser"){
addCookieItem(productId, action)
} else {
updateUserOder(productId,action)
}
})
}
// Finding all the Plus buttons on the page and adding a click event listener to each one
const increase_btn = document.getElementsByClassName("btn add1 update-cart")
for (i = 0; i < increase_btn.length; i++){
increase_btn[i].addEventListener("click", function(event){
var productId = this.dataset.id
var action = this.dataset.action
if (user === "AnonymousUser"){
addCookieItem(productId, action)
} else {
updateUserOder(productId,action)
}
})
}
// Finding all the remove buttons on the page and adding a click event listener to each one
const removeButton = document.getElementsByClassName("removeButton")
for (i = 0; i < removeButton.length; i++) {
removeButton[i].addEventListener("click", function(event){
var productId = this.dataset.id
var action = this.dataset.action
if (user === "AnonymousUser"){
removeFromCart(productId, action)
} else {
updateUserOder(productId,action)
}
})
}
// Removing the product from the order if the remove button is clicked
function removeFromCart(productId, action) {
if (action == 'remove'){
delete cart[productId];
}
document.cookie ='cart=' + JSON.stringify(cart) + ";domain=;path=/"
location.reload()
}
// (Guest Checkout) Updating the order of the customer if he is not authenticated
function addCookieItem(productId, action) {
console.log("not logged in..........")
if (action == 'add'){
cart[productId]['quantity'] += 1
}
if (action == 'reduce'){
cart[productId]['quantity'] -= 1
}
document.cookie ='cart=' + JSON.stringify(cart) + ";domain=;path=/"
location.reload()
}
// csrf token
var csrftoken = localStorage.getItem("csrftoken")
// (Authenticated Checkout) Updating the order of the customer if he is Authenticated
function updateUserOder(productId, action){
var url = "http://127.0.0.1:8000/update_cart/"
fetch(url, {
method: "POST",
headers: {
"Content-Type":"application/json",
"X-CSRFToken":csrftoken,
},
body:JSON.stringify({"productId": productId, "action": action})
})
.then((response) =>{
return response.json();
})
.then((data) => {
location.reload()
})
}
This is my HTML File
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1.0">
<title>Cart</title>
<link rel="stylesheet" type="text/css" href="{% static 'css/cart.css' %}">
<script type="text/javascript">
var user = "{{request.user}}"
</script>
</head>
<body>
<!-- navigation menu -->
{% include "topnav.html" %}
<div class="maincontent">
<h1 class="hhh1" style="font-size:50px; margin:0px; margin-bottom:30px">Your Cart</h1>
<div class="centerblock">
<!-- DYNAMIC CONTENT GOES HERE -->
<div class="cart-row">
<span class="cart-item cart-header cart-column">ITEM</span>
<span class="cart-header cart-column">PRICE</span>
<span class="cart-quantity cart-header cart-column">QUANTITY</span>
</div>
<div class="cart-items">
{% for item in items %}
<div>
<div class="cart-item cart-column">
<img class="cart-item-image" src="{{item.product.imageURL}}" width="100" height="100">
<span class="cart-item-title">{{item.product.title}}</span>
</div>
<span class="cart-price cart-column" data-price="{{item.product.price}}" >£{{item.product.price}}</span>
<div class="cart-quantity cart-column">
<div class="quantity">
<button data-id={{item.product.id}} data-action="reduce" id="minus" class="btn minus1 update-cart" >-</button>
<input class="cart-quantity-input quantity" type="number" id="id_form-0-quantity" name="quantity" min="1" max="5" value="{{item.quantity}}">
<button data-id={{item.product.id}} data-action="add" id="plus" class="btn add1 update-cart" >+</button>
<button data-id={{item.product.id}} data-action="remove" class="removeButton" type="button">REMOVE</button>
</div>
</div>
</div>
{% endfor %}
<div class="cart-total">
<strong class="cart-total-title">Total</strong>
<span class="cart-total-price">£{{order.get_cart_total}}</span>
</div>
<div class="ordersummary">
<form action="checkout-info" method="post">
{% csrf_token %}
<input type="submit" value="CHECKOUT">
</form>
</div>
</div>
</div>
</div>
{% include "footer.html" %}
<script src="{% static 'js/test2.js' %}" ></script>
</body>
</html>
Assuming you want them sorted in the reverse order they were added to the cart, you can sort them by their id field:
items = order.orderitem_set.order_by('-id')
I am trying to make a form which includes the functionality of Add/Delete Row. And I am following this tutorial.
