Develop Reference

infinite scroll working but not doing things as it should

in my web site i want to show the user ratings for that i used the infinite scroll but i am facing one problem.
when it first loads the data before calling the <a class="infinite-more-link" href="?page={{ ratings.next_page_number }}"></a> it is showing the star with the count of vote,but when after calling the <a class="infinite-more-link" href="?page={{ ratings.next_page_number }}"></a> it is not showing the star.
my views.py
#login_required
def ratings_user(request,pk):
ratings = VoteUser.objects.filter(the_user_id=pk).order_by('-pk')
paginator = Paginator(ratings, 1)
page = request.GET.get('page')
try:
posts = paginator.page(page)
except PageNotAnInteger:
posts = paginator.page(1)
except EmptyPage:
posts = paginator.page(paginator.num_pages)
return render(request,request.session['is_mobile']+'profile/ratings.html',{'ratings':posts})
html
{% extends 'mobile/profile/base.html' %}
{% load static %}
{% load crispy_forms_tags %}
{% load get_companion %}
{% load cache %}
{% block title %}
Ratings
{% endblock %}
{% block leftcontent %}
<link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.9.0/css/all.min.css" rel="stylesheet">
{% endblock %}
{% block middlecontent %}
<div class="infinite-container">
{% for i in ratings %}
<div class="infinite-item">
<div class="w3-container w3-card w3-white w3-round w3-margin">
<img src="{{ i.the_user.profile.avatar.url }}" alt="Avatar" class="w3-left w3-circle w3-margin-right" style="width:40px;height:40px;border-radius:50%;">
{% with user=i.the_user.profile %}{{ user.prenom|title|truncatewords:2 }} {{ user.nom|title|truncatewords:1 }}{% endwith %}
<br>
<span class="stars" data-rating="{{ i.vote.vote }}" data-num-stars="5" ></span>
<hr class="w3-clear">
<p>
{{ i.commentaire|linebreaksbr }}
</p>
<span class="glyphicon glyphicon-user"></span> {% with user=i.the_sender.profile %}{{ user.prenom|title|truncatewords:2 }} {{ user.nom|title|truncatewords:1 }}{% endwith %}
</div>
</div>
{% endfor %}
</div>
{% if ratings.has_next %}
<a class="infinite-more-link" href="?page={{ ratings.next_page_number }}"></a>
{% endif %}
{% endblock %}
{% block rightcontent %}
{% endblock %}
{% block js %}
<script>
var infinite = new Waypoint.Infinite({
element: $('.infinite-container')[0]
});
</script>
<script>
//ES5
$.fn.stars = function() {
return $(this).each(function() {
var rating = $(this).data("rating");
var fullStar = new Array(Math.floor(rating + 1)).join('<i class="fas fa-star"></i>');
var halfStar = ((rating%1) !== 0) ? '<i class="fas fa-star-half-alt"></i>': '';
var noStar = new Array(Math.floor($(this).data("numStars") + 1 - rating)).join('<i class="far fa-star"></i>');
$(this).html(fullStar + halfStar + noStar);
});
}
//ES6
$.fn.stars = function() {
return $(this).each(function() {
const rating = $(this).data("rating");
const numStars = $(this).data("numStars");
const fullStar = '<i class="fas fa-star"></i>'.repeat(Math.floor(rating));
const halfStar = (rating%1!== 0) ? '<i class="fas fa-star-half-alt"></i>': '';
const noStar = '<i class="far fa-star"></i>'.repeat(Math.floor(numStars-rating));
$(this).html(`${fullStar}${halfStar}${noStar}`);
});
}
</script>
<script>
$(function(){
$('.stars').stars();
});
</script>
{% endblock %}
i have tried to put the <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.9.0/css/all.min.css" rel="stylesheet"> inside the class="infinite-item" but it does not help.what might be the reason for that ? Thanks.

It doesn't look like .stars() will look for new elements being added to the DOM. You should look for a callback function configuration option within Waypoint.Infinite that you can call .stars() on the new elements.

