Python Django form.is_valid（）失败的基于类的视图-表单、SingleObject、DetailMixins

我有两个应用程序，这里我们称它们为博客和评论

注释有一个注释模型。博客有一个博客模型。评论有一个评论表单。博客有一个详细视图

我希望我的评论表单显示在“博客详细信息”视图中，以便人们可以从博客详细信息页面提交评论

表单呈现正常-它发出POST请求，它重定向以获取_success_url（），但是（我在views.py中添加了几个打印项-请参见下文）在views.py中进行测试以查看是否收到表单数据，我看到表单。is_valid（）路径未满足，我不明白原因

我基本上是在尝试遵循这个“替代更好的解决方案”：

blog/views.py

class CommentLooker(SingleObjectMixin, FormView):
    template_name = 'blogs/blog_detail.html'
    form_class = CommentForm
    model = blog

    def get_object(self):
        #self.team = get_object_or_404(team, team_id=self.kwargs['team_id'])
        #queryset_list = blog.objects.filter(team = self.team)
        team_id_ = self.kwargs.get("team_id")
        blog_id_ = self.kwargs.get("blog_id")
        return get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

    def post(self, request, *args, **kwargs):
        if not request.user.is_authenticated:
            return HttpResponseForbidden()
        self.object = self.get_object()
        return super(CommentLooker, self).post(request, *args, **kwargs)

    def get_success_url(self):
        return reverse('blogs:teams')

class blogDisplay(View):
    def get(self,request,*args,**kwargs):
        view = blogFromteamContentView.as_view()
        return view(request, *args, **kwargs)
    def post(self,request,*args,**kwargs):
        view = CommentLooker.as_view()
        return view(request,*args,**kwargs)

class blogFromteamContentView(LoginRequiredMixin, DetailView):
    model = blog
    template_name = 'blogs/blog_detail.html'
    # override get_object so we can use blog_id when we use this class in urls.py
    # otherwise DetailViews expect 'pk' which defaults to the primary key of the model.

    def get_object(self):
        team_id_ = self.kwargs.get("team_id")
        blog_id_ = self.kwargs.get("blog_id")
        return get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

    def get_context_data(self, **kwargs):
        context = super(blogFromteamContentView, self).get_context_data(**kwargs)
        team_id_ = self.kwargs.get("team_id")
        blog_id_ = self.kwargs.get("blog_id")

        # get the list of blogs for a given blog id and team id combination.
        context['queryset'] = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

        # get and set things related to ability to associate comments to a blog.
        initial_data = {
                "content_type": blog.get_content_type,
                "object_id": blog.blog_id
            }
        comments        = blog.comments # uses the @property set in this class.
        comment_form    = CommentForm(self.request.POST or None, initial=initial_data)
        if comment_form.is_valid():
            print(comment_form.cleaned_data)
        else:
            print('invalido!')
        context['comment_form'] = comment_form
        return context

class Blog(models.Model):
    team= models.ForeignKey(Team, on_delete=CASCADE)
    blog_id = models.AutoField(primary_key=True)
    blog_name = models.CharField(
        max_length=100, verbose_name='Blog Name')

path('teams/<int:team_id>/blogs/<int:blog_id>/', blog.blogDisplay.as_view(), name='detail'),

blog/models.py

class CommentLooker(SingleObjectMixin, FormView):
    template_name = 'blogs/blog_detail.html'
    form_class = CommentForm
    model = blog

    def get_object(self):
        #self.team = get_object_or_404(team, team_id=self.kwargs['team_id'])
        #queryset_list = blog.objects.filter(team = self.team)
        team_id_ = self.kwargs.get("team_id")
        blog_id_ = self.kwargs.get("blog_id")
        return get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

    def post(self, request, *args, **kwargs):
        if not request.user.is_authenticated:
            return HttpResponseForbidden()
        self.object = self.get_object()
        return super(CommentLooker, self).post(request, *args, **kwargs)

    def get_success_url(self):
        return reverse('blogs:teams')

class blogDisplay(View):
    def get(self,request,*args,**kwargs):
        view = blogFromteamContentView.as_view()
        return view(request, *args, **kwargs)
    def post(self,request,*args,**kwargs):
        view = CommentLooker.as_view()
        return view(request,*args,**kwargs)

class blogFromteamContentView(LoginRequiredMixin, DetailView):
    model = blog
    template_name = 'blogs/blog_detail.html'
    # override get_object so we can use blog_id when we use this class in urls.py
    # otherwise DetailViews expect 'pk' which defaults to the primary key of the model.