The problem that I am facing is that I am unable to show the Add or remove button as well as the input fields in the form.
Screenshot:
Here's the template:
<html>
<head>
<title>gffdfdf</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<form action="" method="post" class="">
{% csrf_token %}
<h2> Team</h2>
{% for field in form %}
{{ field.errors }}
{{ field.label_tag }} : {{ field }}
{% endfor %}
{{ form.players.management_form }}
<h3> Product Instance(s)</h3>
<table id="table-product" class="table">
<thead>
<tr>
<th>player name</th>
<th>highest score</th>
<th>age</th>
</tr>
</thead>
{% for player in form.players %}
<tbody class="player-instances">
<tr>
<td>{{ player.pname }}</td>
<td>{{ player.hscore }}</td>
<td>{{ player.age }}</td>
<td><input id="input_add" type="button" name="add" value=" Add More "
class="tr_clone_add btn data_input"></td>
</tr>
</tbody>
{% endfor %}
</table>
<button type="submit" class="btn btn-primary">save</button>
</form>
</div>
<script>
var i = 1;
$("#input_add").click(function () {
$("tbody tr:first").clone().find(".data_input").each(function () {
if ($(this).attr('class') == 'tr_clone_add btn data_input') {
$(this).attr({
'id': function (_, id) {
return "remove_button"
},
'name': function (_, name) {
return "name_remove" + i
},
'value': 'Remove'
}).on("click", function () {
var a = $(this).parent();
var b = a.parent();
i = i - 1
$('#id_form-TOTAL_FORMS').val(i);
b.remove();
$('.player-instances tr').each(function (index, value) {
$(this).find('.data_input').each(function () {
$(this).attr({
'id': function (_, id) {
var idData = id;
var splitV = String(idData).split('-');
var fData = splitV[0];
var tData = splitV[2];
return fData + "-" + index + "-" + tData
},
'name': function (_, name) {
var nameData = name;
var splitV = String(nameData).split('-');
var fData = splitV[0];
var tData = splitV[2];
return fData + "-" + index + "-" + tData
}
});
})
})
})
} else {
$(this).attr({
'id': function (_, id) {
var idData = id;
var splitV = String(idData).split('-');
var fData = splitV[0];
var tData = splitV[2];
return fData + "-" + i + "-" + tData
},
'name': function (_, name) {
var nameData = name;
var splitV = String(nameData).split('-');
var fData = splitV[0];
var tData = splitV[2];
return fData + "-" + i + "-" + tData
}
});
}
}).end().appendTo("tbody");
$('#id_form-TOTAL_FORMS').val(1 + i);
i++;
});
</script>
</body>
</html>
Please help me figure out what the code is missing, I tried the solution given in comments too but that only solves the input fields problem
You can do this by looping through the last row added to the table and then updating all id & name attributes with new incremented i value like:
$("tbody tr:last :input").each(function() {
$(this).attr({
'id': function(_, id) {
return id.replace(/\d/g, i)
},
'name': function(_, name) {
return name.replace(/\d/g, i)
}
})
})
Also as Paul mentioned change players to player
I haven't reproduced your code so I can't be sure, but when I look at your models I read:
class PlayerForm(forms.Form):
pname = forms.CharField()
hscore= forms.IntegerField()
age = forms.IntegerField()
PlayerFormset= formset_factory(PlayerForm)
class TeamForm(forms.Form):
tname= forms.CharField()
player= PlayerFormset()
You pass the Teamform to the template in the variable form. That means you can access the individual player forms with:
{% for player in form.player %}
...
