Attribute Error: 'QuerySet' object has no attribute 'name'

in my Django project, I have a list of items where users specify categories while submitting "Crate New Item" form. The default route shows this list of items with the title, description and category of the item. Users can click on each category to be redirected to that related category’s page where I’m trying to display all items under that category.

To do that, I want to check if the category submitted in the form is already in our Category database. If yes, the item should be added under the existing category’s page and if not, a new category should be created.

However, I get an attribute error while trying to check that in form submission and I’m stuck. Would appreciate any help.

AttributeError at /create
'QuerySet' object has no attribute 'name'
error line :  if category == all_categories.name: 

models.py:

class User(AbstractUser):
    pass

class Category(models.Model):
    name = models.CharField(max_length = 64, null = True)


class AuctionItem(models.Model):
    user = models.ForeignKey(User, on_delete = models.CASCADE, related_name = "created_by")
    title = models.CharField(max_length = 64)
    description = models.TextField()
    price = models.DecimalField(max_digits = 100 ,decimal_places = 2)
    image = models.URLField(blank = True)
    category = models.ForeignKey(Category, on_delete = models.CASCADE, related_name = "item_category")
    date = models.DateTimeField(auto_now_add = True)

urls.py:

urlpatterns = [
    path("", views.index, name="index"),
    path("login", views.login_view, name="login"),
    path("logout", views.logout_view, name="logout"),
    path("register", views.register, name="register"),
    path("create", views.create_listing, name="create"),
    path("listing/<int:listing_id>", views.listing, name = "listing"),
    path("<str:user>/watchlist", views.watchlist, name= "watchlist"),
    path("closed", views.closed, name = "closed"),
    path("category/<int:category_id>", views.category, name = "category")
]

views.py:

@login_required 
def create_listing(request):
    if request.method == "POST": #if the create listing form is submitted
        title = request.POST["title"] #get the provided title
        description = request.POST["description"] #get the provided description
        price = request.POST["price"] #get the provided price
        image = request.POST["image"] #get the provided image
        category = request.POST["category"] #get the provided category
    
        all_categories = Category.objects.filter(name = category)
    
        if category == all_categories.name:
            item = AuctionItem.objects.create( #create new auction item with given properties
                user = request.user,
                title = title,
                description = description,
                price = price,
                image = image,
                category = category
            )
        else:
            new_category = Category.objects.create(name = category)
            item = AuctionItem.objects.create( #create new auction item with given properties
                user = request.user,
                title = title,
                description = description,
                price = price,
                image = image,
                category = new_category
            )

        return HttpResponseRedirect(reverse("index")) #after submitting the form, redirect user to the main page

    return render(request, "auctions/create_listing.html")

def category(request, category_id):
    category = Category.objects.get(id=category_id)
    items = AuctionItem.objects.filter(category=category)
    return render(request, "auctions/category.html", {
        "items" : items,
        "name" : category.name
    })

category.html:

{% extends "auctions/layout.html" %}

{% block body %}
    <h2>Category: {{name}}</h2>
    {% for item in items %}
    <div class = "frame">
        {% if item.image %}
            <img src="{{item.image}}" style= "width: 15vw;">
        {% endif %}
        {% if user.is_authenticated %}
        <h4><a href="{% url 'listing' item.id %}">{{item.title}}</a></h4>
        {% else %}
        <h4>{{item.title}}</h4>
        {% endif %}
        <br>
        <div id="text"><strong>Starting Price:</strong> ${{item.price}}</div>
        <div id="text"><strong>Description:</strong> {{item.description}}</div>
        {% if item.category %}
        <div id="text"><strong>Category: </strong><a href="{% url 'category' item.category.id %}">{{ item.category.name }}</a></div>
        {% endif %}
        <br>
        <div id="created">Created by {{item.user}}, on {{item.date}}</div>
    </div>
    {% endfor %}

{% endblock %}