#29182: SQLite database migration breaks ForeignKey constraint, leaving
<table_name>__old in db schema
----------------------------------+------------------------------------
     Reporter:  ezaquarii         |                    Owner:  nobody
         Type:  Bug               |                   Status:  new
    Component:  Migrations        |                  Version:  2.0
     Severity:  Release blocker   |               Resolution:
     Keywords:  sqlite migration  |             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):

 I did a bit of investigation on my side and there must be something else
 at play here as I cannot reproduce against `stable/2.1.x` and `master`
 with SQLite version 3.22.0 2018-01-22 18:45:57 and `sqlite3.version` 2.6.0
 on Python 3.6.6.


 {{{
 $ sqlite3 project/db.sqlite3
 SQLite version 3.22.0 2018-01-22 18:45:57
 Enter ".help" for usage hints.
 sqlite> .schema
 CREATE TABLE IF NOT EXISTS "django_migrations" ("id" integer NOT NULL
 PRIMARY KEY AUTOINCREMENT, "app" varchar(255) NOT NULL, "name"
 varchar(255) NOT NULL, "applied" datetime NOT NULL);
 CREATE TABLE sqlite_sequence(name,seq);
 CREATE TABLE IF NOT EXISTS "ticket_29182_filecontent" ("id" integer NOT
 NULL PRIMARY KEY AUTOINCREMENT);
 CREATE TABLE IF NOT EXISTS "ticket_29182_playbook" ("id" integer NOT NULL
 PRIMARY KEY AUTOINCREMENT, "file_id" integer NOT NULL REFERENCES
 "ticket_29182_file" ("id") DEFERRABLE INITIALLY DEFERRED);
 CREATE TABLE IF NOT EXISTS "ticket_29182_file" ("id" integer NOT NULL
 PRIMARY KEY AUTOINCREMENT, "content_id" integer NOT NULL REFERENCES
 "ticket_29182_filecontent" ("id") DEFERRABLE INITIALLY DEFERRED);
 CREATE INDEX "ticket_29182_playbook_file_id_f3bc0e50" ON
 "ticket_29182_playbook" ("file_id");
 CREATE INDEX "ticket_29182_file_content_id_7815674c" ON
 "ticket_29182_file" ("content_id");
 }}}

 I also couldn't get a regression test to fail either. Florian could you
 confirm one of these added tests fail for you on your local setup:
 https://github.com/django/django/compare/master...charettes:ticket-29182

-- 
Ticket URL: <https://code.djangoproject.com/ticket/29182#comment:15>
Django <https://code.djangoproject.com/>
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