python速成类(class)使未注册用户可以访问django帖子

Question

我目前正在尝试做这个 python 速成类(class)的练习，但不确定如何进行。这是有问题的练习。

Then try adding a more advanced feature,
such as giving users the option of making a topic public. This would require an
attribute called public as part of the Topic model (this should be set to False
by default) and a form element on the new_topic page that allows the user to
change a topic from private to public.

以下是我到目前为止所做的更改
在forms.py中，我的理解是当用户在“公共(public)”文本中键入“真”或“假”时，主题模型的公共(public)属性会相应更新吗？

from django import forms

from .models import Topic, Entry

class TopicForm(forms.ModelForm):
    class Meta:
        model = Topic
        fields = ['text', 'public']
        labels = {'text': '', 'public' : "True/False"}

class EntryForm(forms.ModelForm):
    class Meta:
        model = Entry
        fields = ['text']
        labels = {'text': 'Entry:'}
        widgets = {'text': forms.Textarea(attrs={'cols': 80})}

models.py 中的主题模型

from django.db import models
from django.contrib.auth.models import User

# Create your models here.

class Topic(models.Model):
    """A topic the user is learning about."""
    text = models.CharField(max_length=200)
    date_added = models.DateTimeField(auto_now_add=True)
    owner = models.ForeignKey(User, on_delete=models.CASCADE)
    public = models.BooleanField(default=False)

    def __str__(self):
        """Return a string representation of the model."""
        return self.text

我目前的猜测是，在主题函数下的views.py中，我必须对其进行编辑，以便测试所有者ID或查看者是否尚未登录，然后相应地返回所有公共(public)主题。因此，我恳请您在正确的方向左右寻求刺激。谢谢大家!
views.py 中的当前主题功能

@login_required
def topics(request):
    """Show all topics."""
    topics = Topic.objects.filter(owner=request.user).order_by('date_added')
    context = {'topics': topics}
    return render(request, 'learning_logs/topics.html', context)

得到帮助后的最终代码:
表格.py

class TopicForm(forms.ModelForm):
    class Meta:
        model = Topic
        fields = ['text', 'public']
        labels = {'text': '', 'public' : "Tick to set to public"}

模型.py

class Topic(models.Model):
    """A topic the user is learning about."""
    text = models.CharField(max_length=200)
    date_added = models.DateTimeField(auto_now_add=True)
    owner = models.ForeignKey(User, on_delete=models.CASCADE)
    public = models.BooleanField(default=False)

    def __str__(self):
        """Return a string representation of the model."""
        return self.text

View .py

def topics(request):
    """Show all topics."""
    if request.user.is_authenticated:
        topics = Topic.objects.filter(owner=request.user).order_by('date_added')
    else:
        topics = Topic.objects.filter(public=True).order_by('date_added')
    context = {'topics': topics}
    return render(request, 'learning_logs/topics.html', context)

Answer 1

您可以检查用户是否已登录，并根据此过滤器仅针对公共(public)项目或公共(public)项目与用户是所有者的项目组合:

from django.db.models import Q

def topics(request):
    if request.user.is_authenticated:
        topics = Topic.objects.filter(…)
    else:
        topics = Topic.objects.filter(…)
    topics = topics.order_by('date_added')
    context = {'topics': topics}
    return render(request, 'learning_logs/topics.html', context)

与 …还需要填写的部分。用户认证的部分需要 Q objects [Django-doc]实现逻辑析取。