Your produce_string method is being run not just every time you create a new Mymodel, but every time you load an existing one from the database -- so it's overwriting your random strings on load. You'd probably do better producing the random strings in the save() method.
On Sep 15, 12:35 pm, marcovic <hicsuntmarco...@gmail.com> wrote: > Hi all, > i'm trying to do a simple task with Django but evidently it is not so > simple... > > I have my model: > > class Mymodel(models.Model): > random_string = models.CharField(max_length=200) > > def produce_string(self): > a = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "L", "M", > "N", "O", "P", "Q", "R", "S", "T", "U", "V", "Z", "0", > "1", "2", "3", "4", "5", "6", "7", "8", "9"] > num = "" > random.shuffle(a) > for x in a[:8]: > num = num + x > self.random_string= num > > What i'd like to do is having a random string stored into my new > object as soon as i'll create my object. To do that i've inserted this > method into previous code: > > def __init__(self,*args, **kwargs): > super(Mymodel, self).__init__(*args, **kwargs) > self.produce_string() > > So running django's shell, everything seems to work fine... > > from test.testing.modules import Mymodel > m = Mymodel() > m.random_string > > > "23467.." > m.save() > >OK > > But if i try to get all objects saved into my db (so using > Mymodel.objects.all()) what i get is a different result every time i > run this command. > What i've noticed is that Mymodel.objects.all() run "__init__" method > inside my class, so what i got as results is everytime a different > results set (random_string is not the one stored into db but a random > one produced by produce_string method). > > What's wrong with this code? Am i missing something? > > Many thanks in advance -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-us...@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.
