Django:显示所有可能的表单错误

# forms.py
from django import forms

class ContactForm(forms.Form):
    name = forms.CharField(max_length=100)
    email = forms.EmailField()
    message = forms.CharField(widget=forms.Textarea)

# views.py
from django.shortcuts import render
from .forms import ContactForm

def contact(request):
    if request.method == 'POST':
        form = ContactForm(request.POST)
        if form.is_valid():
            # 处理有效表单数据
            pass
    else:
        form = ContactForm()
    return render(request, 'contact.html', {'form': form})

<!-- contact.html -->
<form method="post">
    {% csrf_token %}
    {{ form.as_p }}
    <button type="submit">Submit</button>
</form>

<!-- 显示所有错误 -->
{% if form.errors %}
    <div class="error">
        <ul>
            {% for field in form %}
                {% for error in field.errors %}
                    <li>{{ field.label }}: {{ error }}</li>
                {% endfor %}
            {% endfor %}
            {% for error in form.non_field_errors %}
                <li>{{ error }}</li>
            {% endfor %}
        </ul>
    </div>
{% endif %}