{% endfor %}
In your code I read form.players instead of form.player. Also at the top I read form.players.management_form. Django will not recognize these variables so return empty values. You can check this by looking at the HTML elements in your browser. In the example in the comments in the link you provided it says correctly form.player. I am not sure why in that case the add / remove button would not show.
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Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 3 years ago.
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I am working on an application where I want to implement the django-private-chat in for one to one messaging feature after I did everything which is said in the documentation I ran the server and got to the link http://127.0.0.1:8000/dialogs/ I am getting this error please help me out I have included the error traceback also
dialogs.html:
% extends "base.html" %
{% load static %}
{% load i18n %}
{% block css %}
{{ block.super }}
<link href="{% static "django_private_chat/css/django_private_chat.css" %}" rel="stylesheet" type="text/css" media="all">
{% endblock css %}
{% block content %}
<input id="owner_username" type="hidden" value="{{ request.user.username }}">
<div class="container">
<div class="col-md-3">
<div class="user-list-div">
<ul>
{% for dialog in object_list %}
<li>
{% if dialog.owner == request.user %}
{% with dialog.opponent.username as username %}
<a href="{% url 'dialogs_detail' username %}" id="user-{{ username }}"
class="btn btn-danger">{% trans "Chat with" %} {{ username }}</a>
{% endwith %}
{% else %}
{% with dialog.owner.username as username %}
<a href="{% url 'dialogs_detail' username %}" id="user-{{ username }}"
class="btn btn-danger">{% trans "Chat with" %} {{ username }}</a>
{% endwith %}
{% endif %}
</li>
{% endfor %}
</ul>
</div>
</div>
<div class="col-md-9">
<div class="row">
<div class="col-md-3 col-md-offset-9">
<span class="pull-right" hidden id="typing-text">
<strong>{{ opponent_username }} {% trans "is typing..." %}</strong>
</span>
</div>
<p>
{{ opponent_username }}
</p>
<p class="text-success" id="online-status" style="display: none">{% trans "Online" %}</p>
<p class="text-danger" id="offline-status" style="display: none">{% trans "Offline" %}</p>
<div class="messages-container">
<div id="messages" class="messages">
{% for msg in active_dialog.messages.all %}
<div class="row {% if msg.read %}msg-read{% else %}msg-unread{% endif %}"
data-id="{{ msg.id }}">
<p class="{% if msg.sender == request.user %}pull-left{% else %}pull-right{% endif %}">
<span class="username">{{ msg.sender.username }}:</span>
{{ msg.text }}
<span class="timestamp">– <span
data-livestamp="{{ msg.get_formatted_create_datetime }}">{{ msg.get_formatted_create_datetime }}</span></span>
</p>
</div>
{% endfor %}
</div>
</div>
</div>
<div class="row">
<div class="add-message">
<div class="form-group">
<textarea id="chat-message" class="form-control message"
placeholder="{% trans 'Write a message' %}"></textarea>
</div>
<div class="form-group clearfix">
<input id="btn-send-message" type="submit" class="btn btn-primary pull-right send-message"
style="margin-left: 10px;" value="{% trans 'Send' %}"/>
</div>
</div>
</div>
</div>
</div>
{% endblock %}
{% block extra_js %}
{{ block.super }}
<script src="https://cdnjs.cloudflare.com/ajax/libs/scrollmonitor/1.2.0/scrollMonitor.js"
integrity="sha256-BseZlDlA+yL4qu+Voi82iFa5aaifralQEXIjOjaXgeo=" crossorigin="anonymous"></script>
<script>
var base_ws_server_path = "{{ ws_server_path }}";
$(document).ready(function () {
var websocket = null;
var monitor = null;
