#27241: Annotate doesn't work with PostgreSQL views anymore
     Reporter:  jaap3                |                    Owner:  nobody
         Type:  Bug                  |                   Status:  new
    Component:  Database layer       |                  Version:  master
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:
     Keywords:  postgresql view      |             Triage Stage:  Accepted
  aggregate annotate                 |
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0

Comment (by jaap3):

 As far as Django is concerned these views do have a primary key (there's a
 id field, it even has a unique index). The problem is that at the database
 level this field isn't, and cannot, have a primary key constraint. Without
 a **real** primary key Postgres cannot group by primary key only, since
 they don't exist.

 This is what happens if you try to add a PK to a (materialized) view:

 ERROR:  "my_view" is not a table

Ticket URL: <https://code.djangoproject.com/ticket/27241#comment:10>
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