如何防止Django中的用户注册表单返回密码字段不能为空

<input type="password" name="password" required>

from django import forms

class RegistrationForm(forms.Form):
    password = forms.CharField(widget=forms.PasswordInput, required=True)
    # 其他字段...

from django.shortcuts import render
from .forms import RegistrationForm

def register(request):
    if request.method == 'POST':
        form = RegistrationForm(request.POST)
        if form.is_valid():
            # 处理注册逻辑
            # ...
        else:
            # 表单验证失败，返回错误信息给用户
            error_message = form.errors.get('password', '')
            return render(request, 'register.html', {'form': form, 'error_message': error_message})
    else:
        form = RegistrationForm()
        return render(request, 'register.html', {'form': form})