Re: Migrations

On 14/03/2017 12:25 AM, Matthew Pava wrote:
> My problems this time around came from a circular dependency

I have encountered that but I blame myself for asking too much of
migrations. I have renamed a model and table successfully using
migrations and I believe that led to the circular dependency when I
tried to squash.

My project is SaaS in nature so I have control of all instances of the
database. My plan is to choose a moment in time when the entrails
indicate good fortune awaits the bold and I'll delete *all* migrations
except for the Django ones and remove the records from the
django_migrations table and do a fake initial migration.

Naturally I'll prepare well with a brute-force recovery in mind and ...
I have never believed I would ever want to roll my project back to a
previous incarnation so losing all the migrations is a price I'm
prepared to pay.

Cheers

Mike

> that squashmigrations caused. I have had issues in the past with removing a field from a model and basically having a simple pass statement for the model. I saw a ticket or some discussion somewhere about that issue elsewhere. I also have had issues when renaming models, especially since the apps in my project are so interdependent on each other. But I already saw a ticket for part of that issue that is currently unresolved. It is related to using a string to relate a ForeignKey instead of the model object itself. The other aspect of that issue was that the makemigrations commands added so many unnecessary operations that just caused the migrate command to break. And after applying the new migrations to the production code, it works fine until I apply the migrations again, stating that it can't find the field that I already renamed.
>
> I apologize for my earlier generalization, but, as you can see, I have had a struggle with migrations in general, and I have generally tried to let Django do the work in generating them.
>
> -----Original Message-----
> From: django-users@googlegroups.com [mailto:django-users@googlegroups.com] On Behalf Of Mike Dewhirst
> Sent: Saturday, March 11, 2017 1:23 AM
> To: django-users@googlegroups.com
> Subject: Re: Migrations
>
> On 11/03/2017 7:17 AM, Matthew Pava wrote:
>> Does anyone else get a migraine when working migrations?
>>
> Only when I try to game them. If I follow instructions they are magnificent. That said, what are your problems?
>
> Mike
>
>
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