Hello, I would like to ask, whether the following feature should/could be part of Django.
There are cases that you would the database to handle certain fields. For instance, - set fields to their default value in the dabase-level (such as a `created` timestamp), - have the value of fields computed always by the database (e.g. with a trigger), - have virtual fields in the database etc. The first case is especially important for timestamps, since setting the default to `NOW()` will make sure (at least in postgres) that all rows inserted under the same transaction will have the same timestamp (compared to how auto_now_add works). This means that, when you insert a lot of objects in one transaction, they will all have the exact same timestamp. Moreover, relying on the database for setting default values to fields reduces the amount of data that need to be sent to the database server. The second and third case allow to move some of the logic to the database and take advantage of some features they offer as well as speed up some things. I understand there are alternatives at python-level, but I am not sure how well they would work for high-traffic sites etc, without resorting to raw queries for certain operations. In order to achieve this (without resorting to hacks, like ignoring the values that django sends in the database), django should ignore these fields, when constructing an INSERT or UPDATE query. This could be done by allowing a field to tell django to ignore it on INSERT or UPDATE queries, the same way it does now for AutoFields. You can find an implementation of this approach at https://github.com/mpessas/django/commit/a663d8f95d9cca5112ccd33e3a303cae82908b60 and a demo project at https://github.com/mpessas/dbfield (timestamp app). So, does this sound like something that should be in core django? If so, should I create a ticket in trac? Can anyone think of a better way to achieve the same effect? Regards, Apostolis -- You received this message because you are subscribed to the Google Groups "Django developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/django-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/django-developers/CAEa3b%2BpHoXwcApaOS8CcPUMiYVLG2ocVHR4QQZz2r-%3D9dfHk2Q%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
