We have a Django application that is connecting to multiple MS SQL database instances. There is a router.py for each app that handles routing the processes to each database.
This is my first time setting up multiple database access.
Django built-in apps are routed to the default database via this router.py:
class DjangoRouter(object):
"""
A router to control all database operations on models in the
auth application.
"""
def db_for_read(self, model, **hints):
"""
Attempts to read auth models go to auth.
"""
app_list = ('auth', 'admin', 'contenttypes', 'sessions',)
if model._meta.app_label in app_list:
return 'default'
return None
def db_for_write(self, model, **hints):
"""
Attempts to write auth models go to auth.
"""
app_list = ('auth', 'admin', 'contenttypes', 'sessions',)
if model._meta.app_label in app_list:
return 'default'
return None
def allow_relation(self, obj1, obj2, **hints):
"""
Allow relations if a model in the auth app is involved.
"""
app_list = ('auth', 'admin', 'contenttypes', 'sessions',)
if obj1._meta.app_label in app_list and obj2._meta.app_label in app_list:
return True
return None
def allow_migrate(self, db, app_label, model=None, **hints):
"""
Make sure the auth app only appears in the 'auth'
database.
"""
app_list = ('auth', 'admin', 'contenttypes', 'sessions',)
if app_label in app_list:
return db == 'default'
return None
We are using LDAP authentication and Django's built-in authentication. The idea is that intranet users can authenticate against our AD server. External users can register, and will be authenticated with Django's authentication.
When I have the default database set to:
'default': {
'ENGINE': 'sql_server.pyodbc',
'NAME': 'Django',
'USER': '',
'PASSWORD': '',
'HOST': 'sqlbeta',
'PORT': '',
},
LDAP works, but I cannot add user to Django's authentication. The admin displays a "success" message, but the user is not added to the database.
If I switch the default database back to SQLLite, I am able to authenticate against AD and add Django users.
So, I don't think it is an issue with the routers.py file. I worry that it might be an issue with the 'sql_server.pyodbc' engine.
EDIT: Per request, here are the database settings:
DATABASES = {
# 'default': {
# 'ENGINE': 'django.db.backends.sqlite3',
# 'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
# },
'default': {
'ENGINE': 'sql_server.pyodbc',
'NAME': 'Django',
'USER': '',
'PASSWORD': '',
'HOST': 'sqlbeta',
'PORT': '',
},
'master': {
'ENGINE': 'sql_server.pyodbc',
'NAME': 'master',
'USER': '',
'PASSWORD': '',
'HOST': 'sqlbeta',
'PORT': '',
},
'databaseone': {
'ENGINE': 'sql_server.pyodbc',
'NAME': 'databaseone',
'USER': '',
'PASSWORD': '',
'HOST': 'sqlbeta',
'PORT': '',
},
'databasetwo': {
'ENGINE': 'sql_server.pyodbc',
'NAME': 'databasetwo',
'USER': '',
'PASSWORD': '',
'HOST': 'sqlbeta',
'PORT': '',
},
}
NOTE: I think this might have to do with the way Django saves new users. Going to take a look there. I am able to use the createsuperuser command to add more superusers while both authentication backends are in place. Confirmed, I can create regular users via the shell, but not through the admin.
Follow up note: Still have not sourced the problem with the admin, but I found that I could add users via a form. I'm thinking the problem must be a bug in the admin.
Edit:
Per @AndrewSmiley's request:
class UserCreationForm(forms.ModelForm):
"""
A form that creates a user, with no privileges, from the given username and
password.
"""
error_messages = {
'password_mismatch': _("The two password fields didn't match."),
}
password1 = forms.CharField(label=_("Password"),
widget=forms.PasswordInput)
password2 = forms.CharField(label=_("Password confirmation"),
widget=forms.PasswordInput,
help_text=_("Enter the same password as above, for verification."))
class Meta:
model = User
fields = ("username",)
def clean_password2(self):
password1 = self.cleaned_data.get("password1")
password2 = self.cleaned_data.get("password2")
if password1 and password2 and password1 != password2:
raise forms.ValidationError(
self.error_messages['password_mismatch'],
code='password_mismatch',
)
return password2
def save(self, commit=True):
user = super(UserCreationForm, self).save(commit=False)
user.set_password(self.cleaned_data["password1"])
if commit:
user.save()
return user
UPDATE:
Per @user1797792 suggestions, I created a custom UserCreationForm to set the date_joined value, but we are still unable to add users via the Django Admin.
Relevant forms.py & admin.py entries are below:
class CustomUserCreationForm(UserCreationForm):
now = timezone.now()
class Meta:
model = User
fields = ('username',)
def save(self, commit=True):
user = super(CustomUserCreationForm, self).save(commit=False)
user.date_joined = self.now
if commit:
user.save()
return user
class CustomUserAdmin(UserAdmin):
add_form = CustomUserCreationForm
admin.site.unregister(User)
admin.site.register(User, CustomUserAdmin)
