我正在做一个Django项目，我有房东，代理和前景用户，我想在用户登录时检查用户类型，以确定用户类型并适当地重定向用户，但我的代码不能正常工作。即使有效用户尝试登录，视图也会重定向回登录页。有些人应该帮助兄弟。
型号：

class Landlord(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    is_verified = models.BooleanField(default=False) 

    def __str__(self):
        return self.user.username


class Agent(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    is_verified = models.BooleanField(default=False)

    def __str__(self):
        return self.user.username

class Prospect(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE, related_name='prospect_profile')
    payment_ref = models.CharField(max_length=100, blank=True, null=True)
    payment_status = models.BooleanField(default=False)
    properties = models.ManyToManyField('Property', through='Tenancy')

    def __str__(self):
        return self.user.username

    def become_tenant(self, property):
        if self.payment_status:
            tenant = Tenancy.objects.create(tenant=self, property=property, agent=property.agent, landlord=property.landlord)
            return tenant
        else:
            return None

class Tenancy(models.Model):
    tenant = models.ForeignKey(Prospect, on_delete=models.CASCADE)
    property = models.ForeignKey('Property', on_delete=models.CASCADE)
    agent = models.ForeignKey('Agent', on_delete=models.CASCADE)
    landlord = models.ForeignKey('Landlord', on_delete=models.CASCADE)
    start_date = models.DateField()
    end_date = models.DateField()

    def __str__(self):
        return f'{self.tenant} - {self.property}'

    class Meta:
        verbose_name_plural = 'Tenancies'

查看代码：

def index(request):
    user = request.user

    if user:
        # Check if User Profile is completed with new image uploaded 
        def profile_complete(profile):
                    return (
                profile.full_name is not None and profile.full_name != '' and
                profile.phone_number is not None and profile.phone_number != '' and
                profile.email is not None and profile.email != '' and
                profile.address is not None and profile.address != '' and
                profile.image is not None and profile.image != 'avatar.jpg'
            )
        #Check if user is either a Landlord, Agent, or Prospect and Profile is completed and they have unread messages
        if Landlord.user == user or Agent.user == user:
            try:
                profile = Profile.objects.select_related('user').get(user=user)
                if not profile_complete(profile):
                    return redirect('account-profile-update')
                elif user.landlord == 'landlord':
                    # Get all logged in landlord Properties
                    landlord_properties = Property.objects.filter(landlord__user=user)
                    if not landlord_properties.exists():
                        return redirect('add-property')
                    # Check if landlord has any notifications with status False
                    elif Message.objects.filter(property__landlord=user.landlord, status=False).exists():
                        return redirect('inbox')
                    else:
                        return redirect('property-listing')
                elif Agent.user == user:
                    # Get all the logged in Agent Properties
                    agent_properties = Property.objects.filter(agent__user=user)
                    if not agent_properties.exists():
                        return redirect('add-property')
                    # Check ifagent has any notifications with status False
                    elif Message.objects.filter(property__agent=user.agent, status=False).exists():
                        return redirect('inbox') 
                    else:
                        return redirect('property-listing')
            except (Landlord.DoesNotExist, Agent.DoesNotExist): 
                pass
        #Check if user is Prospect and Profile is completed
        elif Prospect.user == user:
            try:
                #Match the logged in user with users in the Profile DB
                prospect_profile = Profile.objects.get(user=user)
                #Check if Prospect Profile is completed and redirect
                if not profile_complete(prospect_profile):
                    return redirect('account-profile-update')
                elif Message.objects.filter(recipient=user, status=False).exists():
                    return redirect('inbox')
                else:
                    return redirect('listings')
            except Prospect.DoesNotExist:
                pass

    request.session['user_type'] = 'default'
    return redirect('account-login')