Opened 2 months ago
Closed 2 months ago
#35729 closed New feature (invalid)
How to serialize user profiles without natural keys?
Reported by: | Jonas Dittrich | Owned by: | |
---|---|---|---|
Component: | contrib.auth | Version: | dev |
Severity: | Normal | Keywords: | |
Cc: | Triage Stage: | Unreviewed | |
Has patch: | no | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | no | UI/UX: | no |
Description
We want to have a custom UserProfile that inherits from AbstractBaseUser without the need to define a natural key. There should be a nice way to do this.
Our custom UserProfile inherits from AbstractBaseUser. We don't have any possible unique field combination that we could use as a natural_key
. (Our USERNAME_FIELD
is not unique. It's an email that might be NULL for multiple users)
When dumping data, we want to use natural_foreign=True
and natural_primary=True
matching the
documentation recommendations, see https://docs.djangoproject.com/en/5.1/topics/serialization/#natural-keys.
Now, AbstractBaseUser
defines the natural_key
function to return the value of USERNAME_FIELD
and there doesn't seem to be an alternative implementation in our derived class.
Is there a way to dump our data using natural_foreign=True
and natural_primary=True
without serializing the user profile with natural keys?
What we tried so far:
- making natural_key just return
(pk,)
. This does not work. The pk of the user profile is not serialized because the model definesnatural_key
and django excludes the pk from the list of dumped fields when anatural_key
exists, see https://github.com/django/django/blob/c6a4f853c7167c1001761dcff30d7a64690e8236/django/core/serializers/python.py#L37. - overwriting
__getattribute__
on the user profile, raising anAttributeError
whennatural_key
is requested. M2M fields callhasattr
on the class, not on the instance which has the modified__getattribute__
function. - trying to delete the
natural_key
function from our user profile class usingdel
anddelattr
.hasattr
finds the function from the superclass; our user profile does not define thenatural_key
function.
Basically the problem is that removing the natural_key
function from the child class violates Liskov's substitution principle.
In theory, we could del AbstractBaseUser.natural_key
but this deeply interferes with Django; we don't want to do that.
Change History (1)
comment:1 by , 2 months ago
Component: | Uncategorized → contrib.auth |
---|---|
Resolution: | → invalid |
Status: | new → closed |
Type: | Uncategorized → New feature |
Version: | 5.1 → dev |
Hello Jonas, thank you for your ticket!
This report seems better suited to be a support request. The best place to get answers to your issue is using any of the user support channels from this link.
Since the goal of this issue tracker is to track issues about Django itself, and this report is about how to use Django for a specific niche need, I'll be closing this ticket as
invalid
following the ticket triaging process. If, after debugging or further conversations in the forum, you find out that this is indeed a bug in Django, please re-open with the specific details and please be sure to include a small Django project to reproduce or a failing test case.