我有一个Django视图，所有用户（房东，代理和前景）都可以访问，在这个视图上，我想在我的模板上显示房产所有者的名字，但每当潜在客户用户在视图上时，我只显示None。了解这三个用户的模型与用户模型具有一对一字段关系。我也有一个与用户模型具有相同关系的配置文件模型。查看下面的视图代码：

def property_detail(request, property_id):
user = request.user
#Check if user is authenticated
if user.is_authenticated:
    #Check if user is Landlord
    if hasattr(user, 'landlord'):
        properties = Property.objects.filter(landlord=user.landlord).prefetch_related('agent').order_by('-last_updated')[:4]
        property_owner = user.landlord.profile if hasattr(user.landlord, 'profile') else None
    #Check if user is Agent
    elif hasattr(user, 'agent'):
        properties = Property.objects.filter(agent=user.agent).prefetch_related('landlord').order_by('-last_updated')[:4]
        property_owner = user.agent.profile if hasattr(user.agent, 'profile') else None
    else:
        properties = Property.objects.order_by('-last_updated')[:4]
        property_owner = None

    

    #Get the Property by its Product key from DB
    property_instance = get_object_or_404(Property, pk=property_id)

    #Send Notification to property owner
    if request.method == 'POST':
        form = MessageForm(request.POST)
        if form.is_valid():
                content = form.cleaned_data['content']
                subject = form.cleaned_data['subject']
                Message.objects.create(property=property_instance, sender=user, recipient=property_owner, subject=subject, content=content)
                messages.success(request, 'Notification sent successfully with your Contact Details.')

    else:
        form = MessageForm()
        
    context = {
        'form':form,
        'properties':properties,
        'property_owner': property_owner,
        'page_title': 'Property Detail',
        'property': property_instance,
    }
    return render(request, 'realestate/landlord_agent_property.html', context)
 # Handle the case when the user is not authenticated
logout(request)
messages.warning(request, 'Session expired. Please log in again.')
return redirect(reverse('account-login'))