Question

我的数据库中有3个表。用户 sessiontokens 3.发布

我使用外键在sessiontoken和post中引用用户表。如果查询存在，我想检查accessstoken表，并从中获取相应的user_id值。

模型

class User(models.Model):
    email = models.EmailField()
    name = models.CharField(max_length=30)
    username = models.CharField(max_length=20)
    password = models.CharField(max_length=100)
    created_on = models.DateTimeField(auto_now_add=True)
    updated_on = models.DateTimeField(auto_now=True)


class SessionToken(models.Model):
    user = models.ForeignKey(User)
    session_token = models.CharField(max_length=255)
    created_on = models.DateTimeField(auto_now_add=True)
    is_valid = models.BooleanField(default=True)

    def create_token(self):
        self.session_token = uuid.uuid4()


class Post(models.Model):
    user = models.ForeignKey(User)
    image = models.FileField(upload_to='user_images')
    caption = models.CharField(max_length=240)
    image_url = models.CharField(max_length=255)
    created_on = models.DateTimeField(auto_now_add=True)

以下是发生的事情，每次用户登录时都会生成session_token。然后我们使用以下功能检查用户是否立即登录。

def check_validation(request):
if request.COOKIES.get('session_token'):
    session = SessionToken.objects.filter(session_token=request.COOKIES.get('session_token'))
    if session:
        return session
else:
    return None

我想在post表中设置user_id来匹配来自上面函数的sessiontoken中的user_id

def upload_view(request):
    usr = check_validation(request)

    if usr:
        if request.method == "GET":
            form = PostForm()
            return render(request, 'upload.html', {'form': form})
        elif request.method == "POST":
            form = PostForm(request.POST, request.FILES)
            if form.is_valid():
                pic = form.cleaned_data.get('image')
                title = form.cleaned_data.get('caption')
                post = PostForm().instance

                post.user = usr 

                post.image = pic
                post.caption = title

在django中使用外键访问表的值

0 个答案: