Re: quasi-distributed system sharing data in django

On 6/10/2016 7:40 AM, Ricardo Pascal wrote:
> Hello folks,
>
> I have two django projects, (let call them A and B) they are
> independent applications (with different django versions), I'm in need
> to sync some data/models from A to B.Â
>
> My plan is to use the post_save signal to start a celery task that
> will post a subset of data from A to B using the B API.
>
> This new data will be stored in models at B and be used in
> relationships with data in B. (To make things easier, those data will
> never(probably) be created or updated from B application)
>
> I'm seeing the necessity to keep the primary key on both
> applications synchronized too.Â
>
> My questions is: should I keep using the auto-increment id from
> django, or instead use some uuid as pk?

Ricardo

You say "never(probably)" and that sounds like a decision needs to be
made. I would always decide in favour of the easiest answer and the
least work right now.

Therefore I'd suggest using the Django auto-incrementing key in the B
project.

Synchronising keys across two projects feels ugly. If you can't decide
between "never" and "never(probably)" you could always add an
IntegerField to the applicable model class in project A to store a copy
of the primary key. Maybe use the migration and then the model save()
method to populate it.

At least then you would have a simple independent mechanism to find the
corresponding record in B should you ever need to update the data.

Mike

>
> Also, any better idea on how to implement this? Tips, unforeseen
> problems or any rant about that matter will be appreciated.
>
> Thanks in advance,
>
> --
> Att.
> Ricardo Pascal
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