function initReadMessageHandler(containerMonitor, elem) {
var id = $(elem).data('id');
var elementWatcher = containerMonitor.create(elem);
elementWatcher.enterViewport(function () {
var opponent_username = getOpponnentUsername();
var packet = JSON.stringify({
type: 'read_message',
session_key: '{{ request.session.session_key }}',
username: opponent_username,
message_id: id
});
$(elem).removeClass('msg-unread').addClass('msg-read');
websocket.send(packet);
});
}
function initScrollMonitor() {
var containerElement = $("#messages");
var containerMonitor = scrollMonitor.createContainer(containerElement);
$('.msg-unread').each(function (i, elem) {
if ($(elem).hasClass('opponent')){
initReadMessageHandler(containerMonitor, elem);
}
});
return containerMonitor
}
function getOpponnentUsername() {
return "{{ opponent_username }}";
}
// TODO: Use for adding new dialog
function addNewUser(packet) {
$('#user-list').html('');
packet.value.forEach(function (userInfo) {
if (userInfo.username == getUsername()) return;
var tmpl = Handlebars.compile($('#user-list-item-template').html());
$('#user-list').append(tmpl(userInfo))
});
}
function addNewMessage(packet) {
var msg_class = "";
if (packet['sender_name'] == $("#owner_username").val()) {
msg_class = "pull-left";
} else {
msg_class = "pull-right";
}
var msgElem =
$('<div class="row msg-unread" data-id="' + packet.message_id + '">' +
'<p class="' + msg_class + '">' +
'<span class="username">' + packet['sender_name'] + ': </span>' +
packet['message'] +
' <span class="timestamp">– <span data-livestamp="' + packet['created'] + '"> ' + packet['created'] + '</span></span> ' +
'</p> ' +
'</div>');
$('#messages').append(msgElem);
scrollToLastMessage()
}
function scrollToLastMessage() {
var $msgs = $('#messages');
$msgs.animate({"scrollTop": $msgs.prop('scrollHeight')})
}
function generateMessage(context) {
var tmpl = Handlebars.compile($('#chat-message-template').html());
return tmpl({msg: context})
}
function setUserOnlineOffline(username, online) {
var elem = $("#user-" + username);
if (online) {
elem.attr("class", "btn btn-success");
} else {
elem.attr("class", "btn btn-danger");
}
}
function gone_online() {
$("#offline-status").hide();
$("#online-status").show();
}
function gone_offline() {
$("#online-status").hide();
$("#offline-status").show();
}
function flash_user_button(username) {
var btn = $("#user-" + username);
btn.fadeTo(700, 0.1, function () {
$(this).fadeTo(800, 1.0);
});
}
function setupChatWebSocket() {
var opponent_username = getOpponnentUsername();
websocket = new WebSocket(base_ws_server_path + '{{ request.session.session_key }}/' + opponent_username);
websocket.onopen = function (event) {
var opponent_username = getOpponnentUsername();
var onOnlineCheckPacket = JSON.stringify({
type: "check-online",
session_key: '{{ request.session.session_key }}',
username: opponent_username
{# Sending username because the user needs to know if his opponent is online #}
});
var onConnectPacket = JSON.stringify({
type: "online",
session_key: '{{ request.session.session_key }}'
});
console.log('connected, sending:', onConnectPacket);
websocket.send(onConnectPacket);
console.log('checking online opponents with:', onOnlineCheckPacket);
websocket.send(onOnlineCheckPacket);
monitor = initScrollMonitor();
};
window.onbeforeunload = function () {
var onClosePacket = JSON.stringify({
type: "offline",
session_key: '{{ request.session.session_key }}',
username: opponent_username,
{# Sending username because to let opponnent know that the user went offline #}
});
console.log('unloading, sending:', onClosePacket);
websocket.send(onClosePacket);
websocket.close();
};
websocket.onmessage = function (event) {
