Question

我在使用TaggableManager时遇到一些问题。我是使用Django的新手，所以我做了关于教程的教程。现在，我想为每个博客帖子添加标签。我完成了taggit的安装过程，他们说我需要添加一个自定义显示方法，但是这些都没有用。（第7页：https://media.readthedocs.org/pdf/django-taggit/stable/django-taggit.pdf）

当我想打开博客文章时，出现该错误：

AttributeError at /post/4/ 
'_TaggableManager' object has no attribute 'name' 
Request Method: GET  Request URL:   http://127.0.0.1:8000/post/4/
Django Version: 2.0.6  
Exception Type: AttributeError  
Exception Value:'_TaggableManager' object has no attribute 'name' Exception Location:   /usr/local/lib/python3.6/site-packages/django/db/models/manager.py in __str__, line 36  
Python Executable:  /usr/local/opt/python/bin/python3.6  
Python Version: 3.6.5

在下面，您可以查看我的代码： models.py

from django.db import models
from django.contrib import admin
from django.utils import timezone
from taggit.managers import TaggableManager


class Post(models.Model):
    objects = models.Manager()
    author = models.ForeignKey('auth.User', on_delete=models.CASCADE)
    title = models.CharField(max_length=200)
    text = models.TextField()
    created_date = models.DateTimeField(
        default=timezone.now)
    published_date = models.DateTimeField(
        blank=True, null=True)
    tags = TaggableManager()

    def publish(self):
        self.published_date = timezone.now()
        self.save()

    def __str__(self):
        return self.title

class PostAdmin(admin.ModelAdmin):
    list_display = ['tag_list']
    def get_queryset(self, request):
        return super(PostAdmin, self).get_queryset(request).prefetch_related('tags')

    def tag_list(self, obj):
        return u", ".join(o.name for o in obj.tags.all())

Answer 1

views.py

from django.shortcuts import render, get_object_or_404
    from django.utils import timezone
    from django.views.generic import ListView, DetailView
    from .models import Post
    from .forms import PostForm
    from django.shortcuts import redirect
    from django.contrib.auth.decorators import login_required
    from taggit.managers import TaggableManager


class TagMixin(object):
    def get_context_data(self, **kwargs):
        context = super(TagMixin, self).get_context_data(**kwargs)
        context['tags'] = Post.objects.all()
        return context


def post_list(request):
    posts = Post.objects.filter(
        published_date__lte=timezone.now()).order_by('published_date')
    return render(request, 'blog/post_list.html', {'posts': posts})


def post_detail(request, pk):
    post = get_object_or_404(Post, pk=pk)
    post_related = post.tags.similar_objects()
    return render(request, 'blog/post_detail.html', {'post': post, 'post_related': post_related})


@login_required
def post_new(request):
    if request.method == "POST":
        form = PostForm(request.POST)
        if form.is_valid():
            post = form.save(commit=False)
            post.author = request.user
            post.save()
            form.save_m2m()
            return redirect('post_detail', pk=post.pk)
    else:
        form = PostForm()
    return render(request, 'blog/post_edit.html', {'form': form})


@login_required
def post_edit(request, pk):
    post = get_object_or_404(Post, pk=pk)
    if request.method == "POST":
        form = PostForm(request.POST, instance=post)
        if form.is_valid():
            post = form.save(commit=False)
            post.author = request.user
            post.save()
            form.save_m2m()
            return redirect('post_detail', pk=post.pk)
    else:
        form = PostForm(instance=post)
    return render(request, 'blog/post_edit.html', {'form': form})


@login_required
def post_draft_list(request):
    posts = Post.objects.filter(
        published_date__isnull=True).order_by('created_date')
    return render(request, 'blog/post_draft_list.html', {'posts': posts})


@login_required
def post_publish(request, pk):
    post = get_object_or_404(Post, pk=pk)
    post.publish()
    return redirect('post_detail', pk=pk)


@login_required
def post_remove(request, pk):
    post = get_object_or_404(Post, pk=pk)
    post.delete()
    return redirect('post_list')


class TagListView(TagMixin, ListView):
    template_name = "blog/post_list.html"
    model = Post
    paginate_by = '10'
    context_object_name = 'posts'

    def get_queryset(self):
        return Post.objects.filter(tags__slug=self.kwargs.get("slug")).all()

“ _TaggableManager”对象的博客帖子没有属性“名称”

1 个答案: