#12288: Validate that values in INSTALLED_APPS are unique
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     Reporter:  Piotr Czachur        |                    Owner:  susan
  <zimnyx@…>                         |                   Status:  closed
         Type:                       |                  Version:  master
  Cleanup/optimization               |               Resolution:  fixed
    Component:  Core (Other)         |             Triage Stage:  Accepted
     Severity:  Normal               |      Needs documentation:  0
     Keywords:  sprint200912         |  Patch needs improvement:  0
    Has patch:  0                    |                    UI/UX:  0
  Needs tests:  0                    |
Easy pickings:  1                    |
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Comment (by mjtamlyn):

 Also worth noting that this patch does not actually prevent the issue
 discussed - you can just as easily create a `User` model with an
 `app_label` of `auth`, and have just as much of a problem. Can we not
 apply this validation at the app cache level if this is what we're trying
 to avoid? The first patch is good as it catches easy mistakes, the second
 seems overkill. I'm not sure it's a pattern we should encourage, perhaps
 print a warning on server start, but I think it should be allowed.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/12288#comment:34>
Django <https://code.djangoproject.com/>
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