如何在我的django博客中添加类别

class Category(models.Model):
    title = models.CharField(max_length=255,verbose_name="Title")
    ...


class Post(models.Model):
    category = models.ForeignKey(Category,verbose_name="Category")
    title = models.CharField(max_length=255,verbose_name="Title")
    text = models.TextField()
    ...

当你有这样的帖子时：

post = Post.objects.first()

您可以使用post.category.title访问它的类别标题,或者当您有类似这样的类别时：

category = Category.objects.first()

您可以使用category.post_set.all()获取该类别下的帖子.

我编辑了你的代码,以显示我是如何编写的,如果这是我正在进行的项目.这里是：

models.py

from django.db import models
from django.utils import timezone 

class Category(models.Model):
    created_at = models.DateTimeField(auto_now_add=True,verbose_name="Created at")
    updated_at = models.DateTimeField(auto_now=True,verbose_name="Updated at")
    title = models.CharField(max_length=255,verbose_name="Title")

    class Meta:
        verbose_name = "Category"
        verbose_name_plural = "Categories"
        ordering = ['title']

    def __str__(self):
        return self.title

class Post(models.Model):
    created_at = models.DateTimeField(auto_now_add=True,verbose_name="Updated at")
    is_published = models.BooleanField(default=False,verbose_name="Is published?")
    published_at = models.DateTimeField(null=True,blank=True,editable=False,verbose_name="Published at")
    category = models.ForeignKey(Category,verbose_name="Category")
    author = models.ForeignKey('auth.User',verbose_name="Author")
    title = models.CharField(max_length=200,verbose_name="Title")
    text = models.TextField(verbose_name="Text")

    class Meta:
        verbose_name = "Post"
        verbose_name_plural = "Posts"
        ordering = ['-created_at']

    def publish(self):
        self.is_published = True
        self.published_at = timezone.now()
        self.save()

    def __str__(self):
        return self.title

views.py

from django.shortcuts import render,get_object_or_404
from django.utils import timezone
from .models import Category,Post

def category_list(request):
    categories = Category.objects.all() # this will get all categories,you can do some filtering if you need (e.g. excluding categories without posts in it)

    return render (request,'blog/category_list.html',{'categories': categories}) # blog/category_list.html should be the template that categories are listed.

def category_detail(request,pk):
    category = get_object_or_404(Category,pk=pk)

    return render(request,'blog/category_detail.html',{'category': category}) # in this template,you will have access to category and posts under that category by (category.post_set).

def post_list(request):
    posts =  Post.objects.filter(published_at__lte=timezone.now()).order_by('published_at')

    return render(request,{'post': post})

urls.py

from django.conf.urls import include,url
from . import views

urlpatterns = [
    url(r'^category$',views.category_list,name='category_list'),url(r'^category/(?P<pk>d+)/$',views.category_detail,name='category_detail'),url(r'^$',]

我没有写模板,他们取决于你.