Python Django，评论无法获取其所在帖子的名称

我对Python Django有意见。它与外键和模型有关。以前有人告诉我，我的问题通常都非常平庸，所以请容忍我的问题。我正在尝试为我正在使用的社交网络配置评论，我刚刚收到了一些评论。问题是，虽然我可以输入一条评论，数据库会记录它和写它的人，但它不会记录它所在的帖子。它总是返回null。这是我能说的全部内容，因为我真的不明白发生了什么。下面是一些不同的代码片段和图像，希望它们能够在不需要我感叹的情况下详细阐述这个问题

1： post应用程序的模型

重要的模式是：

class Comment(models.Model):

2： 答复模板：

3： 回复视图：

class PostReplyView(CreateView):
model = models.Comment
template_name = 'post_reply.html'
fields = ['comment']

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

最后，在发布评论时，对其缺少的内容进行可视化表示：

---

使用普通视图更新：

型号.py

from django.db import models
from user.models import MyUser
from django.urls import reverse
# Create your models here.

class Post(models.Model):
    user = models.ForeignKey(MyUser, on_delete=models.CASCADE)
    title = models.CharField(max_length=255)
    content = models.TextField()
    posted_on = models.DateTimeField(auto_now=True, auto_now_add=False)
    updated_on = models.DateTimeField(auto_now=False, auto_now_add=True)
    slug = models.SlugField(blank=True, null=True)

    def __str__(self):
        return "%s by %s" % (self.title, self.user.get_full_name())

    def get_absolute_url(self):
        return reverse('post:detail', kwargs={'slug':self.slug})

class Comment(models.Model):
    author = models.ForeignKey(MyUser, on_delete=models.CASCADE)
    post = models.ForeignKey(Post, on_delete=models.CASCADE)
    comment = models.TextField()
    posted_on = models.DateTimeField(auto_now_add=True, auto_now=False)

    def __str__(self):
        return "%s commented on %s" % (self.author, self.post)

from django import forms
from .models import Post, Comment

class newPost(forms.ModelForm):
    class Meta:
        model = Post
        fields = ['title','content']


class newComment(forms.ModelForm):
    class Meta:
        model = Comment
        fields = ['comment']

def detail(request, slug=None):
    post = get_object_or_404(Post, slug=slug)
    user = request.user

    if request.method == 'POST':
        comment = newComment(request.POST)
        if comment.is_valid():
            new_Comment = comment.save(commit=False)
            new_Comment.author = user
            new_Comment.post = post
            new_Comment.save()
            # successfully commented, now do whatever you want
            return HttpResponse('commented')
    else:
        comment = newComment()

    context = {
        'post' : post,
        'comment' : comment
    }
    return render(request, 'post/detail.html', context)

forms.py

from django.db import models
from user.models import MyUser
from django.urls import reverse
# Create your models here.

class Post(models.Model):
    user = models.ForeignKey(MyUser, on_delete=models.CASCADE)
    title = models.CharField(max_length=255)
    content = models.TextField()
    posted_on = models.DateTimeField(auto_now=True, auto_now_add=False)
    updated_on = models.DateTimeField(auto_now=False, auto_now_add=True)
    slug = models.SlugField(blank=True, null=True)

    def __str__(self):
        return "%s by %s" % (self.title, self.user.get_full_name())

    def get_absolute_url(self):
        return reverse('post:detail', kwargs={'slug':self.slug})

class Comment(models.Model):
    author = models.ForeignKey(MyUser, on_delete=models.CASCADE)
    post = models.ForeignKey(Post, on_delete=models.CASCADE)
    comment = models.TextField()
    posted_on = models.DateTimeField(auto_now_add=True, auto_now=False)

    def __str__(self):
        return "%s commented on %s" % (self.author, self.post)

from django import forms
from .models import Post, Comment

class newPost(forms.ModelForm):
    class Meta:
        model = Post
        fields = ['title','content']


class newComment(forms.ModelForm):
    class Meta:
        model = Comment
        fields = ['comment']

def detail(request, slug=None):
    post = get_object_or_404(Post, slug=slug)
    user = request.user

    if request.method == 'POST':
        comment = newComment(request.POST)
        if comment.is_valid():
            new_Comment = comment.save(commit=False)
            new_Comment.author = user
            new_Comment.post = post
            new_Comment.save()
            # successfully commented, now do whatever you want
            return HttpResponse('commented')
    else:
        comment = newComment()

    context = {
        'post' : post,
        'comment' : comment
    }
    return render(request, 'post/detail.html', context)

视图.py

from django.db import models
from user.models import MyUser
from django.urls import reverse
# Create your models here.

class Post(models.Model):
    user = models.ForeignKey(MyUser, on_delete=models.CASCADE)
    title = models.CharField(max_length=255)
    content = models.TextField()
    posted_on = models.DateTimeField(auto_now=True, auto_now_add=False)
    updated_on = models.DateTimeField(auto_now=False, auto_now_add=True)
    slug = models.SlugField(blank=True, null=True)

    def __str__(self):
        return "%s by %s" % (self.title, self.user.get_full_name())

    def get_absolute_url(self):
        return reverse('post:detail', kwargs={'slug':self.slug})

class Comment(models.Model):
    author = models.ForeignKey(MyUser, on_delete=models.CASCADE)
    post = models.ForeignKey(Post, on_delete=models.CASCADE)
    comment = models.TextField()
    posted_on = models.DateTimeField(auto_now_add=True, auto_now=False)

    def __str__(self):
        return "%s commented on %s" % (self.author, self.post)

from django import forms
from .models import Post, Comment

class newPost(forms.ModelForm):
    class Meta:
        model = Post
        fields = ['title','content']


class newComment(forms.ModelForm):
    class Meta:
        model = Comment
        fields = ['comment']

def detail(request, slug=None):
    post = get_object_or_404(Post, slug=slug)
    user = request.user

    if request.method == 'POST':
        comment = newComment(request.POST)
        if comment.is_valid():
            new_Comment = comment.save(commit=False)
            new_Comment.author = user
            new_Comment.post = post
            new_Comment.save()
            # successfully commented, now do whatever you want
            return HttpResponse('commented')
    else:
        comment = newComment()

    context = {
        'post' : post,
        'comment' : comment
    }
    return render(request, 'post/detail.html', context)

detail.html

<h1>{{ post.title }}</h1>
<p>{{ post.content }}</p>

<hr>

<form action="" method="post">
    {% csrf_token %}
    {{ comment.as_p }}
    <input type="submit">
</form>

{{post.title}
{{post.content}}


{%csrf_令牌%}
{{comment.as_p}}

---

**“post”上的字段为空，因为您没有将其与任何post链接，但在上面的示例中，我已经向您展示了我是如何做到这一点的，以及您如何为您的项目做到这一点**

也许您需要将post字段包括在classI的fields属性中，但我真的不太确定我该怎么处理你给我看的东西。我需要在models.py文件中具体替换什么？1）您需要了解“注释模型”中有哪些字段，以及其中有多少字段是“外键”。2） 出现错误的唯一部分是因为inside views.py如果仔细查看，则会链接一个外键（作者到登录用户），但由于模型中还有另一个外键，因此也需要将该外键/字段链接到现有帖子。3） 您使用的是基于类的视图，我将更新我的答案，请检查，它将涵盖如何将您的评论链接到相应的帖子