Thank you for this Tom, it's been awhile since I read about the QuerySet API.
Kayode: I'm not sure you can export such data as a CSV. Why do you need the date exported in this manner? You can export the exact data from the database into a CSV, but re-importing would need a bit of work. I have a routine which imports from a CSV adding new data which currently does not exist based on a unique field. It does not update the data from CSV, although it is possible. As long as you export either the primary key or have a unique field. On Sep 2, 7:26 am, Tom Evans <[email protected]> wrote: > On Fri, Sep 2, 2011 at 11:05 AM, Kevin <[email protected]> wrote: > > An interesting question here, not sure if anybody has tried to pickle > > their QuerySets before. > > Not only have people tried this before, but there is an entry in the > manual about it: > > https://docs.djangoproject.com/en/1.3/ref/models/querysets/#pickling-... > > wrt to your later question - how can you tell if the object already > exists in the database - you need to understand what django does when > you save a model, and how to customize that behaviour. > > https://docs.djangoproject.com/en/1.3/ref/models/instances/#what-happ...https://docs.djangoproject.com/en/1.3/ref/models/instances/#how-djang...https://docs.djangoproject.com/en/1.3/ref/models/instances/#forcing-a... > > Cheers > > Tom -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