var packet;
try {
packet = JSON.parse(event.data);
console.log(packet)
} catch (e) {
console.log(e);
}
switch (packet.type) {
case "new-dialog":
// TODO: add new dialog to dialog_list
break;
case "user-not-found":
// TODO: dispay some kind of an error that the user is not found
break;
case "gone-online":
if (packet.usernames.indexOf(opponent_username) != -1) {
gone_online();
} else {
gone_offline();
}
for (var i = 0; i < packet.usernames.length; ++i) {
setUserOnlineOffline(packet.usernames[i], true);
}
break;
case "gone-offline":
if (packet.username == opponent_username) {
gone_offline();
}
setUserOnlineOffline(packet.username, false);
break;
case "new-message":
if (packet['sender_name'] == opponent_username || packet['sender_name'] == $("#owner_username").val()) {
addNewMessage(packet);
if (packet['sender_name'] == opponent_username) {
initReadMessageHandler(monitor, $("div[data-id='" + packet['message_id'] + "']"));
}
} else {
flash_user_button(packet['sender_name']);
}
break;
case "opponent-typing":
var typing_elem = $('#typing-text');
if (!typing_elem.is(":visible")) {
typing_elem.fadeIn(500);
} else {
typing_elem.stop(true);
typing_elem.fadeIn(0);
}
typing_elem.fadeOut(3000);
break;
case "opponent-read-message":
if (packet['username'] == opponent_username) {
$("div[data-id='" + packet['message_id'] + "']").removeClass('msg-unread').addClass('msg-read');
}
break;
default:
console.log('error: ', event)
}
}
}
function sendMessage(message) {
var opponent_username = getOpponnentUsername();
var newMessagePacket = JSON.stringify({
type: 'new-message',
session_key: '{{ request.session.session_key }}',
username: opponent_username,
message: message
});
websocket.send(newMessagePacket)
}
$('#chat-message').keypress(function (e) {
if (e.which == 13 && this.value) {
sendMessage(this.value);
this.value = "";
return false
} else {
var opponent_username = getOpponnentUsername();
var packet = JSON.stringify({
type: 'is-typing',
session_key: '{{ request.session.session_key }}',
username: opponent_username,
typing: true
});
websocket.send(packet);
}
});
$('#btn-send-message').click(function (e) {
var $chatInput = $('#chat-message');
var msg = $chatInput.val();
if (!msg) return;
sendMessage($chatInput.val());
$chatInput.val('')
});
setupChatWebSocket();
scrollToLastMessage();
});
</script>
{% endblock %}
base.html:
{% load static %}
<!-- Their site uses old school block layout -->
{% block extra_js %}
<!-- Your package using 2SoD block layout -->
{% block javascript %}
<script src="{% static 'js/ninja.js' %}" type="text/javascript"></script>
{% endblock javascript %}
{% endblock extra_js %}
It seems you are calling {{ block.super }} on a base template.
You should include a base template using {% extends "base_template_name.html" %} before calling {{ block.super }}.
This would include content from the super template ("base_template_name.html") in your "dialog.html" template, instead of overriding it. You may also try just removing or commenting out the {{ block.super }} call if you don't need any content from the super template.
Please post your code here if you still can't get it to work. Hope it works for you!
{% extends "base.html" %}
{% load static %}
{% load i18n %}
{% block css %}
<link href="{% static "django_private_chat/css/django_private_chat.css" %}" rel="stylesheet" type="text/css" media="all">
{% endblock css %}
I am trying to make a voting app using Blockchain on truffle framework. The data from the network is not rendered on the webpage.
Only loading is displayed but the actual content is not displayed even though I have connected by Blockchain accounts from Ganache to my metamask extension.
