如何通过DJANGO REST API从模型中检索和创建数据？

我是Django和Django Rest框架的新手，所以我需要一些帮助

我想从Django中的模型接收时间数据。如果没有为特定用户存储时间，它应该创建它，保存在我的模型中，并返回该时间数据。我还使用简单的JWT进行令牌身份验证，这意味着没有有效的令牌，任何人都无法访问数据库

这是我目前的代码：

型号。py:

class Mymodel(models.Model):
    emp= models.ForeignKey(User, on_delete = models.CASCADE)
    time = models.DateTimeField()

def get_time(request):
    if (request.method == 'GET'):
        tk = request.GET.get('token') #token stored in LocalStorage
        headers = {'Authorization': 'Bearer ' + tk}
        url = 'http://127.0.0.1:8000/my_api/'
        response = requests.get(url, headers)
        if response:
            user_id = User.objects.get(username=request.GET.get('username')).pk
            user = User.objects.get(id = user_id)
            if not Mymodel.objects.filter(emp=user).exists():
                current_time = timezone.now()
                create_time = Mymodel.objects.create(emp=user, time=current_time)
                data = create_time.time
        return HttpResponse(data)

class MyAPI(generics.ListAPIView):
    permission_classes = [IsAuthenticated]  #need to pass in JWT token in order to access the model.
    serializer = MySerializer
    def get_queryset(self):
        user_id = User.objects.get(username=request.GET.get('username')).pk
        user = User.objects.get(id = user_id)
        user_data = Mymodel.objects.all()
        queryset = user_data.filter(id=user_id)
        return queryset

class MySerializer(serializers.ModelSerializer):

    class Meta:
        model = Mymodel
        fields = ('time')

视图。py:

class Mymodel(models.Model):
    emp= models.ForeignKey(User, on_delete = models.CASCADE)
    time = models.DateTimeField()

def get_time(request):
    if (request.method == 'GET'):
        tk = request.GET.get('token') #token stored in LocalStorage
        headers = {'Authorization': 'Bearer ' + tk}
        url = 'http://127.0.0.1:8000/my_api/'
        response = requests.get(url, headers)
        if response:
            user_id = User.objects.get(username=request.GET.get('username')).pk
            user = User.objects.get(id = user_id)
            if not Mymodel.objects.filter(emp=user).exists():
                current_time = timezone.now()
                create_time = Mymodel.objects.create(emp=user, time=current_time)
                data = create_time.time
        return HttpResponse(data)

class MyAPI(generics.ListAPIView):
    permission_classes = [IsAuthenticated]  #need to pass in JWT token in order to access the model.
    serializer = MySerializer
    def get_queryset(self):
        user_id = User.objects.get(username=request.GET.get('username')).pk
        user = User.objects.get(id = user_id)
        user_data = Mymodel.objects.all()
        queryset = user_data.filter(id=user_id)
        return queryset

class MySerializer(serializers.ModelSerializer):

    class Meta:
        model = Mymodel
        fields = ('time')

序列化程序。py:

class Mymodel(models.Model):
    emp= models.ForeignKey(User, on_delete = models.CASCADE)
    time = models.DateTimeField()

def get_time(request):
    if (request.method == 'GET'):
        tk = request.GET.get('token') #token stored in LocalStorage
        headers = {'Authorization': 'Bearer ' + tk}
        url = 'http://127.0.0.1:8000/my_api/'
        response = requests.get(url, headers)
        if response:
            user_id = User.objects.get(username=request.GET.get('username')).pk
            user = User.objects.get(id = user_id)
            if not Mymodel.objects.filter(emp=user).exists():
                current_time = timezone.now()
                create_time = Mymodel.objects.create(emp=user, time=current_time)
                data = create_time.time
        return HttpResponse(data)

class MyAPI(generics.ListAPIView):
    permission_classes = [IsAuthenticated]  #need to pass in JWT token in order to access the model.
    serializer = MySerializer
    def get_queryset(self):
        user_id = User.objects.get(username=request.GET.get('username')).pk
        user = User.objects.get(id = user_id)
        user_data = Mymodel.objects.all()
        queryset = user_data.filter(id=user_id)
        return queryset

class MySerializer(serializers.ModelSerializer):

    class Meta:
        model = Mymodel
        fields = ('time')

---

我只想从我的表中读取数据，并检查用户是否有时间。如果没有，它应该在模型中创建时间。但是，我错在哪里呢？我是否正确地传递了承载令牌，API结构是否正确？提前谢谢你

首先，在模型中同时使用基于django方法和基于类的视图并不是最好的做法，只需auto_now=True即可

class Mymodel(models.Model):
    emp= models.ForeignKey(User, on_delete = models.CASCADE)
    time = models.DateTimeField(auto_now=True)

创建实例时，它将自动填充，您无需执行以下操作：

create_time = Mymodel.objects.create(emp=user, time=current_time)