django 重写FileField的storage，完成文件重命名，并用ModelForm进行上传验证保存

本文链接：https://blog.youkuaiyun.com/weixin_33127753/article/details/81454628

本文介绍了在Django中如何重写FileField的storage实现文件上传后的重命名，并结合ModelForm进行上传验证和保存。参考了相关博客资源，详细讲解了models.py、storage.py、forms.py和view.py的实现步骤。

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models.py

class TeleplayTable(models.Model):
    tid = models.CharField(max_length=50, primary_key=True, verbose_name='ID')
    name = models.CharField(max_length=30, verbose_name='名称')
    #upload_to 会自动拼接上MEDIA_ROOT
    video = models.FileField(upload_to="teleplay",storage=VideoStorage(), max_length=100, verbose_name='影视剧')
    state = models.IntegerField(null=False, default=0, choices=((0, '未上传'),(1, '已上传')), verbose_name='视频上传状态')
    createTime = models.DateTimeField(auto_now_add=True)
    updateTime = models.DateTimeField(auto_now=True)

    class Meta:
        verbose_name = "影视剧"
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.name

新建 storage.py

from django.core.files.storage import FileSystemStorage


class VideoStorage(FileSystemStorage):
    from django.conf import settings

    def __init__(self, location=settings.MEDIA_ROOT, base_url=settings.MEDIA_URL):
        # 初始化
        super(VideoStorage, self).__init__(location, base_url)

    # 重写 _save方法
    def _save(self, name, content):
        # name为上传文件名称
        import os, time, random
        # 文件扩展名
        ext = os.path.splitext(name)[1]
        # 文件目录
        d = os.path.dirname(name)
        # 定义文件名，年月日时分秒随机数
        fn = time.strftime('%Y%m%d%H%M%S')
        fn = fn + '_%d' % random.randint(10000, 99999)
        # 重写合成文件名
        name = os.path.join(d, fn + ext)
        # 调用父类方法
        return super(VideoStorage, self)._save(name, content)

forms.py

class UploadVideoForm(forms.ModelForm):
    class Meta:
        model = TeleplayTable
        fields = ['video']

view.py

class AddTeleplayVideo(View):
    """
    上传视频
    """

    def post(self, request):
        req_teleplayID = request.POST.get('tid', '')
        if req_teleplayID:
            try:
                teleplay = TeleplayTable.objects.get(tid=req_teleplayID)
                video_form = UploadVideoForm(request.POST or None, request.FILES or None, instance=teleplay)
                if video_form.is_valid():
                    video_form.save()
                    teleplay.state=1
                    teleplay.save()
                    ……
                    #保存成功