如問題所述，我在模板中收到兩個錯誤。這是代碼def create(request):full_content = forms.InputForm()if request.method == "POST":    full_content = forms.InputForm(request.POST)        if full_content.is_valid():         title = full_content.cleaned_data["title"]        content = full_content.cleaned_data["content"]         if full_content.clean_title():#Works                            full_content.create(title, content)            context= {                'title' : util.get_page_name(title),                'entry' : util.get_entry(title),            }                            return render(request, "encyclopedia/entry.html",context)                   #From here on its not valid:    context = {        'form':full_content    }    return render(request, "encyclopedia/create.html", context)      return render(request, "encyclopedia/create.html", {    'form':full_content})以及 forms.clean_title()：def clean_title(self):    title_name = self.cleaned_data.get("title")    filename = f'entries/{title_name}.md'            if default_storage.exists(filename):        raise ValidationError("This title is already taken")    return title_name當然還有 create.html：<h3>Create new entry</h3><form action="{% url 'create'%}" method="POST">        {{ form.title.errors }}        {% csrf_token %}    <table>        {{form.as_p}}    </table>        <button type="submit" value="save">Save</button></form>為什么我得到兩顆子彈有什么想法嗎？：此標題已被占用此標題已被占用