Django如何根据输入选择不同的表？

from django.db import models

class Category(models.Model):
    name = models.CharField(max_length=100)

    def __str__(self):
        return self.name

class Product(models.Model):
    name = models.CharField(max_length=100)
    category = models.ForeignKey(Category, on_delete=models.CASCADE)

    def __str__(self):
        return self.name

from django.shortcuts import render
from .models import Category, Product

def choose_table(request):
    category_id = request.GET.get('category_id')
    if category_id:
        products = Product.objects.filter(category_id=category_id)
    else:
        products = Product.objects.all()

    categories = Category.objects.all()

    return render(request, 'choose_table.html', {'products': products, 'categories': categories})

{% for product in products %}
    <p>{{ product.name }}</p>
{% endfor %}

<form method="GET" action="{% url 'choose_table' %}">
    <select name="category_id">
        <option value="">All</option>
        {% for category in categories %}
            <option value="{{ category.id }}">{{ category.name }}</option>
        {% endfor %}
    </select>
    <input type="submit" value="Submit">
</form>