I have been trying to make search_fields able to search for fields in another table on the django admin page. I discovered that I could use a function to achieve my goal, but when I went to the admin page, in place of the data I wanted it to display, it would display <django.db.models.query_utils.DeferredAttribute object at 0x00000208375C9280>

Here is my admin.py file:

from django.contrib import admin
from .models import RiskRegister, Category, Severity, RSev
from account.models import Account

class RiskRegisterAdmin(admin.ModelAdmin):
    list_display = ['id', 'user', 'user_dept', 'date', 'category', 'roles', 'responderID', 'severity',
                    'action_taken_explanation', 'created_at']
    list_filter = ['id', 'user', 'date', 'category', 'roles', 'responderID', 'severity', 'action_taken_explanation']
    search_fields = ['id', 'user', 'user_dept', 'date', 'category', 'roles', 'responderID', 'severity', 'created_at']
    def user_dept(self, obj):
        return Account.department

And my models.py file containing the Account model:

class Account(AbstractBaseUser, PermissionsMixin):
    username        = models.CharField(max_length=150, unique=True)
    email           = models.EmailField(verbose_name='email', max_length=254, unique=True)
    department      = models.CharField(verbose_name='department', max_length=100, editable=True)
    first_name      = models.CharField(verbose_name='first name', max_length=254, blank=True)
    last_name       = models.CharField(verbose_name='last name', max_length=254, blank=True)
    date_joined     = models.DateTimeField(verbose_name='date joined', auto_now_add=True)
    last_login      = models.DateTimeField(verbose_name='last login', auto_now=True)
    is_active       = models.BooleanField(default=True)
    is_admin        = models.BooleanField(default=False)
    is_staff        = models.BooleanField(default=False)
    is_superuser    = models.BooleanField(default=False)

How can I make it display what is in the department?

CodePudding user response：

The obj is the model object here, you can this present this with obj.user.department:

class RiskRegisterAdmin(admin.ModelAdmin):
    list_display = ['id', 'user', 'user_dept', 'date', 'category', 'roles', 'responderID', 'severity',
                    'action_taken_explanation', 'created_at']
    list_filter = ['id', 'user', 'date', 'category', 'roles', 'responderID', 'severity', 'action_taken_explanation']
    search_fields = ['id', 'user', 'user_dept', 'date', 'category', 'roles', 'responderID', 'severity', 'created_at']
    
    def user_dept(self, obj):
        return obj.user.department

You can boost efficiency with a .select_related(…) clause [Django-doc]:

class RiskRegisterAdmin(admin.ModelAdmin):
    # ⋮
    
    def get_queryset(self, request):
        qs = super().get_queryset(request).select_related('user')