Here is my code:
Election.sol
pragma solidity ^0.5.0;
contract Election {
// Model a Candidate for first past the post system
struct Candidatepost {
uint id;
string name;
uint voteCount;
}
// Model as candidate for proportional party system
struct Candidateparty {
uint id;
string name;
uint voteCount;
}
// Store accounts that have voted
mapping(address => bool) public voters;
// Store Candidates
// Fetch Candidate
mapping(uint => Candidatepost) public cand_post;
mapping(uint => Candidateparty) public cand_party;
// Store Candidates Count
uint public partyCount;
uint public postCount;
uint[] public candidatesCount = [postCount,partyCount];
constructor () public {
addpostCandidate("Candidate 1");
addpostCandidate("Candidate 2");
addpartyCandidate("Candidate 1");
addpartyCandidate("Candidate 2");
candidatesCount = [postCount,partyCount];
}
function addpostCandidate (string memory _name) private {
postCount ++;
cand_post[postCount] = Candidatepost(postCount, _name, 0);
}
function addpartyCandidate (string memory _name) private {
partyCount ++;
cand_party[partyCount] = Candidateparty(partyCount, _name, 0);
}
// voted event
event votedEvent (
uint indexed _candidateId1,
uint indexed _candidateId2
);
function vote (uint _candidateId1, uint _candidateId2) public {
// require that they haven't voted before
require(!voters[msg.sender]);
// require a valid candidate
require(_candidateId1 > 0 && _candidateId1 <= postCount && _candidateId2 > 0 && _candidateId2 <= partyCount);
// record that voter has voted
voters[msg.sender] = true;
// update candidate vote Count
cand_post[_candidateId1].voteCount ++;
cand_party[_candidateId2].voteCount ++;
// trigger voted event
emit votedEvent(_candidateId1, _candidateId2);
}
}
App.js
App = {
web3Provider: null,
contracts: {},
account: '0x0',
init: function() {
return App.initWeb3();
},
initWeb3: function() {
// TODO: refactor conditional
if (typeof web3 !== 'undefined') {
// If a web3 instance is already provided by Meta Mask.
App.web3Provider = web3.currentProvider;
web3 = new Web3(web3.currentProvider);
} else {
// Specify default instance if no web3 instance provided
App.web3Provider = new Web3.providers.HttpProvider('http://localhost:7545');
web3 = new Web3(App.web3Provider);
}
return App.initContract();
},
initContract: function() {
$.getJSON("Election.json", function(election) {
// Instantiate a new truffle contract from the artifact
App.contracts.Election = TruffleContract(election);
// Connect provider to interact with contract
App.contracts.Election.setProvider(App.web3Provider);
App.listenForEvents();
return App.render();
});
},
// Listen for events emitted from the contract
listenForEvents: function() {
App.contracts.Election.deployed().then(function(instance) {
// Restart Chrome if you are unable to receive this event
// This is a known issue with Metamask
// https://github.com/MetaMask/metamask-extension/issues/2393
instance.votedEvent({}, {
fromBlock: 0,
toBlock: 'latest'
}).watch(function(error, event) {
console.log("event triggered", event)
// Reload when a new vote is recorded
App.render();
});
});
},
render: function() {
var electionInstance;
var loader = $("#loader");
var content = $("#content");
loader.show();
content.hide();
// Load account data
web3.eth.getCoinbase(function(err, account) {
if (err === null) {
App.account = account;
$("#accountAddress").html("Your Account: " + account);
}
});
//load contract data
App.contracts.Election.deployed().then(function(instance) {
electionInstance = instance;
return electionInstance.candidatesCount();
}).then(function(1) {
var postcandidatesResults = $("#postcandidatesResults");
postcandidatesResults.empty();
var partycandidatesResults = $("#partycandidatesResults");
partycandidatesResults.empty();
var postcandidatesSelect = $('#postcandidatesSelect');
postcandidatesSelect.empty();
var partycandidatesSelect = $('#partycandidatesSelect');
