我决定删除这个项目，重新开始，但这次我用类视图而不是函数视图。我不知道为什么它不能运行，但使用类视图它工作起来像一个魅力。因此，在类视图中尽可能简单的等价物是。

from video.models import Video

 class IndexView(generic.ListView):
   template_name = 'home/index.html'
   context_object_name = 'top_three'

   def get_queryset(self):
    return Video.objects.all()[:3]

在设置中，检查是否存在以下内容。

TEMPLATES = [
{
    'BACKEND': 'django.template.backends.django.DjangoTemplates',
    'DIRS': [],
    'APP_DIRS': True,
    'OPTIONS': {
        'context_processors': [
            'django.template.context_processors.debug',
            'django.template.context_processors.request',
            'django.contrib.auth.context_processors.auth',
            'django.contrib.messages.context_processors.messages',
        ],
    },
},
]

不用上课对我很有效。我只是做了我们通常做的事情。

from django.shortcuts import render
from AllBlogs.models import Post        # getting this post form AllBlogs app 

# Create your views here.

def home (request):
    # sort posts according to date in descending order
    # only a single query is generated and then hit the database that's how this will not affect the performance of database
    latest_blogs = Post.objects.all().order_by("-date")[:3]   
    return render(request,'Home/home.html',{'blog':latest_blogs})

这是我的模板

<!--separated it from the home.html because we can use it in AllBlogs.html
and it  save our work and time by just including without copying the same data several times-->
{% load static %}
<li>
  <!--add field name which we used in models-->
    <article class="blog">
      <a href="{% url 'blogDetails_page' blog.slug %}">     <!--Different slug for different blog as slug will create a different url-->
        <!--dtl filter to add back or url dynamic url creation-->
        <image src="{% static 'images/'|add:blog.image_name %}" alt="{{blog.title}}">
        <div class="blog__content">
          <h3>{{blog.title}}</h3>
          <p>{{blog.excerpt}}</P>
        </div>
      </a>
    </article>
</li>

这是波斯特模型

# having post data 
class Post(models.Model):
    title = models.CharField(max_length=150)
    date = models.DateField(auto_now=True)    # put the date in the field at which time we are saving the data
    image_name = models.CharField(max_length=50)          # later on we upload files right now we get images from static folder
    excerpt = models.CharField(max_length=200)
    content = models.TextField(validators=[MinLengthValidator(10)])    # TextFields same like CharField
    slug = models.SlugField(unique=True, db_index=True)     # set it as unique because we are going to use it as a primary key
    author = models.ForeignKey(Author,on_delete=models.SET_NULL,related_name='posts',null=True)      # one to many relation 
    tags = models.ManyToManyField(Tag)              # ManyToManyRelation with tag

    # represent post entry by it post title
    def __str__(self):
        return self.title