#27746: Database migration fail when removing a child model containing only foreignkeys in a multi-table inheritance context on MySQL -------------------------------+------------------------------------ Reporter: David CHANIAL | Owner: nobody Type: Bug | Status: new Component: Migrations | Version: master 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 -------------------------------+------------------------------------
Comment (by Simon Charette): Replying to [comment:3 Tim Graham]: > I thought the conclusion of ticket:24424#comment:11 was that it's also an issue with the autodetector. Indeed but the only way we'll be able to solve #24424 is by teaching the auto-detector to either issue an `AlterField` or a combination of equivalent operations instead of a `RemoveField` + `AddField` in order to convert the `id` auto-incrementing field primay key to integer foreign key primary key. There's a side discussion about the issue encountered here from comments 19 to 22 on #24424. I believe the solution here would be to teach field operations to optimize the `[FieldOperation('model', 'field'), RemoveModel('model')]` case to `[RemoveModel("model')]`. -- Ticket URL: <https://code.djangoproject.com/ticket/27746#comment:4> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To post to this group, send email to django-updates@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/064.4780ab4c9408841acd4c68b41e4d7a92%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.