Django-bootstrap-datepicker-plus is not rendering datepicker properly

I am facing with the problem that my datetimepicker is not loading at all.
Just in my template, the datetime field loads the current date and time when i press the calendar icon as the image shows.
Despite following the installation steps from here : https://pypi.org/project/django-bootstrap-datepicker-plus/ and checking other answers in stackoverflow i did not manage to find the solution.
I think the problem has to do with the imports and their priority.
my template
{% extends 'base.html' %}
{% load render_table from django_tables2 %}
{% load bootstrap4 %}
{% bootstrap_css %}
{% bootstrap_javascript jquery='full' %}
{% block page-title %}Creation of Process Note{% endblock %}
{% block content %}
<div class="row">
<div class="col-md-6 col-xl-6 offset-md-3">
<form class="well" method="post" action="">
{% csrf_token %}
{% bootstrap_form form %}
<br>
{% buttons %}
<button type="submit" class="btn btn-primary">
Submit
</button>
{% endbuttons %}
</form>
{{ form.media }}
</div>
</div>
{% endblock %}
in settings.py
BOOTSTRAP4 = {
'include_jquery': True,
}
In my base.html the appearence of the imports is:
Inside head
<link href="/static/theme/assets/css/bootstrap.min.css" rel="stylesheet" type="text/css">
<script src="/static/theme/assets/js/jquery.min.js"></script>
...
Inside footer
<script src="/static/theme/assets/js/bootstrap.bundle.min.js"></script>
...
my model
class Case_Notes(models.Model):
date_created = models.DateTimeField("Creation Date", null=True,blank=True, default=datetime.datetime.now)
date = models.DateTimeField("Appointment Date", null=True,blank=True)
notes = models.CharField("Notes",max_length=500, blank=True, null=True)
def __str__(self):
return self.notes
my form
class ProcessNotesForm(ModelForm):
notes= CharField(required=False,widget=Textarea(attrs={"rows":5, "cols":20}))
class Meta:
model = Case_Notes
fields = ("date","notes",)
widgets = {
'date': DateTimePickerInput(), # default date-format %m/%d/%Y will be used
}
Why datepicker widget in the form field is not rendering?

According to the documentation, the {{ form.media }} needs to follow right under the {% bootstrap_javascript jquery='full' %} in your template file.
{% load bootstrap4 %}
{% bootstrap_css %}
{% bootstrap_javascript jquery='full' %}
{{ form.media }}

Addition to {{ form.media }} you use tuple instead of an array in the fields Meta in the ModelForm:
class ProcessNotesForm(ModelForm):
notes= CharField(required=False,widget=Textarea(attrs={"rows":5, "cols":20}))
class Meta:
model = Case_Notes
fields = ["date", "notes" ] # change this ("date","notes",)
widgets = {
'date': DateTimePickerInput(), # default date-format %m/%d/%Y will be used
}

Django 1.10 - Ajax - order of operations?

