Develop Reference

Django with Bootstrap Carousel

My code it's displaying image but not changing the image in the bootstrap carousel when I click the button to pass
{% if variation.extravariationproductpicture_set.all %}
<div id="carouselExampleControls" class="carousel slide" data-ride="carousel">
<div class="carousel-inner">
{% for picture in variation.extravariationproductpicture_set.all %}
<div class="carousel-item {% if forloop.first %} active {% endif %}">
<img class="d-block w-100" src="{{picture.image.url}}" alt="First slide">
</div>
{% endfor %}
</div>
<a class="carousel-control-prev" href="#carouselExampleControls" role="button" data-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" href="#carouselExampleControls" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
{% endif %}

Why does my property description get repeated in loop

So i have a for loop to display the every property in properties, I don't get why my property description gets repeated for every property.
every other output is not repeated only the property description.
{% for property in propertys %}
<div class="listing-item">
<article class="geodir-category-listing fl-wrap">
<div class="geodir-category-img fl-wrap">
<a href="listing/{{ property.id }}" class="geodir-category-img_item">
<img src="{{property.header_image.url}}" style=" max-height: 210px;" alt="{{ property.header_image.url}}">
<div class="overlay"></div>
</a>
<div class="geodir-category-location">
<i class="fas fa-map-marker-alt"></i> {{ property.location }}
</div>
<ul class="list-single-opt_header_cat">
<li>{{ property.list_type }}</li>
<li>{{ property.home_type}}</li>
</ul>
<span><i class="fal fa-heart"></i></span>
<span><i class="fal fa-random"></i></span>
<div class="geodir-category-listing_media-list">
<span><i class="fas fa-camera"></i> 8</span>
</div>
</div>
<div class="geodir-category-content fl-wrap">
<h3>{{ property.name }}</h3>
<div class="geodir-category-content_price">$ {{ property.price }}</div>
<p>{{ property.description }}</p>
<div class="geodir-category-content-details">
<ul>
<li><i class="fal fa-bed"></i><span>{{ property.bedrooms }}</span></li>
<li><i class="fal fa-bath"></i><span>{{ property.total_bathrooms }}</span></li>
<li><i class="fal fa-cube"></i><span>{{ property.lot_size}} ft2</span></li>
</ul>
</div>
<div class="geodir-category-footer fl-wrap">
<img src="{{ property.agent.profilepic.url }}" alt=""><span>By {{ property.agent.first_name }} {{ property.agent.last_name}}</span>
<div class="listing-rating card-popup-rainingvis tolt" data-microtip-position="top" data-tooltip="Good" data-starrating2="3.9"></div>
</div>
</div>
</article>
</div>
{% endfor %}

NoReverseMatch at /listings/ Reverse for 'listing' not found. 'listing' is not a valid view function or pattern name

