Django 验证返回两个错误而不是一个

Question

正如问题所述，我在模板中收到两个错误。这是代码

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
})

还有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

当然还有 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>

任何想法为什么我得到两颗子弹？：

• 此标题已被占用
• 此标题已被占用

Answer 1

不需要{{ form.title.errors }}。 {{form.as_p}} 也显示错误。所以删除它。

<h3>Create new entry</h3>
<form action="{% url 'create'%}" method="POST">
    
    {% csrf_token %}
    <table>
        {{form.as_p}}
    </table>
    
    <button type="submit" value="save">Save</button>
</form>