如何避免在django表单中重发数据和更新页面？

from django.shortcuts import render, redirect
from django.contrib import messages
from .forms import MyForm

def my_view(request):
    if request.method == 'POST':
        form = MyForm(request.POST)
        if form.is_valid():
            # 处理表单数据
            form.save()
            # 存储成功消息
            messages.success(request, '数据已成功提交！')
            # 重定向到另一个URL
            return redirect('success')
    else:
        form = MyForm()
    
    return render(request, 'my_template.html', {'form': form})

def success_view(request):
    # 获取并显示消息闪存中的消息
    messages = messages.get_messages(request)
    return render(request, 'success_template.html', {'messages': messages})