I believe it's a bug that's fixed in Django 1.9:
https://github.com/django/django/commit/f37c11eea3cb860112a26f8a65d823842f65b96f
On Monday, September 28, 2015 at 11:12:26 PM UTC-4, Григорий Крамаренко
wrote:
>
> In migrations I need delete constraints before creating table-partitioning.
> But Django generates different constraint names on different servers.
> On server 1:
> ALTER TABLE "order_autoselect" ADD CONSTRAINT
> "order_autoselec_summary_id_1d623f742c26ae09_fk_order_summary_id" FOREIGN
> KEY ("summary_id") REFERENCES "order_summary" ("id") DEFERRABLE INITIALLY
> DEFERRED;
>
> On server 2:
> ALTER TABLE "order_autoselect" ADD CONSTRAINT
> "order_autoselect_summary_id_2c26ae09_fk_order_summary_id" FOREIGN KEY
> ("summary_id") REFERENCES "order_summary" ("id") DEFERRABLE INITIALLY
> DEFERRED;
>
>
> Version 1.8.4 uses on all servers.
>
> The application is written for multiple installations in different
> organizations and on different servers.
> Before, in version 1.4, the constraints were created without hashes and
> were really unique. And we could write one SQL script which will be
> executed after the command "syncdb" and will 100% work everywhere. Attempt
> to migrate the app to a new Django version 1.8 turned into such problems.
>
> How make it? Or is it a bug in Django? Thanks.
>
>
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