Django 2.2无法找出如何授权用户编辑或删除博客文章，如果用户创建了博客文章

of1yzvn4  于 2023-08-08  发布在  Go
关注(0)|答案(1)|浏览(127)

这是我第三次问这个问题了。我不知道如何只允许一个用户，创建了一个特定的博客文章，编辑或删除该文章。这个博客就像其他博客一样。所有用户都可以查看所有其他用户的博客文章。要创建博客文章，用户必须已经使用帐户登录。编辑和删除博客文章也是如此。然而，我不知道如何检查用户是否可以编辑或删除博客文章，基于该用户是否是创建博客文章的人。我输入这个问题，因为没有人回答我之前发布的问题。下面是模型、视图和用于更新/编辑博客文章的html的三个文件。一旦我搞清楚了编辑就能搞清楚删除。我知道Django会自动创建添加、更改、删除权限。不幸的是，更改和删除权限总是返回false，即使该用户已经登录。我已经被困在这上面好几天了。已经超过三天15小时了。
博客/models.py

from django.db import models
from django.conf import settings
from django.utils import timezone
from django.db.models import Q

User = settings.AUTH_USER_MODEL

class BlogPostQuerySet(models.QuerySet):
    def published(self):
        now = timezone.now()
        return self.filter(publish_date__lte=now)

    def search(self, query):
        lookup = (
            Q(title__icontains=query) |
            Q(content__icontains=query) |
            Q(slug__icontains=query) |
            Q(user__first_name__icontains=query) |
            Q(user__last_name__icontains=query) |
            Q(user__username__icontains=query) |
            Q(user__email__icontains=query) |
            Q(image__icontains=query)
        )
        return self.filter(lookup)

class BlogPostManager(models.Manager):
    def get_queryset(self):
        return BlogPostQuerySet(self.model, using=self._db)

    def published(self):
        return self.get_queryset().published()

    def search(self, query=None):
        if query is None:
            return self.get_queryset().none()
        return self.get_queryset().published().search(query)

class BlogPost(models.Model): # blogpost_set -> queryset
    user = models.ForeignKey(User, default=1, null=True, on_delete=models.SET_NULL)
    image = models.ImageField(upload_to='image/', blank=True, null=True)
    title = models.CharField(max_length=120)
    slug = models.SlugField(unique=True) # Example: "hello world" -> hello-world
    content = models.TextField(null=True, blank=True)
    publish_date = models.DateTimeField(auto_now=False, auto_now_add=False, null=True, blank=True)
    timestamp = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    objects = BlogPostManager()

    class Meta:
        ordering = ['-publish_date','-updated','-timestamp']
        permission = (
            ("can_change_blogpost", "Can change BlogPost"),        
        )

    def get_absolute_url(self):
        return f"/blog/{self.slug}"

    def get_edit_url(self):
        return f"{self.get_absolute_url()}/edit"

    def get_delete_url(self):
        return f"{self.get_absolute_url()}/delete"

字符串
博客/views.py

from django.contrib.auth.decorators import login_required
from django.shortcuts import render, get_object_or_404
from .models import BlogPost
from .forms import BlogPostModelForm
from django.contrib.auth.models import User

def blog_post_list_view(request):
    qs = BlogPost.objects.all().published() # queryset -> list of python objects
    if request.user.is_authenticated:
        my_qs = BlogPost.objects.filter(user=request.user)
        qs = (qs | my_qs).distinct()
    context = {'object_list':qs}
    return render(request, 'blog/list.html', context)

@login_required
def blog_post_create_view(request):
    form = BlogPostModelForm(request.POST or None, request.FILES or None)
    if form.is_valid():
        obj = form.save(commit=False)
        obj.user = request.user
        obj.save()
        form = BlogPostModelForm()
    context = {'form':form}
    return render(request, 'blog/form.html', context)

def blog_post_detail_view(request, slug):
    obj = get_object_or_404(BlogPost, slug=slug)
    context = {'object':obj}
    return render(request, 'blog/detail.html', context)

@login_required
def blog_post_update_view(request, slug):
    obj = get_object_or_404(BlogPost, slug=slug)
    form = BlogPostModelForm(request.POST or None, instance=obj)
    if form.is_valid():
        form.save()
    context = {
            "form":form,
            "title":f"Update {obj.title}",
    }
    return render(request, 'blog/update.html', context)

@login_required
def blog_post_delete_view(request, slug):
    obj = get_object_or_404(BlogPost, slug=slug)
    if request.method == "POST":
        obj.delete()
    context = {'object':obj}
    return render(request, 'blog/delete.html', context)

型
blog/templates/blog/update.html

<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
    {% load static %}
    <link rel="stylesheet" type="text/css" href="{% static 'blog/style.css' %}">
    <title>New Blog post</title>
</head>
<body>
    <div class="parallax5" align="center">
        <h1 class="a">UPDATE your Blog page</h1><br>
        <h1>Perms</h1><br>
        {{ perms.blog.change_blogpost }}<br>
        {% if perms.blog.change_blogpost %}
        <form style="background-color:grey;" method="POST" action=".">
            <p>Please only post blogs that are in good taste. You can 
            update your blog below.</p>
            {% csrf_token %}
            {{ form.as_p }}
            <button type="submit">Update Blog</button>
        </form><br>
        {% else %}
            <p style="background-color:red;color:white;">You do not have permission to update this blog post</p>
        {% endif %}
        <a style="background-color:white;font-size:50px;" href="{% url 'list' %}">I'm done!<br>Go back to blog list</a>
    </div>
    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
  </body>
</html>

型
到目前为止我尝试过的……一切！你说的，我已经（很可能）知道你在说什么。我太累了，太生气了，甚至连我尝试过的所有东西的清单都没有。快来人啊！

django

1条答案

按热度按时间
8dtrkrch

8dtrkrch1#

我的网站确实有完全相同的行为，你要求，但有相当不同的实现。
Post Delete View看起来像这样：

class PostDeleteView(LoginRequiredMixin, UserPassesTestMixin, DeleteView):
    model = Post
    success_url = '/market'

    def test_func(self):
        post = self.get_object()
        if self.request.user == post.author:
            return True
        return False

字符串
更新后视图：

class PostUpdateView(LoginRequiredMixin, UserPassesTestMixin, UpdateView):
    model = Post
    fields = ['title', 'content']

    def form_valid(self, form):
        form.instance.author = self.request.user
        return super().form_valid(form)

    def test_func(self):
        post = self.get_object()
        if self.request.user == post.author:
            return True
        return False

型
为了使代码工作，您还需要导入以下内容：

from django.contrib.auth.mixins import LoginRequiredMixin, UserPassesTestMixin
from django.views.generic import ( ListView, DetailView, CreateView, UpdateView, DeleteView)

型
我知道，只是向你展示我的代码库可能不会直接帮助你，但它可能会给予你一些想法，让我知道。保持坚强，我知道有时候会让人沮丧，但你会处理好的。

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