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I am working with a template in django trying to dispaly a specific number of random items from an array of related objects

for now i display all items in the array what changes can i make

 {% for pdt in object.pdt_set.all %} <div class="ps-product ps-product--simple"> <div class="ps-product__thumbnail"> <a href="{% url 'pdtdetail' pdt.id %}"><img src="{{ pdt.image.ur }}"alt=""></a> <div class="ps-product__badge">-16%</div> <ul class="ps-product__actions"> <li><a href="#" data-toggle="tooltip" data-placement="top" title="Read More"><i class="icon-bag2"></i></a></li> <li><a href="#" data-placement="top" title="Quick View" data-toggle="modal" data-target="#product-quickview"><i class="icon-eye"></i></a></li> <li><a href="#" data-toggle="tooltip" data-placement="top" title="Add to Whishlist"><i class="icon-heart"></i></a></li> <li><a href="#" data-toggle="tooltip" data-placement="top" title="Compare"><i class="icon-chart-bars"></i></a></li> </ul> </div> <div class="ps-product__container"> <div class="ps-product__content" data-mh="garden"><a class="ps-product__title" href="product-default.html">{{ pdt.name }}</a> <div class="ps-product__rating"> <select class="ps-rating" data-read-only="true"> <option value="1">1</option> <option value="1">2</option> <option value="1">3</option> <option value="1">4</option> <option value="2">5</option> </select><span>01</span> </div> <p class="ps-product__price sale">$ {{ pdt.price }} </p> </div> </div> </div> {% endfor %}
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1 Answer 1

Reset to default
1

Since you are using this queryset: {% for pdt in object.pdt_set.all %}

All you have to do is randomize it and limit how many results you select

{% for pdt in object.pdt_set.order_by('?').limit(5) %}

or

{% for pdt in object.pdt_set.order_by('?')[:5] %}

Replace 5 with however many records you want

See:

How to pull a random record using Django's ORM?

Django - limiting query results

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4 Comments

okay but according to those posts they say it is slow what's your take ? @AayushAgrawal
There's an old principle in programming - 'It's better to ask for forgiveness than to ask for permission' Try it. If it feels slow, don't use it. This will only be slow if pdt_set has millions or billions of records, and i have a feeling that is probably not the case here :)
been getting Could not parse the remainder: '('?')[:5]' errors any idea
@JordanRob That's caused by Jinja2 trying to prevent function execution. If you pass the entire variable object.pdt_set.order_by('?')[:5] from the View instead of evaluating in the template it should fix the problem

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