在Django中自定义表单验证错误显示

from django import forms

class MyForm(forms.Form):
    name = forms.CharField(max_length=100)
    email = forms.EmailField()

    def clean_name(self):
        name = self.cleaned_data.get('name')
        if len(name) < 3:
            raise forms.ValidationError('Name must be at least 3 characters long.')
        return name

    def clean_email(self):
        email = self.cleaned_data.get('email')
        if not email.endswith('@example.com'):
            raise forms.ValidationError('Only example.com email addresses are allowed.')
        return email

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

{% if form.errors %}
  <ul class="errorlist">
    {% for field in form %}
      {% if field.errors %}
        <li>{{ field.label }}: {{ field.errors|join:", " }}</li>
      {% endif %}
    {% endfor %}
  </ul>
{% endif %}