我正在按照教程构建一个聊天室应用程序。当我进入一个房间时，url看起来像这样http://127.0.0.1:8000/chatroomname/?username=username'. 我想为每个聊天室添加不同的视频，我想在room.html模板中使用和{%if%}标记：

{% if request.get_full_path == "/roomname/" %}
                    <iframe width="560" height="315" src="https://www.youtube.com/watch?v=uilkmUoXoLU" frameborder="0" allowfullscreen></iframe>
{% endif %}

但这只有在url看起来像这样时才有效http://127.0.0.1:8000/chatroomname/，如何在if标记中添加用户名部分。
如果我添加一个示例用户名并使用该用户名访问房间，视频将不会显示。

{% if request.get_full_path == "/roomname/?username=exampleusername" %}
                    <iframe width="560" height="315" src="https://www.youtube.com/watch?v=uilkmUoXoLU" frameborder="0" allowfullscreen></iframe>
                    {% endif %}

这是其他文件的代码：

# views.py

from django.shortcuts import render

from .models import Message

def index(request):
    return render(request, 'chat/index.html')

def room(request, room_name):
    username = request.GET.get('username', 'Anonymous')
    messages = Message.objects.filter(room=room_name)[0:25]

    return render(request, 'chat/room.html', {'room_name': room_name, 'username': username, 'messages': messages})

# urls.py

from django.urls import path
from .models import Message
from . import views

urlpatterns = [
    path('', views.index, name='index'),
    path('<str:room_name>/', views.room, name='room'),
]

# models.py

from django.db import models

class Message(models.Model):
    username = models.CharField(max_length=255)
    room = models.CharField(max_length=255)
    content = models.TextField()
    date_added = models.DateTimeField(auto_now_add=True)

    class Meta:
        ordering = ('date_added',)

# routing.py

from django.urls import path

from . import consumers

websocket_urlpatterns = [
    path('ws/<str:room_name>/', consumers.ChatConsumer.as_asgi()),
]

# consumers.py

import json

from channels.generic.websocket import AsyncWebsocketConsumer
from asgiref.sync import sync_to_async

from .models import Message

class ChatConsumer(AsyncWebsocketConsumer):
    async def connect(self):
        self.room_name = self.scope['url_route']['kwargs']['room_name']
        self.room_group_name = 'chat_%s' % self.room_name

        # Join room
        await self.channel_layer.group_add(
            self.room_group_name,
            self.channel_name
        )

        await self.accept()

    async def disconnect(self, close_code):
        # Leave room
        await self.channel_layer.group_discard(
            self.room_group_name,
            self.channel_name
        )

    # Receive message from web socket
    async def receive(self, text_data):
        data = json.loads(text_data)
        message = data['message']
        username = data['username']
        room = data['room']

        await self.save_message(username, room, message)

        # Send message to room group
        await self.channel_layer.group_send(
            self.room_group_name,
            {
                'type': 'chat_message',
                'message': message,
                'username': username
            }
        )

    # Receive message from room group
    async def chat_message(self, event):
        message = event['message']
        username = event['username']

        # Send message to WebSocket
        await self.send(text_data=json.dumps({
            'message': message,
            'username': username
        }))

    @sync_to_async
    def save_message(self, username, room, message):
        Message.objects.create(username=username, room=room, content=message)