python - Django 无法在数据库中保存表单

Question

我正在学习 Django，我正在尝试使用 POST 方法保存表单，发现它工作正常，但我无法在数据库中看到保存的消息(表单未提交)

模型.py

class Post(models.Model):
    title = models.CharField(max_length=200)
    description = models.TextField(max_length=10000)
    pub_date = models.DateTimeField(auto_now_add=True)
    slug = models.SlugField(max_length=200, unique=True)

    def __unicode__(self):
        return self.title

    def description_as_list(self):
        return self.description.split('\n')

class Comment(models.Model):
    title = models.ForeignKey(Post)
    comments = models.CharField(max_length=200)

    def __unicode__(self):
        return '%s' % (self.title)

表格.py

class PostForm(forms.ModelForm):
    class Meta:
        model = Post
        fields = ('title', 'description')

editPostedForm = modelformset_factory(Post, PostForm)

class CommentForm(forms.ModelForm):
    class Meta:
        model = Comment
        fields = ('comments',)
        exclude = ('title',)

View .py

def detail(request, id):
    posts = Post.objects.get(id=id)
    comments = posts.comment_set.all()
    forms = CommentForm
    if request.method == 'POST':
        form = CommentForm(request.POST, instance=posts)
        print form
        if form.is_valid():
            form.save(commit=False)
            form.save()
        else:
          print form.errors
    else:
        form = PostForm()

    return render(request, "detail_post.html", {'forms':forms,'posts': posts,'comments':comments})

为什么没有保存发布消息。我在控制台中得到了状态码 200，我也得到了输入的数据，但是表格没有被保存...非常感谢任何帮助

Answer 1

我认为问题在于您的表单排除了 title 字段，但根据 Comment 定义，它是必需的。您需要将 title 提供给评论实例，然后保存它:

def detail(request, id):
    posts = Post.objects.get(id=id)
    comments = posts.comment_set.all()
    forms = CommentForm
    if request.method == 'POST':
        form = CommentForm(request.POST,instance=posts)
        print form
        if form.is_valid():
            # create a comment instance in memory first
            comment = form.save(commit=False)
            # fill out the title field
            comment.title = posts
            comment.save()
        else:
          print form.errors
    else:
        form = PostForm()

    return render(request, "detail_post.html", {'forms':forms,'posts': posts,'comments':comments})

此外，我不知道为什么你在一个实例中使用复数形式，比如 posts 应该是 post 因为你使用 objects.get()，使您的代码更具可读性可以避免其他人的困惑。