I am using Ajax with Django 1.10 to implement a like functionality ( a user likes an image posted by another user) on my website. I have the following code :
The views file :
#ajax_required
#login_required
#require_POST
def image_like(request):
image_id = request.POST.get('id')
action = request.POST.get('action')
if image_id and action:
try:
image = Image.objects.get(id=image_id)
if action == 'like':
image.users_like.add(request.user)
else:
image.users_like.remove(request.user)
return JsonResponse({'status':'ok'})
except:
pass
return JsonResponse({'status':'ko'})
def image_detail(request, id, slug):
image = get_object_or_404(Image, id=id, slug=slug)
return render(request,
'images/image/detail.html',
{'section': 'images',
'image': image})
In base.html :
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<script src=" http://cdn.jsdelivr.net/jquery.cookie/1.4.1/jquery.cookie.min.js "></script>
<script>
var csrftoken = $.cookie('csrftoken');
function csrfSafeMethod(method) {
// these HTTP methods do not require CSRF protection
return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
}
$.ajaxSetup({
beforeSend: function(xhr, settings) {
if (!csrfSafeMethod(settings.type) && !this.crossDomain) {
xhr.setRequestHeader("X-CSRFToken", csrftoken);
}
}
});
$(document).ready(function(){
{% block domready %}
{% endblock %}
});
</script>
And finnaly in the detail.html :
{% extends "base.html" %}
{% block title %}{{ image.title }}{% endblock %}
{% block content %}
...
{% with total_likes=image.users_like.count users_like=image.users_like.all %}
<div class="image-info">
<div>
<span class="count">
<span class="total">{{ total_likes }}</span>
like{{ total_likes|pluralize }}
</span>
<a href="#" data-id="{{ image.id }}" data-action="{% if request.user in users_like %}un{% endif %}like" class="like button">
{% if request.user not in users_like %}
Like
{% else %}
Unlike
{% endif %}
</a>
</div>
{{ image.description|linebreaks }}
</div>
<p> Image liked by :</p>
<div class="image-likes">
{% for user in image.users_like.all %}
<div>
<p>{{ user.last_name }}</p>
</div>
{% empty %}
Nobody likes this image yet.
{% endfor %}
</div>
{% endwith %}
{% endblock %}
{% block domready %}
$('a.like').click(function(e){
e.preventDefault();
$.post('{% url "images:like" %}',
{
id: $(this).data('id'),
action: $(this).data('action')
},
function(data){
if (data['status'] == 'ok')
{
var previous_action = $('a.like').data('action');
// toggle data-action
$('a.like').data('action', previous_action == 'like' ?
'unlike' : 'like');
// toggle link text
$('a.like').text(previous_action == 'like' ? 'Unlike' :
'Like');// update total likes
var previous_likes = parseInt($('span.count .total').text());
$('span.count .total').text(previous_action == 'like' ?
previous_likes + 1 : previous_likes - 1);
}
}
);
});
{% endblock %}
While I mostly understand the code itself, I need help understanding in what orders the requests, the callback functions and everything else is executed ... something like : ,users clicks the like button, that information is passed to the server , it is being manipulated, data-base modified , sent back, the page changes ...
Tell me if any extra code ( models, urls etc. ) is needed. Could't post everything.

Django: Jquery click function not working in Ajax

I have been working through the Tango with Django exercises to cut my teeth into Django. Almost done but having a problem with the Ajax part.
Ajax function to auto_add a page is not being called. Idk what the problem is since the other functions are being called.
On the shell prompt, there is no call to the ajax function at all. Help needed.
Pertinent code attached. It is the same as on the website link above.
static/rango-ajax.js
$('.rango-add').click(function(){
var catid = $(this).attr("data-catid");
var title = $(this).atrr("data-title");
var url = $(this).attr("data-url");
$.get('/rango/auto_add_page/', {category_id: catid, url: url, title: title}, function(data){
$('#pages').html(data);
me.hide();
});
});
templates/rango/category.html
{% if user.is_authenticated %}
<button data-catid="{{category.id}}" data-title="{{ result.title }}" data-url="{{ result.link }}" class="rango-add btn btn-mini btn-info" type="button">Add</button>
{% endif %}
rango/views.py
#login_required
def auto_add_page(request):
context = RequestContext(request)
cat_id = None
url = None
title = None
context_dict = {}
if request.method == 'GET':
cat_id = request.GET['category_id']
url = request.GET['url']
title = request.GET['title']
if cat_id:
category = Category.objects.get(id=int(cat_id))
p = Page.objects.get_or_create(category=category, title=title, url=url)
pages = Page.objects.filter(category=category).order_by('-views')
#Adds our results list to the template context under name pages.
context_dict['pages'] = pages
return render_to_response('rango/page_list.html', context_dict, context)
rango/urls.py
urlpatterns = patterns('',
url(r'^$', views.index, name='index'),
url(r'^goto/$', views.track_url, name='track_url'),
url(r'^add_category/$', views.add_category, name='add_category'),
url(r'^auto_add_page/$', views.auto_add_page, name='auto_add_page'),
Complete code is at this link.

