On Thu, 2011-05-12 at 09:59 +0200, Thomas Weholt wrote: > I got a model looking something like this > > class SomeModel(models.Model): > somefield = models.CharField(max_length=100, choices=somemethod()) > > The problem is that somemethod, which produces the choices to give in > the form in the admin, is called when the module is imported, not when > the form instance is created. The result from the somemethod call is > dynamic based on custom user defined code and not some static tuple or > list. > > So my question is: how can I get the choices to be set at the time of > form creation? Tried overriding the __init__, but then somefield was > only available as a string and I could not set any choice-property.
You hit common "problem". You do assignment of function/method call result not the callable itself. Small but significant difference. So whenever somefield = models.Charfield(choices=somemethod()) is evaluated it uses result of method call. And due the way objects are called value is put there when class itself is constructed (imported). This is just how it works with Python. To be able to do dynamic chocies (which also is documented that something might be wrong if choices are dynamic)) you have to pass callable - which in python means that leave out parenthesis: somefield = models.CharField(choices=somemethod) -- Jani Tiainen -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