partycandidatesSelect.empty();
for (var i = 1; i <= 2; i++) {
electionInstance.cand_post(i).then(function(candidate) {
var id = candidate[0];
var name = candidate[1];
var voteCount = candidate[2];
// Render candidate Result
var candidateTemplate = "<tr><th>" + id + "</th><td>" + name + "</td><td>" + voteCount + "</td></tr>";
postcandidatesResults.append(candidateTemplate);
// Render candidate ballot option
var candidateOption = "<option value='" + id + "' >" + name + "</ option>";
postcandidatesSelect.append(candidateOption);
});
}
for (var j = 1; j <= 2; j++) {
electionInstance.cand_party(i).then(function(candidate) {
var id2 = candidate[0];
var name2 = candidate[1];
var voteCount2 = candidate[2];
// Render candidate Result
var candidateTemplate2 = "<tr><th>" + id2 + "</th><td>" + name2 + "</td><td>" + voteCount2 + "</td></tr>";
partycandidatesResults.append(candidateTemplate2);
// Render candidate ballot option
var candidateOption2 = "<option value='" + id2 + "' >" + name2 + "</ option>";
partycandidatesSelect.append(candidateOption2);
});
}
return electionInstance.voters(App.account);
}).then(function(hasVoted) {
// Do not allow a user to vote
if(hasVoted) {
$('form').hide();
}
loader.hide();
content.show();
}).catch(function(error) {
console.warn(error);
});
},
castVote: function() {
var candidateId1 = $('#postcandidatesSelect').val();
var candidateId2 = $('#partycandidatesSelect').val();
App.contracts.Election.deployed().then(function(instance) {
return instance.vote(candidateId1, candidateId2, { from: App.account });
}).then(function(result) {
// Wait for votes to update
$("#content").hide();
$("#loader").show();
}).catch(function(err) {
console.error(err);
});
}
};
$(function() {
$(window).load(function() {
App.init();
});
});
Index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<title>Election Results</title>
<!-- Bootstrap -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<div class="container" style="width: 650px;">
<div class="row">
<div class="col-lg-12">
<h1 class="text-center">
<div class="row d-flex justify-content-center" style="border:none;background:white;">
<div class="col-md-1 col-3">
<img class="mx-auto d-block img-fluid" src="images/logo.png" style="" alt="">
</div>
</div></h1>
<hr/>
<br/>
<h1 class="text-center">National Election-2075</h1>
<h1 class="text-center">Election Updates</h1>
<div id="loader">
<p class="text-center">Loading...</p>
</div>
<div id="content" style="display: none;">
<table class="table">
<thead>
<tr>
<th scope="col">#</th>
<th scope="col">Name</th>
<th scope="col">Votes</th>
</tr>
</thead>
<tbody id="postcandidatesResults">
</tbody>
</table>
<hr/>
<table class="table">
<thead>
<tr>
<th scope="col">#</th>
<th scope="col">Name</th>
<th scope="col">Votes</th>
</tr>
</thead>
<tbody id="partycandidatesResults">
</tbody>
</table>
<hr/>
<form onSubmit="App.castVote(); return false;">
<div class="form-group">
<label for="postcandidatesSelect">Select Candidate</label>
<select class="form-control" id="postcandidatesSelect">
</select>
</div>
<div class="form-group">
<label for="partycandidatesSelect">Select Candidate</label>
<select class="form-control" id="partycandidatesSelect">
</select>
</div>
<button type="submit" class="btn btn-primary">Vote</button>
<hr />
</form>
<p id="accountAddress" class="text-center"></p>
</div>
</div>
</div>
</div>
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script src="js/bootstrap.min.js"></script>
<script src="js/web3.min.js"></script>
<script src="js/truffle-contract.js"></script>
<script src="js/app.js"></script>
</body>
</html>
Any call to the blockchain is async(returns a promise). You need to either handle the promise with a .then() or you can use async await. Basically anything chained after electionInstance is async. For example:
electionInstance.candidatesCount();
electionInstance.cand_party
electionInstance.voters