Adding Post request to Template

Helloo Teckiys, 

I am trying to fix the add to cart and single item remove from the cart and I am trying to fix the template to accommodate the views.py

I am trying to add the code that sends a POST request with form data to the add to cart view and single item remove from the cart but I am not getting the same error which is indicating that the order_item.variation.add(*item_var) does nothing

here is the view.py 

@login_required
def add_to_cart(request, slug):
    item = get_object_or_404(Item, slug=slug)
    order_item_qs = OrderItem.objects.filter(
        item=item,
        user=request.user,
        ordered=False
    )
    item_var = []  # item variation
    if request.method == 'POST':
        for items in request.POST:
            key = items
            val = request.POST[key]
            try:
                v = Variation.objects.get(
                    item=item,
                    category__iexact=key,
                    title__iexact=val
                )
                item_var.append(v)
            except:
                pass

        if len(item_var) > 0:
            for items in item_var:
                order_item_qs = order_item_qs.filter(
                    variation__exact=items,
                )

    if order_item_qs.exists():
        order_item = order_item_qs.first()
        order_item.quantity += 1
        order_item.save()
    else:
        order_item = OrderItem.objects.create(
            item=item,
            user=request.user,
            ordered=False
        )
        order_item.variation.add(*item_var)
        order_item.save()

    order_qs = Order.objects.filter(user=request.user, ordered=False)
    if order_qs.exists():
        order = order_qs[0]
        # check if the order item is in the order
        if not order.items.filter(item__id=order_item.id).exists():
            order.items.add(order_item)
            messages.info(request, "This item quantity was updated.")
            return redirect("core:order-summary")
    else:
        ordered_date = timezone.now()
        order = Order.objects.create(
            user=request.user, ordered_date=ordered_date)
        order.items.add(order_item)
        messages.info(request, "This item was added to cart.")
        return redirect("core:order-summary")


@login_required
def remove_single_item_from_cart(request, slug):
    item = get_object_or_404(Item, slug=slug)
    order_qs = Order.objects.filter(
        user=request.user,
        ordered=False
    )
    if order_qs.exists():
        order = order_qs[0]
        # check if the order item is in the order
        if order.items.filter(item__slug=item.slug).exists():
            order_item = OrderItem.objects.filter(
                item=item,
                user=request.user,
                ordered=False
            )[0]
            if order_item.quantity > 1:
                order_item.quantity -= 1
                order_item.save()
            else:
                order.items.remove(order_item)
            messages.info(request, "This item quantity was updated")
            return redirect("core:order-summary")
        else:
            messages.info(request, "This item was not in your cart")
            return redirect("core:product", slug=slug)
    else:
        messages.info(request, "You do not have an active order")
        return redirect("core:product", slug=slug)

here is the template which I am failing to add a form request 

        <h2> Order Summary</h2>
        <table class="table">
            <thead>
            <tr>
                <th scope="col">#</th>
                <th scope="col">Item Title</th>
                <th scope="col">Price</th>
                <th scope="col">Quantity</th>
                <th scope="col">Size</th> 
                <th scope="col">Total Item Price</th>
            </tr>
            </thead>
            <tbody>
            {% for order_item in object.items.all %}
            <tr>
                <th scope="row">{{ forloop.counter }}</th>
                <td>{{ order_item.item.title }}</td>
                <td>{{ order_item.item.price }}</td>
                <td>
                
<----------------------------------The error is in this section---------------------------->
<------------I am trying to add a post request to remove-single-item-from-cart------------->

<a href="{% url 'core:remove-single-item-from-cart' order_item.item.slug %}"><i class="fas fa-minus mr-2"></a></i>
                {{ order_item.quantity }}

<--------------------I am trying to add a post request to add to cart---------------------->

<a href="{% url 'core:add-to-cart' order_item.item.slug %}"><i class="fas fa-plus ml-2"></a></i>
                </td>  

<------------------------------------------------------------------------------------------>
              
                <td>
                {% if order_item.variation.all %}
                {% for variation in order_item.variation.all %}
                {{ variation.title|capfirst }}
                {% endfor %}
                {% endif %}
                </td>