#29998: pk setup for MTI to parent get confused by multiple OneToOne references.
     Reporter:  Mārtiņš Šulcs        |                    Owner:  nobody
         Type:  Bug                  |                   Status:  new
    Component:  Database layer       |                  Version:  2.1
  (models, ORM)                      |
     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
Changes (by Simon Charette):

 * stage:  Unreviewed => Accepted


 That seems to be a bug, managed to reproduce.

 Does the error go away if you add `primary_key=True` to `document_ptr`
 like I assume you wanted to do? This makes me realized that the
 inheritance MTI documentation] is not completely correcy,
 the automatically added `place_ptr` field end up with `primary_key=True`].

 Not sure why we're not checking `and field.remote_field.parent_link` on
 parent links connection].

Ticket URL: <https://code.djangoproject.com/ticket/29998#comment:1>
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