#30741: sqlmigrate doesn't show a drop constraint SQL when previous create
constrain operation wasn't perform.
-------------------------------------+-------------------------------------
     Reporter:  Scott Stafford       |                    Owner:  nobody
         Type:  Bug                  |                   Status:  closed
    Component:  Migrations           |                  Version:  master
     Severity:  Normal               |               Resolution:
                                     |  worksforme
     Keywords:  db_constraint,       |             Triage Stage:
  migrations                         |  Unreviewed
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
-------------------------------------+-------------------------------------

Comment (by Scott Stafford):

 Ah, yes, it appears the issue with introspection probably has to do with
 our use of Postgres schemas.  The table/constraint in question is in a
 non-public schema
 think I figured out what the issue is.  In our setup, we use Postgres
 schemas.  When I set up the test example, I was lazy and used our existing
 database and just let it create the tables right in there -- the new
 `parent` table picked up the custom schema and that is somehow
 interfering.  When I retested after you said you couldn't repro, I made a
 brand new database and then it worked as expected.

 Would you still consider this a bug, or are we no longer "under warranty"
 using schemas like this?  If yes, I can try and set up a usable
 reproduction project, and alter the title of the bug...

-- 
Ticket URL: <https://code.djangoproject.com/ticket/30741#comment:5>
Django <https://code.djangoproject.com/>
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