poli_planning/polyclinic_scheduling/apps/employee/admin.py

from django.contrib import admin
from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
from django.contrib.auth.models import User
from django.utils.translation import gettext_lazy as _

from .models import Employee

# Define an inline admin descriptor for Employee model
# which acts a bit like a singleton
class EmployeeInline(admin.StackedInline):
    model = Employee
    can_delete = False
    verbose_name_plural = _('employee')

# Define a new User admin
class UserAdmin(BaseUserAdmin):
    inlines = (EmployeeInline,)

# Re-register UserAdmin
admin.site.unregister(User)
admin.site.register(User, UserAdmin)