如何在Django中根据下拉选择的值来获取数据库数据？

from django.db import models

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

    def __str__(self):
        return self.name

python manage.py makemigrations
python manage.py migrate

from django import forms
from .models import Category

class CategoryForm(forms.Form):
    category = forms.ModelChoiceField(queryset=Category.objects.all())

from django.shortcuts import render
from .forms import CategoryForm
from .models import Category

def get_data(request):
    if request.method == 'POST':
        form = CategoryForm(request.POST)
        if form.is_valid():
            selected_category = form.cleaned_data['category']
            data = Category.objects.filter(name=selected_category)
            return render(request, 'result.html', {'data': data})
    else:
        form = CategoryForm()
    return render(request, 'form.html', {'form': form})

<form method="post">
  {% csrf_token %}
  {{ form }}
  <button type="submit">查询</button>
</form>

{% for item in data %}
  {{ item.name }}
{% empty %}
  <p>没有找到相关数据。</p>
{% endfor %}

from django.urls import path
from .views import get_data

urlpatterns = [
    path('get-data/', get_data, name='get_data'),
]