    def get_object(self):
        team_id_ = self.kwargs.get("team_id")
        blog_id_ = self.kwargs.get("blog_id")
        return get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

    def get_context_data(self, **kwargs):
        context = super(blogFromteamContentView, self).get_context_data(**kwargs)
        team_id_ = self.kwargs.get("team_id")
        blog_id_ = self.kwargs.get("blog_id")

        # get the list of blogs for a given blog id and team id combination.
        context['queryset'] = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

        # get and set things related to ability to associate comments to a blog.
        initial_data = {
                "content_type": blog.get_content_type,
                "object_id": blog.blog_id
            }
        comments        = blog.comments # uses the @property set in this class.
        comment_form    = CommentForm(self.request.POST or None, initial=initial_data)
        if comment_form.is_valid():
            print(comment_form.cleaned_data)
        else:
            print('invalido!')
        context['comment_form'] = comment_form
        return context

class Blog(models.Model):
    team= models.ForeignKey(Team, on_delete=CASCADE)
    blog_id = models.AutoField(primary_key=True)
    blog_name = models.CharField(
        max_length=100, verbose_name='Blog Name')

path('teams/<int:team_id>/blogs/<int:blog_id>/', blog.blogDisplay.as_view(), name='detail'),

blog/url.py

class CommentLooker(SingleObjectMixin, FormView):
    template_name = 'blogs/blog_detail.html'
    form_class = CommentForm
    model = blog

    def get_object(self):
        #self.team = get_object_or_404(team, team_id=self.kwargs['team_id'])
        #queryset_list = blog.objects.filter(team = self.team)
        team_id_ = self.kwargs.get("team_id")
        blog_id_ = self.kwargs.get("blog_id")
        return get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

    def post(self, request, *args, **kwargs):
        if not request.user.is_authenticated:
            return HttpResponseForbidden()
        self.object = self.get_object()
        return super(CommentLooker, self).post(request, *args, **kwargs)

    def get_success_url(self):
        return reverse('blogs:teams')

class blogDisplay(View):
    def get(self,request,*args,**kwargs):
        view = blogFromteamContentView.as_view()
        return view(request, *args, **kwargs)
    def post(self,request,*args,**kwargs):
        view = CommentLooker.as_view()
        return view(request,*args,**kwargs)

class blogFromteamContentView(LoginRequiredMixin, DetailView):
    model = blog
    template_name = 'blogs/blog_detail.html'
    # override get_object so we can use blog_id when we use this class in urls.py
    # otherwise DetailViews expect 'pk' which defaults to the primary key of the model.

    def get_object(self):
        team_id_ = self.kwargs.get("team_id")
        blog_id_ = self.kwargs.get("blog_id")
        return get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

    def get_context_data(self, **kwargs):
        context = super(blogFromteamContentView, self).get_context_data(**kwargs)
        team_id_ = self.kwargs.get("team_id")
        blog_id_ = self.kwargs.get("blog_id")

        # get the list of blogs for a given blog id and team id combination.
        context['queryset'] = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

