Python Django列出属于一个类别的所有帖子

from django.db import models

class Post(models.Model):
    title = models.CharField(max_length=200)
    content = models.TextField()
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.title

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

    def __str__(self):
        return self.name

class Post(models.Model):
    title = models.CharField(max_length=200)
    content = models.TextField()
    created_at = models.DateTimeField(auto_now_add=True)
    category = models.ForeignKey(Category, on_delete=models.CASCADE)

    def __str__(self):
        return self.title

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

def posts_by_category(request, category_id):
    category = Category.objects.get(id=category_id)
    posts = Post.objects.filter(category=category)
    return render(request, 'posts_by_category.html', {'category': category, 'posts': posts})