So I'm getting this error when I visit the page, I'm trying to use paginator and I don't know where i'm wrong, index function handles the page I'm talking about
views.py
def index(request):
listings = Listing.objects.all()
paginator = Paginator(listings, 3)
page = request.GET.get('page')
paged_listings = paginator.get_page(page)
params = {'listings':paged_listings}
return render(request, 'listings/listings.html', params)
def listing(request, listing_id):
return render(request, 'listings/listing.html')
def search(request):
return render(request, 'listings/search.html')
listings.html
{% extends 'base.html' %}
{% block content %}
{% load humanize %}
<!-- Breadcrumb -->
<section id="bc" class="mt-3">
<div class="container">
<nav aria-label="breadcrumb">
<ol class="breadcrumb">
<li class="breadcrumb-item">
<a href="{% url 'index' %}">
<i class="fas fa-home"></i> Home</a>
</li>
<li class="breadcrumb-item active"> Browse Listings</li>
</ol>
</nav>
</div>
</section>
<!-- Listings -->
<section id="listings" class="py-4">
<div class="container">
<div class="row">
{% if listings %}
{% for listing in listings %}
<div class="col-md-6 col-lg-4 mb-4">
<div class="card listing-preview">
<img class="card-img-top" src="{{ listing.photo_main.url }}" alt="">
<div class="card-img-overlay">
<h2>
<span class="badge badge-secondary text-white">${{ listing.price | intcomma}}</span>
</h2>
</div>
<div class="card-body">
<div class="listing-heading text-center">
<h4 class="text-primary">{{ listing.title }}</h4>
<p>
<i class="fas fa-map-marker text-secondary"></i>{{ listing.city }} {{ listing.state }}, {{ listing.zipcode }}</p>
</div>
<hr>
<div class="row py-2 text-secondary">
<div class="col-6">
<i class="fas fa-th-large"></i>Sqfit: {{ listing.sqft }}</div>
<div class="col-6">
<i class="fas fa-car"></i>Garage: {{ listing.garage }}</div>
</div>
<div class="row py-2 text-secondary">
<div class="col-6">
<i class="fas fa-bed"></i>Bedrooms: {{ listing.bedrooms }}</div>
<div class="col-6">
<i class="fas fa-bath"></i>Bathrooms: {{ listing.bathrooms }}</div>
</div>
<hr>
<div class="row py-2 text-secondary">
<div class="col-12">
<i class="fas fa-user"></i>{{ listing.realtor.name }}</div>
</div>
<div class="row text-secondary pb-2">
<div class="col-6">
<i class="fas fa-clock"></i>{{ listing.list_date | timesince }}</div>
</div>
<hr>
More Info
</div>
</div>
</div>
{% endfor %}
{% else %}
<div class="col-md-12">
<p>No Listings Available</p>
</div>
{% endif %}
<!-- Listing 1 -->
</div>
<div class="row">
<div class="col-md-12">
{% if listings.has_other_pages %}
<ul class="pagination">
{% if listings.has_previous %}
<li class="page-item">
«
</li>
{% else %}
<li class="page-item disabled">
<a class="page-link">«</a>
</li>
{% endif %}
</ul>
{% endif %}
{% for i in listings.paginator.page_rage %}
{% if listings.number == i %}
<li class="page-item active">
<a class="page-link">{{ i }}</a>
</li>
{% else %}
<li class="page-item">
{{i}}
</li>
{% endif %}
{% endfor %}
</div>
</div>
</div>
</section>
{% endblock %}
urls.py
from django.urls import path
from . import views
urlpatterns = [
path('', views.index, name="listings"),
path('<int:listing_id>', views.listing, name="=listing"),
path('search', views.search, name="=search"),
]

There's a Typo in your urls.py
Try to use this :-
path('listing/<int:listing_id>/', views.listing, name='listing'),
Where was the typo ?
You were using this :-
path('<int:listing_id>', views.listing, name="=listing"),
----------------------------------------------^

How do I use variables as selectors in HMTL/ Bootstrap4?

I'm trying to make a for loop to build an accordion in Bootstrap, but every time I click the button to expand/ collapse a card, every card expands/ collapses. I think this is due to a shared id across all cards, so I want to use the post title as the id selector for each card. Here is the code I currently have:
{% for post in blog_posts %}
<div id="accordion">
<div class="card">
<h3 class="card-header" id="header">
<button class="btn btn-info" data-toggle="collapse"
data-target="#body" aria-expanded="false"
aria-controls="post: ">
{{ post.title }}
<small><p>Posted by {{ post.author }} on
{{ post.date_added|date:'D M d, Y H:i' }}</p></small>
</button>
</h3>
<div id="body" class="collapse show" aria-labelledby="header"
data-parent="#accordion">
<div class="card-body">
{{ post.text|linebreaks }}
<small>
<a class="text-dark" href="{% url 'blogs:edit_post' post.id %}">
edit post</a>
</small>
</div>
</div>
</div>
{% empty %}
<p>There are no posts to display.</p>
{% endfor %}
I've tried changing the h3 id to {{ post.title }}, but that doesn't seem to work. Any help is much appreciated.

Example code:
https://getbootstrap.com/docs/4.0/components/collapse/#accordion-example
You need the id's to be unique for each accordion section (otherwise they will all open at once), you could use the post.id for that.
{% if blog_posts %}
<div id="accordion">
{% for post in blog_posts %}
<div class="card">
<h3 class="card-header" id="header-{{post.id}}">
<button class="btn btn-info" data-toggle="collapse"
data-target="#post-{{post.id}}" aria-expanded="false"
aria-controls="post-{{post.id}}">
{{ post.title }}
<small><p>Posted by {{ post.author }} on
{{ post.date_added|date:'D M d, Y H:i' }}</p></small>
</button>
</h3>
<div id="post-{{post.id}}" class="collapse show" aria-labelledby="header-{{post.id}}"
data-parent="#accordion">
<div class="card-body">
{{ post.text|linebreaks }}
<small>
<a class="text-dark" href="{% url 'blogs:edit_post' post.id %}">
edit post</a>
</small>
</div>
</div>
{% endfor %}
</div>
{% else %}
<p>There are no posts to display.</p>
{% endif %}

