Re: [Django] #36128: Document the necessity of adding unique constraints to related models in intermediary m2m model. (was: Lack of constraint validation in admin Inline with many-to-many intermediary model leads to IntegrityError)

[Django]

#36128: Document the necessity of adding unique constraints to related models in
intermediary m2m model.
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Reporter: Guillaume LEBRETON | Owner: Clifford
| Gama
Type: Bug | Status: assigned
Component: Documentation | Version: 5.1
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Changes (by Clifford Gama):

* summary:
Lack of constraint validation in admin Inline with many-to-many
intermediary model leads to IntegrityError
=>
Document the necessity of adding unique constraints to related models
in intermediary m2m model.

Comment:

The lack of constraint validation in admin is a duplicate of #35676 and is
solved by Simon Charette's patch in that ticket.

Repurposing this ticket for the documentation.
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Ticket URL: <https://code.djangoproject.com/ticket/36128#comment:4>
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