Re: [Django] #33586: Applying RunPython backward results in ValueError when involved models are referenced through multiple foreign keys (was: Cannot delete object (A) referenced by another object (B) if said object (A) has a foreign key to a custom user.)

[Django]

#33586: Applying RunPython backward results in ValueError when involved models are
referenced through multiple foreign keys
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Reporter: Jeremy Poulin | Owner: (none)
Type: Bug | Status: new
Component: Migrations | Version: 4.0
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 1 | Patch needs improvement: 1
Easy pickings: 0 | UI/UX: 0
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Changes (by Simon Charette):

* summary:
Cannot delete object (A) referenced by another object (B) if said
object (A) has a foreign key to a custom user.
=>
Applying RunPython backward results in ValueError when involved models
are referenced through multiple foreign keys

Comment:

#36161 was a duplicate that demonstrated the problem can be triggered even
without a custom user model.

I'm going to rename this ticket to better capture the generic nature of
the problem.
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Ticket URL: <https://code.djangoproject.com/ticket/33586#comment:29>
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