        # get and set things related to ability to associate comments to a blog.
        initial_data = {
                "content_type": blog.get_content_type,
                "object_id": blog.blog_id
            }
        comments        = blog.comments # uses the @property set in this class.
        comment_form    = CommentForm(self.request.POST or None, initial=initial_data)
        if comment_form.is_valid():
            print(comment_form.cleaned_data)
        else:
            print('invalido!')
        context['comment_form'] = comment_form
        return context

class Blog(models.Model):
    team= models.ForeignKey(Team, on_delete=CASCADE)
    blog_id = models.AutoField(primary_key=True)
    blog_name = models.CharField(
        max_length=100, verbose_name='Blog Name')

path('teams/<int:team_id>/blogs/<int:blog_id>/', blog.blogDisplay.as_view(), name='detail'),

编辑：

使用打印后（注释表单错误）：

对象id

输入一个整数。

问题可能在于我的初始数据。事实上，我的初始数据中的内容类型和对象id都是问题。我要的是blog.blog_id-即使用类，而不是实例。所以我改变了

获取上下文数据：

def get_context_data(self, **kwargs):
context = super(blogFromteamContentView, self).get_context_data(**kwargs)
team_id_ = self.kwargs.get("team_id")
blog_id_ = self.kwargs.get("blog_id")

# get the list of blogs for a given blog id and team id combination.
context['queryset_list_recs'] = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

instance = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)
initial_data = {
        "content_type": instance.get_content_type,
        "object_id": blog_id_
    }

def post(self, request, *args, **kwargs):
    if not request.user.is_authenticated:
        return HttpResponseForbidden()
    self.object = self.get_object()
    comment_form = CommentForm(self.request.POST)
    if comment_form.is_valid():
        print('valido')
        c_type = comment_form.cleaned_data.get("content_type")
        content_type = ContentType.objects.get(model=c_type)
        obj_id = comment_form.cleaned_data.get('object_id')
        content_data = comment_form.cleaned_data.get("content")
        new_comment, created = Comment.objects.get_or_create(
            user = self.request.user,
            content_type = content_type,
            object_id = obj_id,
            content = content_data
        )
    else:
        print('postinvalido!')
    return super(CommentLooker, self).post(request, *args, **kwargs)

def get_context_data(self, **kwargs):
context = super(blogFromteamContentView, self).get_context_data(**kwargs)
team_id_ = self.kwargs.get("team_id")
blog_id_ = self.kwargs.get("blog_id")

# get the list of blogs for a given blog id and team id combination.
context['queryset_list_recs'] = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

instance = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)
initial_data = {
        "content_type": instance.get_content_type,
        "object_id": blog_id_
    }

和我的视图。py:

def get_context_data(self, **kwargs):
context = super(blogFromteamContentView, self).get_context_data(**kwargs)
team_id_ = self.kwargs.get("team_id")
blog_id_ = self.kwargs.get("blog_id")

# get the list of blogs for a given blog id and team id combination.
context['queryset_list_recs'] = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

instance = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)
initial_data = {
        "content_type": instance.get_content_type,
        "object_id": blog_id_
    }

def post(self, request, *args, **kwargs):
    if not request.user.is_authenticated:
        return HttpResponseForbidden()
    self.object = self.get_object()
    comment_form = CommentForm(self.request.POST)
    if comment_form.is_valid():
        print('valido')
        c_type = comment_form.cleaned_data.get("content_type")
        content_type = ContentType.objects.get(model=c_type)
        obj_id = comment_form.cleaned_data.get('object_id')
        content_data = comment_form.cleaned_data.get("content")
        new_comment, created = Comment.objects.get_or_create(
            user = self.request.user,
            content_type = content_type,
            object_id = obj_id,
            content = content_data
        )
    else:
        print('postinvalido!')
    return super(CommentLooker, self).post(request, *args, **kwargs)

def get_context_data(self, **kwargs):
context = super(blogFromteamContentView, self).get_context_data(**kwargs)
team_id_ = self.kwargs.get("team_id")
blog_id_ = self.kwargs.get("blog_id")

# get the list of blogs for a given blog id and team id combination.
context['queryset_list_recs'] = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

instance = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)
initial_data = {
        "content_type": instance.get_content_type,
        "object_id": blog_id_
    }

