auth.User.groups: (fields.E304) Reverse accessor for 'User.groups' clashes with reverse accessor for 'UserManage.groups'

Question

In my Django project I have a user_manage app.

I create a model named UserManage in my user_manage app's model.py:

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

class UserManage(AbstractUser):
    username = models.CharField(max_length=12)

Then I run:

$ python3 manage.py makemigrations

There comes the error:

ERRORS:
auth.User.groups: (fields.E304) Reverse accessor for 'User.groups' clashes with reverse accessor for 'UserManage.groups'.
        HINT: Add or change a related_name argument to the definition for 'User.groups' or 'UserManage.groups'.
auth.User.user_permissions: (fields.E304) Reverse accessor for 'User.user_permissions' clashes with reverse accessor for 'UserManage.user_permissions'.
        HINT: Add or change a related_name argument to the definition for 'User.user_permissions' or 'UserManage.user_permissions'.
users_management.UserManage.groups: (fields.E304) Reverse accessor for 'UserManage.groups' clashes with reverse accessor for 'User.groups'.
        HINT: Add or change a related_name argument to the definition for 'UserManage.groups' or 'User.groups'.
users_management.UserManage.user_permissions: (fields.E304) Reverse accessor for 'UserManage.user_permissions' clashes with reverse accessor for 'User.user_permissions'.
        HINT: Add or change a related_name argument to the definition for 'UserManage.user_permissions' or 'User.user_permissions'.

Have you mentioned `AUTH_USER_MODEL ` in `settings.py`? – Abdul Niyas P M Mar 09 '18 at 08:24 — Abdul Niyas P M, Mar 09 '18 at 08:24

score 298 · Accepted Answer · edited Feb 21 '20 at 02:26

298

Add the following to settings.py:

AUTH_USER_MODEL = "users_management.UserManage"

More generally,

AUTH_USER_MODEL = 'YourAppName.YourClassName'

YourAppName: This is the name of the app that will have the User Model
YourClassName: This is the name of the class used inside the models.py file

edited Feb 21 '20 at 02:26

eykanal

26,437
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answered Mar 09 '18 at 08:30

aircraft

25,146
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1

How can I add user from path like UsersManager.models.custom_user.User? – Ashen One Nov 19 '19 at 10:35
2

What if I need migrate first? ie: ... makemigrations users? Without AUTH_USER_MODEL I will receive the "clash" error. With AUTH_USER_MODEL: "AUTH_USER_MODEL refers to model '%s' that has not been installed" % settings.AUTH_USER_MODEL – mirek Apr 01 '20 at 08:40
To my previous comment: The reason was that inside same application with AUTH_USER_MODEL was a second model with use of get_user_model(). It was neccessary to comment out the 2nd model and make "makemigrations" in two steps. – mirek Apr 01 '20 at 09:34
I got this error `django.db.utils.ProgrammingError: relation "user_usertable" does not exist` with `user` is my app name and `UserTable` is the class inside my model – Chau Loi Aug 18 '21 at 03:56

AjayShelar · Answer 2 · 2019-04-30T10:27:47.927

30

Add this in the settings :

AUTH_USER_MODEL = 'APPNAME.User'

This way we are telling Django to use our custom model instead the default one. https://docs.djangoproject.com/en/2.2/topics/auth/customizing/#substituting-a-custom-user-model

edited Apr 30 '19 at 10:27

answered Oct 28 '18 at 07:18

AjayShelar

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Please edit your answer to add an explanation of how your code works and how it solves the OP's problem. Many StackOverflow users are newbies and will not understand the code you have posted, so will not learn from your answer. – i alarmed alien Oct 28 '18 at 14:39

Ravindrakumara · Answer 3 · 2021-02-21T04:19:09.370

9

Add this setting.py AUTH_USER_MODEL = "myapp.User"

edited Feb 21 '21 at 04:19

answered Feb 20 '21 at 18:03

Ravindrakumara

131
1
4

4

The answer is identical to the already accepted one: https://stackoverflow.com/a/49189522/5537876 – RaideR Feb 20 '21 at 18:52

score 7 · Answer 4 · answered Dec 22 '20 at 17:38

7

Add this in the settings at the end of the code :

AUTH_USER_MODEL="users.CustomUser"

answered Dec 22 '20 at 17:38

Arnab Das

149
3
3

score 7 · Answer 5 · answered Mar 25 '22 at 07:50

The solution is to first add the following line into your settings.py-

AUTH_USER_MODEL="myproject.User"

Where myproject is your project name. If you again get error then run following commands in your main directory-

python manage.py makemigrations
python manage.py migrate

This worked for me

score 2 · Answer 6 · edited Aug 25 '20 at 12:01

Just add AUTH_USER_MODEL="your app name.User" in settings.py as shown in the code below

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}
AUTH_USER_MODEL="myproject.User"
    
# Password validation
# https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators
    
AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]

score 0 · Answer 7 · answered Apr 27 '22 at 04:10

0

If above steps don´t work, delete all migrations history and your database.

Then "makemigrations" and "migrate" like it was for the first time.

The User model must be created at beginning of the project, before firts migration.

answered Apr 27 '22 at 04:10

Leo Geo

9
1

auth.User.groups: (fields.E304) Reverse accessor for 'User.groups' clashes with reverse accessor for 'UserManage.groups'

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