Как получить выбранное значение из опции select в моем шаблоне? Django

views.py:

def add(request):
categories = Category.objects.all()
current_user = request.user
owner = current_user
if request.method == "POST":
    isActive = True
    img = "ASS"
    title = request.POST["title"]
    description = request.POST["description"]
    price = request.POST["price"]
    category = request.POST["categories_n"]  

    f = Listing(title,description, img, price, isActive=True, owner = owner, category)
    f.save()
context = {'owner': owner, "categories":categories}
return render(request, "auctions/add.html", context)

Шаблон:

{% block body %}
    <div class ="main">
        <form action = "{% url 'add' %}" method = "POST">
            {% csrf_token %}
            <h3>Owner of the item: <strong>{{owner}}</strong></h3>
            <ul class = "u_list">
            <li class = "l_item"><label for = "t">Title:</label> <input type = "text" name = "title"  id = "t" placeholder = "Item's name"></li>
            <li class = "l_item"><label for = "d">Description: </label><input type = "text", name = "description" id = "d" placeholder = "Details about the item"></li>
            <li class = "l_item"><label for = "p">Price: </label> <input type = "price" name = "price" id = "p" placeholder = "Item's price"></li>
            <select name = "categories_n" id = "c">
                {% for option in categories %}
                <option value = "{{option.id}}" {% if categories_n == option.name %} selected = "selected"{% endif %}>
                    {{option}}
                </option>
                {% endfor %}
            </select>
            <input type = "submit" value = "Submit">
        </ul>
    </form>
</div>
{% endblock body %}

Как получить опцию из моего шаблона? Что я должен сделать, чтобы получить выбранную опцию? Я не знаю, почему я не использовал Django Forms.

Версия Django: 4.1.4; Python: 3.10.5;

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