这（不适当的打印语句除外）现在似乎给出了预期的行为。

使用打印后（注释形式错误）：

• 对象id
• 列表项

输入一个整数

问题可能在于我的初始数据。事实上，我的初始数据中的内容类型和对象id都是问题。我要的是blog.blog_id-即使用类，而不是实例。所以我改变了

获取上下文数据：

def get_context_data(self, **kwargs):
context = super(blogFromteamContentView, self).get_context_data(**kwargs)
team_id_ = self.kwargs.get("team_id")
blog_id_ = self.kwargs.get("blog_id")

# get the list of blogs for a given blog id and team id combination.
context['queryset_list_recs'] = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

instance = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)
initial_data = {
        "content_type": instance.get_content_type,
        "object_id": blog_id_
    }

def post(self, request, *args, **kwargs):
    if not request.user.is_authenticated:
        return HttpResponseForbidden()
    self.object = self.get_object()
    comment_form = CommentForm(self.request.POST)
    if comment_form.is_valid():
        print('valido')
        c_type = comment_form.cleaned_data.get("content_type")
        content_type = ContentType.objects.get(model=c_type)
        obj_id = comment_form.cleaned_data.get('object_id')
        content_data = comment_form.cleaned_data.get("content")
        new_comment, created = Comment.objects.get_or_create(
            user = self.request.user,
            content_type = content_type,
            object_id = obj_id,
            content = content_data
        )
    else:
        print('postinvalido!')
    return super(CommentLooker, self).post(request, *args, **kwargs)

def get_context_data(self, **kwargs):
context = super(blogFromteamContentView, self).get_context_data(**kwargs)
team_id_ = self.kwargs.get("team_id")
blog_id_ = self.kwargs.get("blog_id")

# get the list of blogs for a given blog id and team id combination.
context['queryset_list_recs'] = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)

instance = get_object_or_404(blog, blog_id=blog_id_, team=team_id_)
initial_data = {
        "content_type": instance.get_content_type,
        "object_id": blog_id_
    }

对于我的视图.py：

def post(self, request, *args, **kwargs):
    if not request.user.is_authenticated:
        return HttpResponseForbidden()
    self.object = self.get_object()
    comment_form = CommentForm(self.request.POST)
    if comment_form.is_valid():
        print('valido')
        c_type = comment_form.cleaned_data.get("content_type")
        content_type = ContentType.objects.get(model=c_type)
        obj_id = comment_form.cleaned_data.get('object_id')
        content_data = comment_form.cleaned_data.get("content")
        new_comment, created = Comment.objects.get_or_create(
            user = self.request.user,
            content_type = content_type,
            object_id = obj_id,
            content = content_data
        )
    else:
        print('postinvalido!')
    return super(CommentLooker, self).post(request, *args, **kwargs)

---

这（不恰当的打印语句除外）现在似乎给出了预期的行为。我不清楚为什么需要在post方法中创建CommentForm的实例-感觉我在这里做错了什么。

我想你的意思是如果comment\u form.is\u valid（）：在

blogFromteamContentView.get\u context\u data

中没有找到行

？在一篇文章中，你使用的是
CommentLooker
视图，而不是该视图。当然，我真傻。非常感谢。我将重点介绍CommentLooker的post方法。我不确定post是如何获取其上下文的——也就是说，我将在这里保存表单。因此，如果我定义初始数据并将
comment\u form=CommentForm（self.request.post，None，initial=initial\u data）
添加到
CommentLooker
的post方法中，则注释表单将失败
comment\u form。是否有效（）
刚才我的假设是，有一些错误使我的表单无效-一旦修复了，我会在CommentLooker的post方法中添加'Comment.objects.get_或'u create（[fields]），以保存注释。
print（form.errors）
给我：
object\u id
输入一个整数。
，所以我想问题在于我的初始数据。我将在主体中编辑一个澄清。主体问题文本已更新为近似的解决方案。我不确定是否要在CommentLooker的POST方法中实例化CommentForm（self.request.POST）。表格不是已经传进来了吗？我不清楚如何访问它。