Thursday, March 20, 2014

Re: do I need to run syncdb when I change the default value in a field of a model?

On 21/03/2014 11:13am, Russell Keith-Magee wrote:
>
> On Thu, Mar 20, 2014 at 6:50 PM, Venkatraman S <venkat83@gmail.com
> <mailto:venkat83@gmail.com>> wrote:
>
>
> On Sat, Mar 15, 2014 at 7:11 AM, Russell Keith-Magee
> <russell@keith-magee.com <mailto:russell@keith-magee.com>> wrote:
>
>
> On Sat, Mar 15, 2014 at 7:19 AM, Jonathan Baker
> <jonathandavidbaker@gmail.com
> <mailto:jonathandavidbaker@gmail.com>> wrote:
>
> Does that mean that the default="" functionality is
> implemented by the ORM, instead of in the database layer?
>
> This is correct - Django's "default" argument is an API level
> default, not a database level default.
>
>
> @Russ, any specific reasons for this choice?
>
>
> Honestly - not a clue. It was like that when I got here, so the reasons
> are probably lost in the depths of time. :-)

If some things are done in the database and some in the ORM, developer
madness ensues.

I think keeping everything in the ORM is entirely manageable for
programmers. Tweaking the database is last straw optimisation.

Mike

>
> Trying to reverse engineer the decision, the most likely reason is that
> Django has allowed callable defaults; if you define a callable in your
> Django model as a default, there's no way to pass this down to the
> database (or, at least, not an easy way).
>
> Yours,
> Russ Magee %-)
>
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