Python 无法在django中向用户模型添加两个外键

我有一个用户模型，我扩展它来存储额外的信息。现在我有一个department表，它有两个键（外键），这两个键将与user表中的列相关。但是我犯了一个错误

这就是我尝试过的

型号.py

from django.db import models
from django.contrib.auth.models import User

from django.db.models.signals import post_save
from django.dispatch import receiver
# Create your models here.

class Profile(models.Model):
    STATUS_CHOICES = (
    (1, ("Permanent")),
    (2, ("Temporary")),
    )
    GENDER_CHOICES = (
    (1, ("Male")),
    (2, ("Female")),
    (3, ("Not Specified"))
    )
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    emp_type = models.IntegerField(choices=STATUS_CHOICES, default=1)
    contact = models.CharField(max_length=13, blank=True)
    whatsapp = models.CharField(max_length=13, blank=True)
    gender = models.IntegerField(choices=GENDER_CHOICES, default=3)
    avatar = models.ImageField(upload_to='users/images', default='users/images/default.jpg')
    manager_username = models.ForeignKey(User, blank=True, null=True, related_name='usernames', on_delete=models.DO_NOTHING)

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


@receiver(post_save, sender=User)
def create_user_profile(sender, instance, created, **kwargs):
    if created:
        Profile.objects.create(user=instance)

@receiver(post_save, sender=User)
def save_user_profile(sender, instance, **kwargs):
    instance.profile.save()


class Department(models.Model):
    id = models.IntegerField(primary_key=True)
    name = models.CharField(max_length=20, unique=True)
    manager = models.ForeignKey(User, blank=True, null=True, related_name='manager_usernames', on_delete=models.DO_NOTHING)

    tech_lead = models.ForeignKey(User, blank=True, null=True, related_name='usernames', on_delete=models.DO_NOTHING)

错误消息 错误：

但是当我是

tech\u lead=models.ForeignKey（User，blank=True，null=True，related\u name='usernames'，on\u delete=models.DO\u NOTHING）

。一切正常。谁能告诉我哪里出了问题。只有当我在数据库中添加了departments模型时，这个问题才出现，否则用户模型工作得很好

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编辑：正如我在评论中指出的那样，我把

to_字段

和

相关的_名称

搞混了。我混淆了模型中的相关\u名称与\u字段。

正如错误所述，

配置文件的相关\u名称。经理\u用户名

与

部门的相关\u名称冲突。技术负责人

。更改其中一个，使其不相同

---

（尽管我必须说，你的建模很奇怪。一个技术负责人肯定不能负责多个部门？因此这种关系应该是一对一的。为什么要将个人资料明确链接到经理，而不是部门？

如何指定与另一个表中的列相关的外键？我以为你的名字也一样，我不知道你的意思。ForeignKey是指向另一个模型的字段

related_name

是允许您从另一个模型返回到此模型的属性。

users.Department.tech_lead: (fields.E304) Reverse accessor for 'Department.tech_lead' clashes with reverse accessor for 'Profile.manager_username'.
        HINT: Add or change a related_name argument to the definition for 'Department.tech_lead' or 'Profile.manager_username'.
users.Department.tech_lead: (fields.E305) Reverse query name for 'Department.tech_lead' clashes with reverse query name for 'Profile.manager_username'.
        HINT: Add or change a related_name argument to the definition for 'Department.tech_lead' or 'Profile.manager_username'.
users.Profile.manager_username: (fields.E304) Reverse accessor for 'Profile.manager_username' clashes with reverse accessor for 'Department.tech_lead'.
        HINT: Add or change a related_name argument to the definition for 'Profile.manager_username' or 'Department.tech_lead'.
users.Profile.manager_username: (fields.E305) Reverse query name for 'Profile.manager_username' clashes with reverse query name for 'Department.tech_lead'.
        HINT: Add or change a related_name argument to the definition for 'Profile.manager_username' or 'Department.tech_lead'.