Django/Bootstrap 4: How to align elements inside of multiple parent divs

So I am developing a website and for the life of me I can't figure out how to align the description, price, stock and add cart button in multiple versions of the same <div>. I know it is to do with the size of the image I am using but I'm not sure how to fix this.
Here is a diagram of how I want it to look:
But when I apply a 'h-100' class to the card <div> this is what happens:
I want the images to keep their positions but for the descriptions, add cart button and price/stock to all be horizontally aligned, as well as the height of the overall cards to be the same.
Here is my Django template code:
{% extends 'base.html' %}
{% block content %}
<div class="container-fluid">
<div class="jumbotron">
<h2>Welcome to MyTea</h4>
<p>Here we have teas of all varieties from all around the globe</p>
</div>
<div class="row">
<div class="col-sm-3">
<h4>Categories</h4>
<ul class="list-group">
All Categories
{% for c in countcat %}
<a href="{{ c.get_absolute_url }}" class="list-group-item catheight">{{c.name}}
<span class="badge badge-light">{{c.num_products}}</span>
</a>
{% endfor %}
</ul>
</div>
<div class="col-sm-9">
{% for product in products %}
{% if forloop.first %}<div class="row">{% endif %}
<div class="col-sm-6">
<div class="card border-primary mt-3 h-100">
<div class="card-header"><h3>{{product.name}}</h3></div>
<div class="card-body">
{% if product.image %}
<div class="h">
<img src="{{product.image.url}}" class="img-fluid">
</div>
{% endif %}
<p class="bg-light font-weight-light ">{{product.description}}</p>
{% if product.stock > 0 %}
<a href="{% url 'add_cart' product.id %}" type="button" class="btn btn-primary btn-sm mb-2">
<p class="m-0">Add to cart</p>
</a>
{% else %}
<a href="#" type="button "class="btn btn-danger btn-sm mb-2">
<p class="m-0">Out of stock</p>
</a>
{% endif %}
<div class="card-footer">
<p>Price: €{{product.price}}</p>
<p>Stock left: {{product.stock}}</p>
</div>
</div>
</div>
</div>
{% endfor %}
</div>
</div>
</div>
{% endblock content %}
Thanks for any help

The code can be corrected with a simple re-alignment of the content inside .card and correctly closing </div> statements.
Remove {% if forloop.first %}<div class="row">{% endif %} statement and place <div class="row"> above the for loop.
Add to cart and Out of stock buttons should be placed inside .card-footer and .card-body should be closed appropriately. This will leave the image and description within .card-body
Make sure h-100 class is added to `.card'.
Might I suggest adding end of div comments to all the div statements. The code is readable better in this way and helps in mitigating missing or misplaced </div> statements.
{% extends 'base.html' %}
{% block content %}
<div class="container-fluid">
<div class="jumbotron">
<h2>Welcome to MyTea</h4>
<p>Here we have teas of all varieties from all around the globe</p>
</div>
<!-- .jumbotron -->
<div class="row">
<div class="col-sm-3">
<h4>Categories</h4>
<ul class="list-group">
All Categories
{% for c in countcat %}
<a href="{{ c.get_absolute_url }}" class="list-group-item catheight">{{c.name}}
<span class="badge badge-light">{{c.num_products}}</span>
</a>
{% endfor %}
</ul>
</div>
<!-- .col-sm-3 -->
<div class="col-sm-9">
<div class="row">
{% for product in products %}
<div class="col-sm-6">
<div class="card border-primary mt-3 h-100">
<div class="card-header">
<h3>{{product.name}}</h3>
</div>
<!-- .card-header -->
<div class="card-body">
{% if product.image %}
<div class="h">
<img src="{{product.image.url}}" class="img-fluid">
</div>
<!-- .h -->
{% endif %}
<p class="bg-light font-weight-light ">{{product.description}}</p>
</div>
<!-- .card-body -->
<div class="card-footer">
{% if product.stock > 0 %}
<a href="{% url 'add_cart' product.id %}" type="button" class="btn btn-primary btn-sm mb-2">
<p class="m-0">Add to cart</p>
</a>
{% else %}
<a href="#" type="button " class="btn btn-danger btn-sm mb-2">
<p class="m-0">Out of stock</p>
</a>
{% endif %}
<p>Price: €{{product.price}}</p>
<p>Stock left: {{product.stock}}</p>
</div>
<!-- .card-footer -->
</div>
<!-- .card -->
</div>
<!-- . col-sm-6 -->
{% endfor %}
</div>
<!-- .row -->
</div>
<!-- .col-sm-9 -->
</div>
<!-- .row -->
</div>
<!-- .container-fluid -->
{% endblock content %}