[英]Get user's last message django-postman & Rest API
我一直在安裝 Django-Postman 用戶到用戶消息 package。 我正在嘗試使用 Rest API 獲取用戶的最后一條消息。
你可以在這里查看 django-postman package: https://pypi.org/project/django-postman/
models.py 的一部分
class Message(models.Model):
"""
A message between a User and another User or an AnonymousUser.
"""
SUBJECT_MAX_LENGTH = 120
subject = models.CharField(_("subject"), max_length=SUBJECT_MAX_LENGTH)
body = models.TextField(_("body"), blank=True)
sender = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='sent_messages',
null=True, blank=True, verbose_name=_("sender"))
recipient = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='received_messages',
null=True, blank=True, verbose_name=_("recipient"))
sent_at = models.DateTimeField(_("sent at"), default=now)
objects = MessageManager()
視圖.py
class InboxLastMessagesViewSet(viewsets.ModelViewSet):
serializer_class = InboxLastMessagesSerializer
authentication_classes = (JSONWebTokenAuthentication,)
permission_classes = (IsAuthenticated,)
def get_queryset(self):
user = self.request.user
return Message.objects.filter(Q(sender=user) | Q(recipient=user)).order_by('sender')
序列化程序.py
class InboxLastMessagesSerializer(serializers.ModelSerializer):
senderusername = serializers.CharField(source='sender.username', read_only=True)
reciusername = serializers.CharField(source='recipient.username', read_only=True)
sonmesaj = serializers.SerializerMethodField()
def get_lastmessage(self, obj):
/// I'M TRYING TO CREATE A FUNCTION ON HERE FOR GET SENDER'S LAST MESSAGE ////
lastmsg = obj.latest('sent_at')
return dict(body=lastmsg)
class Meta:
model = Message
fields = ('senderusername', 'reciusername', 'body', 'sent_at', 'lastmessage')
我想要一個像這樣的 output :
{
"senderusername": "user",
"reciusername": "user2",
"body": "Actually that is not last message",
"sent_at": "2019-01-19T23:08:54Z",
"lastmessage": {
"body": "That's conversation's last message!"
}
},
{
"senderusername": "user",
"reciusername": "user2",
"body": "I said that is not last message",
"sent_at": "2021-05-10T23:09:42Z",
"lastmessage": {
"body": "That's conversation's last message!"
}
},
您可以像這樣收到最后一條消息:
def get_lastmessage(self, obj):
lastmsg = Message.objects.latest('sent_at')
data = {'senderusername': obj.senderusername,
'reciusername': obj.reciusername,
'body': lastmsg.body
'sent_at': lastmsg.sent_at
'last_message': {
'body': lastmsg.body
}
}
return data
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