Custom user model in django

10,575

Solution 1

I did this in one of my project. I was surprised to see that you extended User because the doc says something else :) You can extend Django User model, but if you only want to add new fields (not change its behavior), you should use a OneToOneField.

If you wish to store information related to User, you can use a one-to-one
relationship to a model containing the fields for additional information.

So, as you can see in the link, your code should look like:

from django.contrib.auth.models import User

class MyUser(models.Model):
    user = models.OneToOneField(User)

    # Or a ForeingKey to the College table?
    college = models.CharField(max_length=40)

    other_data = ...

Solution 2

It is a good practice to keep your code generic by using get_user_model() (to get the User model that is active in your project. Defined in django.contrib.auth) and AUTH_USER_MODEL (to reference the User model) rather than directly referring to the User model.

from django.conf import settings

class MyUser(models.Model):
    user = models.OneToOneField(settings.AUTH_USER_MODEL)

    # Or a ForeingKey to the College table?
    college = models.CharField(max_length=40)

    other_data = ...

Solution 3

try removing this line in models.py:

admin.site.register(Users, UserAdmin)

I figured out your error, You have the INSTALLED_APPS in the wrong order they should be the next:

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    #'django.contrib.sites',
    #'django.contrib.messages',
    'django.contrib.staticfiles',
    # Uncomment the next line to enable the admin:
    'django.contrib.admin',
    # Uncomment the next line to enable admin documentation:
    # 'django.contrib.admindocs',
    'login',
    'forms',
)

AUTH_USER_MODEL = "login.User"

Why?

looking at the source code admin uses the User model so maybe you can think:

But my user model is into login app and this one is before admin app, therefore login is installed before admin, why it does not work?. That's because django.contrib.auth is swappable (the model can be replaced for another one in your case has been swappable by login.User) so as you created a new User Model therefore django has to change its user Model to the new one and then you have to install the rest.

How must be at the moment of run syncdb:


1.- django.contrib.auth is installed, then this see if has been swapped, if yes it adds the new field or override completely the User Model (in your case only you add a field).

2.- admin, contentypes.... your apps, are installed and all works.

How you had it:

1.- login is installed (where the new User Model was, you put the AUTH_USER_MODEL in settings)

2.- Then forms.

3.- Then django tries to install the admin app but it can't because auth_user table hasn't been added that's because django.contrib.auth was after admin, therefore there is no User Model, this one isnt's swapped and this throws the error  **admin.logentry: 'user' has a relation with model login.users, which has either 
not been installed or is abstract.**

So accordingly first you always have to install the django.contrib.auth app and then all the apps that depends from.

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Archit Verma
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Archit Verma

Updated on September 14, 2022

Comments

  • Archit Verma
    Archit Verma about 1 year

    I want to create a custom user model using django.contrib.auth.models.AbstractUser as stated in the djangodocs:

    If you’re entirely happy with Django’s User model and you just want to add some additional profile information, you can simply subclass django.contrib.auth.models.AbstractUser and add your custom profile fields. This class provides the full implementation of the default User as an abstract model.

    So I inherited the AbstractUser class in my Users class and added a field. But when I run the python manage.py syncdb I get the following error:

    CommandError: One or more models did not validate:
    admin.logentry: 'user' has a relation with model login.users, which has either 
    not been installed or is abstract.
    

    I went through other questions on stackoverflow but couldn't resolve the error. Here is my code:

    models.py

    from django.conf import settings
    from django.db import models
    from django.contrib.auth.admin import UserAdmin
    from django.contrib.auth.models import AbstractUser
    from django.contrib import admin
    
    class Users(AbstractUser):
        college = models.CharField(max_length=40)
    
    admin.site.register(Users, UserAdmin)
    

    admin.py

    from django.contrib import admin
    from django.contrib.auth.admin import UserAdmin
    from django.contrib.auth.forms import UserChangeForm, UserCreationForm
    from login.models import Users
    from django import forms
    
    class UsersChangeForm(UserChangeForm):
        class Meta(UserChangeForm.Meta):
            model = Users
    
    class UsersAdmin(UserAdmin):
        form = UsersChangeForm
    
        fieldsets = UserAdmin.fieldsets + (
                (None, {'fields': ('college',)}),
        )
    
    
    admin.site.register(Users, UsersAdmin)
    

    settings.py

    INSTALLED_APPS = (
        'forms',
        'login',
        'django.contrib.admin',
        'django.contrib.auth',
        'django.contrib.contenttypes',
        'django.contrib.sessions',
        'django.contrib.messages',
        'django.contrib.staticfiles',
    )
    
    MIDDLEWARE_CLASSES = (
        'django.contrib.sessions.middleware.SessionMiddleware',
        'django.middleware.common.CommonMiddleware',
        'django.middleware.csrf.CsrfViewMiddleware',
        'django.contrib.auth.middleware.AuthenticationMiddleware',
        'django.contrib.messages.middleware.MessageMiddleware',
        'django.middleware.clickjacking.XFrameOptionsMiddleware',
    )
    
    AUTH_USER_MODEL = 'login.users'
    

    EDIT:

    I want to store the user information in the same table as auth_user and not in a new table.

  • Archit Verma
    Archit Verma almost 10 years
    Actually I wanted to store them in the same table as auth_user
  • Archit Verma
    Archit Verma almost 10 years
    I tried it but it didn't work and I am getting the same error message
  • Victor Castillo Torres
    Victor Castillo Torres almost 10 years
    HOw did you order the INSTALLED_APPS? Is admin after auth?
  • Archit Verma
    Archit Verma almost 10 years
    yup I ordered it the same way you mentioned
  • Victor Castillo Torres
    Victor Castillo Torres almost 10 years
    Do you have a foreign Key to User in the forms app?
  • Charlesliam
    Charlesliam almost 10 years
    in Django 1.5 you don't need additional table to extend User table.
  • Charlesliam
    Charlesliam almost 10 years
    @Victor, I extended the default User table by using AbstractUser. The admin run smoothly but when I try to add new user after clicking save I'm getting an error ORA-00942: table or view does not exist, yet I have a table in my Oracle db and I have it on my Model.py.
  • Archit Verma
    Archit Verma almost 10 years
    @Victor I don't have any foriegn key to User in forms app
  • Victor Castillo Torres
    Victor Castillo Torres almost 10 years
    @ArchitVerma I think you have a problem in another place, add me to facebook to see the problem
  • Charlesliam
    Charlesliam almost 10 years
    I created a synonyms for my current table CCAD'.CCAD_OFFICIAL_RECEIPT` to OFFICIAL_RECEIPT. It's giving me an error if I try to duplicate the table name. So far my problem with saving was caused by DJANGO_ADMIN_LOG table with a foreign key field name user_id still referencing the old AUTH_USER table. I change there reference to my new NAFD_USER. It's now saving properly. But when I try to delete record i still get this error ORA-00942: table or view does not exist. Weird..This problem only occured after upgrading from django 1.4.1 to 1.6.><
  • Lara
    Lara over 7 years
    @Nil, could you please check this question? :) stackoverflow.com/q/36191737/3350765