your code is good, the only thing what you have to do is to define your template in /tango/templates/rango/page_list.html. This template have the following code:
{% if pages %}
<ul>
{% for page in pages %}
<li>
{{ page.title}}
{% if page.views > 1 %}
({{page.views}} views)
{% elif page.views == 1 %}
({{page.views}} view)
{% endif %}
</li>
{% endfor %}
</ul>
{% else %}
<strong> No Pages currently in category. </strong>
{% endif %}
And inside of your category template you must define the following code:
% if category %}
{% if user.is_authenticated %}
Add a new Page <br>
{% endif %}
{% if pages %}
<div id="pages">
<ul>
{% for page in pages %}
<li>
{{ page.title}}
{% if page.views > 1 %}
({{page.views}} views)
{% elif page.views == 1 %}
({{page.views}} view)
{% endif %}
</li>
{% endfor %}
</ul>
</div>
{% else %}
<strong> No Pages currently in category. </strong>
{% endif %}
{% else %}
The specified category {{ category_name }} does not exist!
{% endif %}

I'm working through this section of the tutorial now and just want to add to Héctor's answer. To avoid duplicating the code to display the list of pages I did the following:
I added a get_page_list() method to tango/rango/templatetags/rango_extras.py, similar to the get_category_list() method used to display a list of categories in an earlier section of the tutorial.
from rango.models import Page
#register.inclusion_tag("rango/page_list.html")
def get_page_list(category):
pages = Page.objects.filter(category=category) if category else []
return {'pages': pages}
Then we just need to load rango_extras and call the get_page_list() method in tango/templates/rango/category.html.
{% extends 'rango/base.html' %}
{% load rango_extras %}
<!-- Existing code -->
{% if category %}
<!-- Existing code to show category likes and like button -->
<div id="page_list">
{% get_page_list category %}
</div>
<!-- Existing code to show search if user is authenticated -->
{% else %]
The specified category {{ category_name }} does not exist!
{% endif %}
This allows you to display the list of pages when a category page is first loaded and then refresh it if a category is added from the search area, without having to duplicate any code.

Django Infinite scroll using Django Paginate repeating the queryset

Intro: I am using the the below link to add infinite scroll to my project https://simpleisbetterthancomplex.com/tutorial/2017/03/13/how-to-create-infinite-scroll-with-django.html
below is the github code for that link
https://github.com/sibtc/simple-infinite-scroll
The link shows how to add infinite scroll to both function based views and class based views. I have added this to my function based view and it works perfect.
The problem: I have 8 posts in my post-list which is a class-based view. After I add paginate_by = 3 I can only see 3 posts of the 8 posts. Everytime I scroll down these 3 posts keep repeating in an infinite loop
My Views:
class Postlist(SelectRelatedMixin, ListView):
model = Post
select_related = ('user', 'group')
paginate_by = 3
context_object_name = 'post_list'
template_name = 'posts/post_list.html'
def get_queryset(self):
queryset = super(Postlist, self).get_queryset().order_by('-created_at')
query = self.request.GET.get('q')
if query:
queryset = queryset.filter(
Q(title__icontains=query)|
Q(user__username__iexact=query)|
Q(user__first_name__iexact=query)|
Q(user__last_name__iexact=query)
)
return queryset
My Base.html: (I have the below files in JS folder they worked for my FBV)
<script src="{% static 'js/jquery-3.1.1.min.js' %}"></script>
<script src="{% static 'js/jquery.waypoints.min.js' %}"></script>
<script src="{% static 'js/infinite.min.js' %}"></script>
{% block javascript %}{% endblock %}
My post_list.html:
<div class="col-md-8">
<div class="infinite-container">
{% for post in post_list %}
<div class="infinite-item">
{% include "posts/_post.html" %} <!---This code is good---->
</div>
{% empty %}
some code
{% endfor %}
</div>
<div class="loading" style="display: none;">
Loading...
</div>
{% if page_obj.has_next %}
<a class="infinite-more-link" href="?page={{ post_list.next_page_number }}">More</a>
{% endif %}
</div>
{% block javascript %}
<script>
var infinite = new Waypoint.Infinite({
element: $('.infinite-container')[0],
onBeforePageLoad: function () {
$('.loading').show();
},
onAfterPageLoad: function ($items) {
$('.loading').hide();
}
});
</script>
{% endblock %}

In the templates I replaced post_list with page_obj see below code. That did it
{% if post_list.has_next %}
<a class="infinite-more-link" href="?page={{page_obj.next_page_number }}">More</a>
{% endif %}