无法在Django中向用户模型添加两个外键

Question

我有一个用户模型，已经扩展了它可以存储更多信息。现在，我有一个部门表，其中有两个键（外部），它们与用户表中的列相关。但是我遇到了错误。

这是我尝试过的

models.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：

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'.

但是当我tech_lead = models.ForeignKey(User, blank=True, null=True, related_name='usernames', on_delete=models.DO_NOTHING)时，此行。一切正常。谁能告诉我我要去哪里错了。仅当我在数据库中添加了部门模型时才出现此问题，否则用户模型运行良好。

Answer 1

正如错误所言，Profile.manager_username的related_name与Department.tech_lead的related_name冲突。更改其中之一，使它们不相同。

（（尽管我必须说，您的建模很奇怪。技术主管肯定不能负责一个以上的部门吗？因此这种关系应该一对一。为什么要明确地将个人档案与经理联系起来，而不是而不是部门？]