用这一行：

date = models.DateTimeField(default=timezone.now)

您实际上是在为date字段提供用于定义数据库字段的django.db.models.DateTimeField类。
应将其替换为要插入的值：

date = timezone.now()

对不起我的代码在这里

def message_send(request):
if request.user.is_authenticated:
    if request.method == 'POST':
        name = request.user.username
        email = request.user.get_email
        title = request.POST.get('title')
        message = request.POST.get('message')
        date = models.DateTimeField(default=timezone.now)
        support = supportmessages(name=name,email=email,title=title,message=message,date=date)
        support.save()
        messages.success(request, 'Your mesaage has been sent')
        return render(request,"messagesend.html")
    return render(request,"messagesend.html")
else:
    return redirect(request,"{% url 'home' %}")

你没有给出日期时间值，所以它会出错。首先从django utils导入时区

from django.utils import timezone

并且更换了

date = models.DateTimeField(default=timezone.now)

至

date = timezone.now()